[FIR] Improve diagnostic reporting & don't use error symbol for candidate if possible

Also introduce few new diagnostics:
- NONE_APPLICABLE more many inapplicable candidates
- HIDDEN for visible candidates

compiler/testData/ir/irText/expressions/callableReferences/adaptedWithCoercionToUnit.fir.txt

@@ -34,8 +34,8 @@ FILE fqName:<root> fileName:/adaptedWithCoercionToUnit.kt
       RETURN type=kotlin.Nothing from='public final fun testV0 (): kotlin.Unit declared in <root>'
         CALL 'public final fun useUnit0 (fn: kotlin.Function0<kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
           fn: FUNCTION_REFERENCE 'public final fun fnv (vararg xs: kotlin.Int): kotlin.Int declared in <root>' type=kotlin.reflect.KFunction0<kotlin.Unit> origin=null reflectionTarget=<same>
-  FUN name:testV1 visibility:public modality:FINAL <> () returnType:IrErrorType
+  FUN name:testV1 visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      RETURN type=kotlin.Nothing from='public final fun testV1 (): IrErrorType declared in <root>'
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useUnit1]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public final fun fnv (vararg xs: kotlin.Int): kotlin.Int declared in <root>' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.Int> origin=null reflectionTarget=<same>
+      RETURN type=kotlin.Nothing from='public final fun testV1 (): kotlin.Unit declared in <root>'
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /useUnit1>#' type=kotlin.Unit
+          ERROR_CALL 'Unsupported callable reference: ::<Unresolved reference: fnv>#' type=IrErrorType

compiler/testData/ir/irText/expressions/callableReferences/caoWithAdaptationForSam.fir.txt

@@ -104,27 +104,47 @@ FILE fqName:<root> fileName:/caoWithAdaptationForSam.kt
         CONST Int type=kotlin.Int value=42
   FUN name:test1 visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'FirArraySetCall (resolve isn't supported yet)' type=kotlin.Unit
+      BLOCK type=kotlin.Unit origin=null
+        VAR IR_TEMPORARY_VARIABLE name:tmp_0 type:<root>.A [val]
+          GET_OBJECT 'CLASS OBJECT name:A modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.A
+        VAR IR_TEMPORARY_VARIABLE name:tmp_1 type:kotlin.reflect.KFunction0<kotlin.Int> [val]
+          FUNCTION_REFERENCE 'public final fun withVararg (vararg xs: kotlin.Int): kotlin.Int declared in <root>' type=kotlin.reflect.KFunction0<kotlin.Int> origin=null reflectionTarget=<same>
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /set>#' type=kotlin.Unit
+          GET_VAR 'val tmp_1: kotlin.reflect.KFunction0<kotlin.Int> [val] declared in <root>.test1' type=kotlin.reflect.KFunction0<kotlin.Int> origin=null
+          CALL 'public final fun plus (other: kotlin.Int): kotlin.Int [operator] declared in kotlin.Int' type=kotlin.Int origin=null
+            $this: ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /get>#' type=kotlin.Int
+              GET_VAR 'val tmp_1: kotlin.reflect.KFunction0<kotlin.Int> [val] declared in <root>.test1' type=kotlin.reflect.KFunction0<kotlin.Int> origin=null
+            other: CONST Int type=kotlin.Int value=1
   FUN name:test2 visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'FirArraySetCall (resolve isn't supported yet)' type=kotlin.Unit
+      BLOCK type=kotlin.Unit origin=null
+        VAR IR_TEMPORARY_VARIABLE name:tmp_2 type:<root>.B [val]
+          GET_OBJECT 'CLASS OBJECT name:B modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.B
+        VAR IR_TEMPORARY_VARIABLE name:tmp_3 type:kotlin.reflect.KFunction0<kotlin.Int> [val]
+          FUNCTION_REFERENCE 'public final fun withVararg (vararg xs: kotlin.Int): kotlin.Int declared in <root>' type=kotlin.reflect.KFunction0<kotlin.Int> origin=null reflectionTarget=<same>
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /set>#' type=kotlin.Unit
+          GET_VAR 'val tmp_3: kotlin.reflect.KFunction0<kotlin.Int> [val] declared in <root>.test2' type=kotlin.reflect.KFunction0<kotlin.Int> origin=null
+          CALL 'public final fun plus (other: kotlin.Int): kotlin.Int [operator] declared in kotlin.Int' type=kotlin.Int origin=null
+            $this: ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /get>#' type=kotlin.Int
+              GET_VAR 'val tmp_3: kotlin.reflect.KFunction0<kotlin.Int> [val] declared in <root>.test2' type=kotlin.reflect.KFunction0<kotlin.Int> origin=null
+            other: CONST Int type=kotlin.Int value=1
   FUN name:test3 visibility:public modality:FINAL <> (fn:kotlin.Function1<kotlin.Int, kotlin.Unit>) returnType:kotlin.Unit
     VALUE_PARAMETER name:fn index:0 type:kotlin.Function1<kotlin.Int, kotlin.Unit>
     BLOCK_BODY
       BLOCK type=kotlin.Unit origin=null
-        VAR IR_TEMPORARY_VARIABLE name:tmp_0 type:<root>.A [val]
+        VAR IR_TEMPORARY_VARIABLE name:tmp_4 type:<root>.A [val]
           GET_OBJECT 'CLASS OBJECT name:A modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.A
-        VAR IR_TEMPORARY_VARIABLE name:tmp_1 type:kotlin.Function1<kotlin.Int, kotlin.Unit> [val]
+        VAR IR_TEMPORARY_VARIABLE name:tmp_5 type:kotlin.Function1<kotlin.Int, kotlin.Unit> [val]
           GET_VAR 'fn: kotlin.Function1<kotlin.Int, kotlin.Unit> declared in <root>.test3' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
         CALL 'public final fun set (i: <root>.IFoo, newValue: kotlin.Int): kotlin.Unit [operator] declared in <root>' type=kotlin.Unit origin=null
-          $receiver: GET_VAR 'val tmp_0: <root>.A [val] declared in <root>.test3' type=<root>.A origin=null
+          $receiver: GET_VAR 'val tmp_4: <root>.A [val] declared in <root>.test3' type=<root>.A origin=null
           i: TYPE_OP type=<root>.IFoo origin=SAM_CONVERSION typeOperand=<root>.IFoo
-            GET_VAR 'val tmp_1: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test3' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
+            GET_VAR 'val tmp_5: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test3' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
           newValue: CALL 'public final fun plus (other: kotlin.Int): kotlin.Int [operator] declared in kotlin.Int' type=kotlin.Int origin=null
             $this: CALL 'public final fun get (i: <root>.IFoo): kotlin.Int [operator] declared in <root>' type=kotlin.Int origin=null
-              $receiver: GET_VAR 'val tmp_0: <root>.A [val] declared in <root>.test3' type=<root>.A origin=null
+              $receiver: GET_VAR 'val tmp_4: <root>.A [val] declared in <root>.test3' type=<root>.A origin=null
               i: TYPE_OP type=<root>.IFoo origin=SAM_CONVERSION typeOperand=<root>.IFoo
-                GET_VAR 'val tmp_1: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test3' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
+                GET_VAR 'val tmp_5: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test3' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
             other: CONST Int type=kotlin.Int value=1
   FUN name:test4 visibility:public modality:FINAL <> (fn:kotlin.Function1<kotlin.Int, kotlin.Unit>) returnType:kotlin.Unit
     VALUE_PARAMETER name:fn index:0 type:kotlin.Function1<kotlin.Int, kotlin.Unit>
@@ -134,18 +154,18 @@ FILE fqName:<root> fileName:/caoWithAdaptationForSam.kt
           if: TYPE_OP type=kotlin.Boolean origin=INSTANCEOF typeOperand=<root>.IFoo
             GET_VAR 'fn: kotlin.Function1<kotlin.Int, kotlin.Unit> declared in <root>.test4' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
           then: BLOCK type=kotlin.Unit origin=null
-            VAR IR_TEMPORARY_VARIABLE name:tmp_2 type:<root>.A [val]
+            VAR IR_TEMPORARY_VARIABLE name:tmp_6 type:<root>.A [val]
               GET_OBJECT 'CLASS OBJECT name:A modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.A
-            VAR IR_TEMPORARY_VARIABLE name:tmp_3 type:<root>.IFoo [val]
+            VAR IR_TEMPORARY_VARIABLE name:tmp_7 type:<root>.IFoo [val]
               TYPE_OP type=<root>.IFoo origin=IMPLICIT_CAST typeOperand=<root>.IFoo
                 GET_VAR 'fn: kotlin.Function1<kotlin.Int, kotlin.Unit> declared in <root>.test4' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
             CALL 'public final fun set (i: <root>.IFoo, newValue: kotlin.Int): kotlin.Unit [operator] declared in <root>' type=kotlin.Unit origin=null
-              $receiver: GET_VAR 'val tmp_2: <root>.A [val] declared in <root>.test4' type=<root>.A origin=null
-              i: GET_VAR 'val tmp_3: <root>.IFoo [val] declared in <root>.test4' type=<root>.IFoo origin=null
+              $receiver: GET_VAR 'val tmp_6: <root>.A [val] declared in <root>.test4' type=<root>.A origin=null
+              i: GET_VAR 'val tmp_7: <root>.IFoo [val] declared in <root>.test4' type=<root>.IFoo origin=null
               newValue: CALL 'public final fun plus (other: kotlin.Int): kotlin.Int [operator] declared in kotlin.Int' type=kotlin.Int origin=null
                 $this: CALL 'public final fun get (i: <root>.IFoo): kotlin.Int [operator] declared in <root>' type=kotlin.Int origin=null
-                  $receiver: GET_VAR 'val tmp_2: <root>.A [val] declared in <root>.test4' type=<root>.A origin=null
-                  i: GET_VAR 'val tmp_3: <root>.IFoo [val] declared in <root>.test4' type=<root>.IFoo origin=null
+                  $receiver: GET_VAR 'val tmp_6: <root>.A [val] declared in <root>.test4' type=<root>.A origin=null
+                  i: GET_VAR 'val tmp_7: <root>.IFoo [val] declared in <root>.test4' type=<root>.IFoo origin=null
                 other: CONST Int type=kotlin.Int value=1
   FUN name:test5 visibility:public modality:FINAL <> (a:kotlin.Any) returnType:kotlin.Unit
     VALUE_PARAMETER name:a index:0 type:kotlin.Any
@@ -153,20 +173,20 @@ FILE fqName:<root> fileName:/caoWithAdaptationForSam.kt
       TYPE_OP type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=CAST typeOperand=kotlin.Function1<kotlin.Int, kotlin.Unit>
         GET_VAR 'a: kotlin.Any declared in <root>.test5' type=kotlin.Any origin=null
       BLOCK type=kotlin.Unit origin=null
-        VAR IR_TEMPORARY_VARIABLE name:tmp_4 type:<root>.A [val]
+        VAR IR_TEMPORARY_VARIABLE name:tmp_8 type:<root>.A [val]
           GET_OBJECT 'CLASS OBJECT name:A modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.A
-        VAR IR_TEMPORARY_VARIABLE name:tmp_5 type:kotlin.Function1<kotlin.Int, kotlin.Unit> [val]
+        VAR IR_TEMPORARY_VARIABLE name:tmp_9 type:kotlin.Function1<kotlin.Int, kotlin.Unit> [val]
           TYPE_OP type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=IMPLICIT_CAST typeOperand=kotlin.Function1<kotlin.Int, kotlin.Unit>
             GET_VAR 'a: kotlin.Any declared in <root>.test5' type=kotlin.Any origin=null
         CALL 'public final fun set (i: <root>.IFoo, newValue: kotlin.Int): kotlin.Unit [operator] declared in <root>' type=kotlin.Unit origin=null
-          $receiver: GET_VAR 'val tmp_4: <root>.A [val] declared in <root>.test5' type=<root>.A origin=null
+          $receiver: GET_VAR 'val tmp_8: <root>.A [val] declared in <root>.test5' type=<root>.A origin=null
           i: TYPE_OP type=<root>.IFoo origin=SAM_CONVERSION typeOperand=<root>.IFoo
-            GET_VAR 'val tmp_5: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test5' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
+            GET_VAR 'val tmp_9: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test5' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
           newValue: CALL 'public final fun plus (other: kotlin.Int): kotlin.Int [operator] declared in kotlin.Int' type=kotlin.Int origin=null
             $this: CALL 'public final fun get (i: <root>.IFoo): kotlin.Int [operator] declared in <root>' type=kotlin.Int origin=null
-              $receiver: GET_VAR 'val tmp_4: <root>.A [val] declared in <root>.test5' type=<root>.A origin=null
+              $receiver: GET_VAR 'val tmp_8: <root>.A [val] declared in <root>.test5' type=<root>.A origin=null
               i: TYPE_OP type=<root>.IFoo origin=SAM_CONVERSION typeOperand=<root>.IFoo
-                GET_VAR 'val tmp_5: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test5' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
+                GET_VAR 'val tmp_9: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test5' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
             other: CONST Int type=kotlin.Int value=1
   FUN name:test6 visibility:public modality:FINAL <> (a:kotlin.Any) returnType:kotlin.Unit
     VALUE_PARAMETER name:a index:0 type:kotlin.Any
@@ -177,16 +197,16 @@ FILE fqName:<root> fileName:/caoWithAdaptationForSam.kt
         TYPE_OP type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=IMPLICIT_CAST typeOperand=kotlin.Function1<kotlin.Int, kotlin.Unit>
           GET_VAR 'a: kotlin.Any declared in <root>.test6' type=kotlin.Any origin=null
       BLOCK type=kotlin.Unit origin=null
-        VAR IR_TEMPORARY_VARIABLE name:tmp_6 type:<root>.A [val]
+        VAR IR_TEMPORARY_VARIABLE name:tmp_10 type:<root>.A [val]
           GET_OBJECT 'CLASS OBJECT name:A modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.A
-        VAR IR_TEMPORARY_VARIABLE name:tmp_7 type:kotlin.Function1<kotlin.Int, kotlin.Unit> [val]
+        VAR IR_TEMPORARY_VARIABLE name:tmp_11 type:kotlin.Function1<kotlin.Int, kotlin.Unit> [val]
           TYPE_OP type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=IMPLICIT_CAST typeOperand=kotlin.Function1<kotlin.Int, kotlin.Unit>
             GET_VAR 'a: kotlin.Any declared in <root>.test6' type=kotlin.Any origin=null
         CALL 'public final fun set (i: <root>.IFoo, newValue: kotlin.Int): kotlin.Unit [operator] declared in <root>' type=kotlin.Unit origin=null
-          $receiver: GET_VAR 'val tmp_6: <root>.A [val] declared in <root>.test6' type=<root>.A origin=null
-          i: GET_VAR 'val tmp_7: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test6' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
+          $receiver: GET_VAR 'val tmp_10: <root>.A [val] declared in <root>.test6' type=<root>.A origin=null
+          i: GET_VAR 'val tmp_11: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test6' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
           newValue: CALL 'public final fun plus (other: kotlin.Int): kotlin.Int [operator] declared in kotlin.Int' type=kotlin.Int origin=null
             $this: CALL 'public final fun get (i: <root>.IFoo): kotlin.Int [operator] declared in <root>' type=kotlin.Int origin=null
-              $receiver: GET_VAR 'val tmp_6: <root>.A [val] declared in <root>.test6' type=<root>.A origin=null
-              i: GET_VAR 'val tmp_7: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test6' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
+              $receiver: GET_VAR 'val tmp_10: <root>.A [val] declared in <root>.test6' type=<root>.A origin=null
+              i: GET_VAR 'val tmp_11: kotlin.Function1<kotlin.Int, kotlin.Unit> [val] declared in <root>.test6' type=kotlin.Function1<kotlin.Int, kotlin.Unit> origin=null
             other: CONST Int type=kotlin.Int value=1

compiler/testData/ir/irText/expressions/callableReferences/constructorWithAdaptedArguments.fir.txt

@@ -66,21 +66,19 @@ FILE fqName:<root> fileName:/constructorWithAdaptedArguments.kt
       overridden:
         public open fun toString (): kotlin.String declared in kotlin.Any
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
-  FUN name:testConstructor visibility:public modality:FINAL <> () returnType:IrErrorType
+  FUN name:testConstructor visibility:public modality:FINAL <> () returnType:kotlin.Any
     BLOCK_BODY
-      RETURN type=kotlin.Nothing from='public final fun testConstructor (): IrErrorType declared in <root>'
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public constructor <init> (vararg xs: kotlin.Int) [primary] declared in <root>.C' type=kotlin.reflect.KFunction1<kotlin.IntArray, <root>.C> origin=null reflectionTarget=<same>
-  FUN name:testInnerClassConstructor visibility:public modality:FINAL <> (outer:<root>.Outer) returnType:IrErrorType
+      RETURN type=kotlin.Nothing from='public final fun testConstructor (): kotlin.Any declared in <root>'
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.Any
+          ERROR_CALL 'Unsupported callable reference: ::<Unresolved reference: C>#' type=IrErrorType
+  FUN name:testInnerClassConstructor visibility:public modality:FINAL <> (outer:<root>.Outer) returnType:kotlin.Any
     VALUE_PARAMETER name:outer index:0 type:<root>.Outer
     BLOCK_BODY
-      RETURN type=kotlin.Nothing from='public final fun testInnerClassConstructor (outer: <root>.Outer): IrErrorType declared in <root>'
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public constructor <init> (vararg xs: kotlin.Int) [primary] declared in <root>.Outer.Inner' type=kotlin.reflect.KFunction1<kotlin.IntArray, <root>.Outer.Inner> origin=null reflectionTarget=<same>
-            $this: GET_VAR 'outer: <root>.Outer declared in <root>.testInnerClassConstructor' type=<root>.Outer origin=null
-  FUN name:testInnerClassConstructorCapturingOuter visibility:public modality:FINAL <> () returnType:IrErrorType
+      RETURN type=kotlin.Nothing from='public final fun testInnerClassConstructor (outer: <root>.Outer): kotlin.Any declared in <root>'
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.Any
+          ERROR_CALL 'Unsupported callable reference: R|<local>/outer|::<Unresolved reference: Inner>#' type=IrErrorType
+  FUN name:testInnerClassConstructorCapturingOuter visibility:public modality:FINAL <> () returnType:kotlin.Any
     BLOCK_BODY
-      RETURN type=kotlin.Nothing from='public final fun testInnerClassConstructorCapturingOuter (): IrErrorType declared in <root>'
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public constructor <init> (vararg xs: kotlin.Int) [primary] declared in <root>.Outer.Inner' type=kotlin.reflect.KFunction1<kotlin.IntArray, <root>.Outer.Inner> origin=null reflectionTarget=<same>
-            $this: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.Outer' type=<root>.Outer origin=null
+      RETURN type=kotlin.Nothing from='public final fun testInnerClassConstructorCapturingOuter (): kotlin.Any declared in <root>'
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.Any
+          ERROR_CALL 'Unsupported callable reference: R|/Outer.Outer|()::<Unresolved reference: Inner>#' type=IrErrorType

compiler/testData/ir/irText/expressions/callableReferences/suspendConversion.fir.txt

@@ -82,8 +82,8 @@ FILE fqName:<root> fileName:/suspendConversion.kt
               CALL 'public final fun foo2 (vararg xs: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
   FUN name:testWithVarargMapped visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useSuspendInt]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun foo2 (vararg xs: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.Unit> origin=null reflectionTarget=<same>
+      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /useSuspendInt>#' type=kotlin.Unit
+        ERROR_CALL 'Unsupported callable reference: ::<Unresolved reference: foo2>#' type=IrErrorType
   FUN name:testWithCoercionToUnit visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
       CALL 'public final fun useSuspend (fn: kotlin.coroutines.SuspendFunction0<kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null

compiler/testData/ir/irText/expressions/callableReferences/unboundMemberReferenceWithAdaptedArguments.fir.txt

@@ -59,16 +59,14 @@ FILE fqName:<root> fileName:/unboundMemberReferenceWithAdaptedArguments.kt
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   FUN name:testUnbound visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use1]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public open fun foo (vararg xs: kotlin.Int): kotlin.Int declared in <root>.A' type=kotlin.reflect.KFunction2<<root>.A, kotlin.IntArray, kotlin.Int> origin=null reflectionTarget=<same>
+      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use1>#' type=kotlin.Unit
+        ERROR_CALL 'Unsupported callable reference: Q|A|::<Unresolved reference: foo>#' type=IrErrorType
   FUN name:testBound visibility:public modality:FINAL <> (a:<root>.A) returnType:kotlin.Unit
     VALUE_PARAMETER name:a index:0 type:<root>.A
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use2]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public open fun foo (vararg xs: kotlin.Int): kotlin.Int declared in <root>.A' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.Int> origin=null reflectionTarget=<same>
-          $this: GET_VAR 'a: <root>.A declared in <root>.testBound' type=<root>.A origin=null
+      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use2>#' type=kotlin.Unit
+        ERROR_CALL 'Unsupported callable reference: R|<local>/a|::<Unresolved reference: foo>#' type=IrErrorType
   FUN name:testObject visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use2]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun foo (vararg xs: kotlin.Int): kotlin.Int declared in <root>.Obj' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.Int> origin=null reflectionTarget=<same>
-          $this: GET_OBJECT 'CLASS OBJECT name:Obj modality:FINAL visibility:public superTypes:[<root>.A]' type=<root>.Obj
+      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use2>#' type=kotlin.Unit
+        ERROR_CALL 'Unsupported callable reference: Q|Obj|::<Unresolved reference: foo>#' type=IrErrorType

compiler/testData/ir/irText/expressions/callableReferences/withAdaptationForSam.fir.txt

@@ -27,5 +27,5 @@ FILE fqName:<root> fileName:/withAdaptationForSam.kt
         CONST Int type=kotlin.Int value=42
   FUN name:test visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useFoo]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun withVararg (vararg xs: kotlin.Int): kotlin.Int declared in <root>' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.Int> origin=null reflectionTarget=<same>
+      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /useFoo>#' type=kotlin.Unit
+        ERROR_CALL 'Unsupported callable reference: ::<Unresolved reference: withVararg>#' type=IrErrorType

compiler/testData/ir/irText/expressions/callableReferences/withAdaptedArguments.fir.txt

@@ -68,22 +68,21 @@ FILE fqName:<root> fileName:/withAdaptedArguments.kt
       RETURN type=kotlin.Nothing from='public final fun testDefault (): kotlin.String declared in <root>'
         CALL 'public final fun use (fn: kotlin.Function1<kotlin.Int, kotlin.String>): kotlin.String declared in <root>' type=kotlin.String origin=null
           fn: FUNCTION_REFERENCE 'public final fun fnWithDefault (a: kotlin.Int, b: kotlin.Int): kotlin.String declared in <root>' type=kotlin.reflect.KFunction1<kotlin.Int, kotlin.String> origin=null reflectionTarget=<same>
-  FUN name:testVararg visibility:public modality:FINAL <> () returnType:IrErrorType
+  FUN name:testVararg visibility:public modality:FINAL <> () returnType:kotlin.String
     BLOCK_BODY
-      RETURN type=kotlin.Nothing from='public final fun testVararg (): IrErrorType declared in <root>'
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public final fun fnWithVarargs (vararg xs: kotlin.Int): kotlin.String declared in <root>' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.String> origin=null reflectionTarget=<same>
+      RETURN type=kotlin.Nothing from='public final fun testVararg (): kotlin.String declared in <root>'
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.String
+          ERROR_CALL 'Unsupported callable reference: ::<Unresolved reference: fnWithVarargs>#' type=IrErrorType
   FUN name:testCoercionToUnit visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
       RETURN type=kotlin.Nothing from='public final fun testCoercionToUnit (): kotlin.Unit declared in <root>'
         CALL 'public final fun coerceToUnit (fn: kotlin.Function1<kotlin.Int, kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
           fn: FUNCTION_REFERENCE 'public final fun fnWithDefault (a: kotlin.Int, b: kotlin.Int): kotlin.String declared in <root>' type=kotlin.reflect.KFunction1<kotlin.Int, kotlin.Unit> origin=null reflectionTarget=<same>
-  FUN name:testImportedObjectMember visibility:public modality:FINAL <> () returnType:IrErrorType
+  FUN name:testImportedObjectMember visibility:public modality:FINAL <> () returnType:kotlin.String
     BLOCK_BODY
-      RETURN type=kotlin.Nothing from='public final fun testImportedObjectMember (): IrErrorType declared in <root>'
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public final fun importedObjectMemberWithVarargs (vararg xs: kotlin.Int): kotlin.String declared in <root>.Host' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.String> origin=null reflectionTarget=<same>
-            $this: GET_OBJECT 'CLASS OBJECT name:Host modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.Host
+      RETURN type=kotlin.Nothing from='public final fun testImportedObjectMember (): kotlin.String declared in <root>'
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.String
+          ERROR_CALL 'Unsupported callable reference: ::<Unresolved reference: importedObjectMemberWithVarargs>#' type=IrErrorType
   FUN name:testDefault0 visibility:public modality:FINAL <> () returnType:kotlin.String
     BLOCK_BODY
       RETURN type=kotlin.Nothing from='public final fun testDefault0 (): kotlin.String declared in <root>'

compiler/testData/ir/irText/expressions/callableReferences/withArgumentAdaptationAndReceiver.fir.txt

@@ -20,38 +20,33 @@ FILE fqName:<root> fileName:/withArgumentAdaptationAndReceiver.kt
     FUN name:testImplicitThis visibility:public modality:FINAL <> ($this:<root>.Host) returnType:kotlin.Unit
       $this: VALUE_PARAMETER name:<this> type:<root>.Host
       BLOCK_BODY
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public final fun withVararg (vararg xs: kotlin.Int): kotlin.String declared in <root>.Host' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.String> origin=null reflectionTarget=<same>
-            $this: GET_VAR '<this>: <root>.Host declared in <root>.Host.testImplicitThis' type=<root>.Host origin=null
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.Unit
+          ERROR_CALL 'Unsupported callable reference: ::<Unresolved reference: withVararg>#' type=IrErrorType
     FUN name:testBoundReceiverLocalVal visibility:public modality:FINAL <> ($this:<root>.Host) returnType:kotlin.Unit
       $this: VALUE_PARAMETER name:<this> type:<root>.Host
       BLOCK_BODY
         VAR name:h type:<root>.Host [val]
           CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.Host' type=<root>.Host origin=null
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public final fun withVararg (vararg xs: kotlin.Int): kotlin.String declared in <root>.Host' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.String> origin=null reflectionTarget=<same>
-            $this: GET_VAR 'val h: <root>.Host [val] declared in <root>.Host.testBoundReceiverLocalVal' type=<root>.Host origin=null
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.Unit
+          ERROR_CALL 'Unsupported callable reference: R|<local>/h|::<Unresolved reference: withVararg>#' type=IrErrorType
     FUN name:testBoundReceiverLocalVar visibility:public modality:FINAL <> ($this:<root>.Host) returnType:kotlin.Unit
       $this: VALUE_PARAMETER name:<this> type:<root>.Host
       BLOCK_BODY
         VAR name:h type:<root>.Host [var]
           CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.Host' type=<root>.Host origin=null
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public final fun withVararg (vararg xs: kotlin.Int): kotlin.String declared in <root>.Host' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.String> origin=null reflectionTarget=<same>
-            $this: GET_VAR 'var h: <root>.Host [var] declared in <root>.Host.testBoundReceiverLocalVar' type=<root>.Host origin=null
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.Unit
+          ERROR_CALL 'Unsupported callable reference: R|<local>/h|::<Unresolved reference: withVararg>#' type=IrErrorType
     FUN name:testBoundReceiverParameter visibility:public modality:FINAL <> ($this:<root>.Host, h:<root>.Host) returnType:kotlin.Unit
       $this: VALUE_PARAMETER name:<this> type:<root>.Host
       VALUE_PARAMETER name:h index:0 type:<root>.Host
       BLOCK_BODY
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public final fun withVararg (vararg xs: kotlin.Int): kotlin.String declared in <root>.Host' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.String> origin=null reflectionTarget=<same>
-            $this: GET_VAR 'h: <root>.Host declared in <root>.Host.testBoundReceiverParameter' type=<root>.Host origin=null
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.Unit
+          ERROR_CALL 'Unsupported callable reference: R|<local>/h|::<Unresolved reference: withVararg>#' type=IrErrorType
     FUN name:testBoundReceiverExpression visibility:public modality:FINAL <> ($this:<root>.Host) returnType:kotlin.Unit
       $this: VALUE_PARAMETER name:<this> type:<root>.Host
       BLOCK_BODY
-        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/use]>#' type=IrErrorType
-          FUNCTION_REFERENCE 'public final fun withVararg (vararg xs: kotlin.Int): kotlin.String declared in <root>.Host' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.String> origin=null reflectionTarget=<same>
-            $this: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.Host' type=<root>.Host origin=null
+        ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /use>#' type=kotlin.Unit
+          ERROR_CALL 'Unsupported callable reference: R|/Host.Host|()::<Unresolved reference: withVararg>#' type=IrErrorType
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
         public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any

compiler/testData/ir/irText/expressions/callableReferences/withVarargViewedAsArray.fir.txt

@@ -60,8 +60,8 @@ FILE fqName:<root> fileName:/withVarargViewedAsArray.kt
     BLOCK_BODY
   FUN name:testPlainArgs visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/usePlainArgs]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun sum (vararg args: kotlin.Int): kotlin.Int declared in <root>' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.Int> origin=null reflectionTarget=<same>
+      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): /usePlainArgs>#' type=kotlin.Unit
+        ERROR_CALL 'Unsupported callable reference: ::<Unresolved reference: sum>#' type=IrErrorType
   FUN name:testPrimitiveArrayAsVararg visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
       CALL 'public final fun usePrimitiveArray (fn: kotlin.Function1<kotlin.IntArray, kotlin.Int>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null