FIR: Remove duplicated diagnostics on annotations on types.

compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantReturnUnitTypeChecker.kt

@@ -5,7 +5,7 @@ interface I {
 }
 
 class A {
-    fun too(): <!NOT_AN_ANNOTATION_CLASS, NOT_AN_ANNOTATION_CLASS!>@Annotation<!> Unit {}
+    fun too(): <!NOT_AN_ANNOTATION_CLASS!>@Annotation<!> Unit {}
 
     fun foo(): <!REDUNDANT_RETURN_UNIT_TYPE!>Unit<!>
     {

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/collectors/AbstractDiagnosticCollectorVisitor.kt

@@ -162,7 +162,12 @@ abstract class AbstractDiagnosticCollectorVisitor(
     }
 
     override fun visitResolvedTypeRef(resolvedTypeRef: FirResolvedTypeRef, data: Nothing?) {
-        super.visitResolvedTypeRef(resolvedTypeRef, data)
+        // Assuming no errors, the children of FirResolvedTypeRef (currently this can be FirAnnotationCalls) will also be present
+        // as children in delegatedTypeRef. We should make sure those elements are only visited once, otherwise diagnostics will be
+        // collected twice: once through resolvedTypeRef's children and another through resolvedTypeRef.delegatedTypeRef's children.
+        if (resolvedTypeRef.type is ConeClassErrorType) {
+            super.visitResolvedTypeRef(resolvedTypeRef, data)
+        }
         resolvedTypeRef.delegatedTypeRef?.accept(this, data)
     }
 

compiler/testData/diagnostics/tests/annotations/typeUse/kt25876.fir.kt

@@ -4,10 +4,10 @@
 @Target(AnnotationTarget.TYPE)
 annotation class Anno(val value: String)
 
-fun foo(x: String): @Anno(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>Lorem<!>, <!TOO_MANY_ARGUMENTS, TOO_MANY_ARGUMENTS!><!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>ipsum<!>::class<!>, <!TOO_MANY_ARGUMENTS, TOO_MANY_ARGUMENTS!>"dolor"<!>, <!TOO_MANY_ARGUMENTS, TOO_MANY_ARGUMENTS!><!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>sit<!>-<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>amet<!><!>) String {  // OK
+fun foo(x: String): @Anno(<!UNRESOLVED_REFERENCE!>Lorem<!>, <!TOO_MANY_ARGUMENTS!><!UNRESOLVED_REFERENCE!>ipsum<!>::class<!>, <!TOO_MANY_ARGUMENTS!>"dolor"<!>, <!TOO_MANY_ARGUMENTS!><!UNRESOLVED_REFERENCE!>sit<!>-<!UNRESOLVED_REFERENCE!>amet<!><!>) String {  // OK
     return x
 }
 
-abstract class Foo : @Anno(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>o_O<!>) Throwable()  // OK
+abstract class Foo : @Anno(<!UNRESOLVED_REFERENCE!>o_O<!>) Throwable()  // OK
 
-abstract class Bar<T : @Anno(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>O_o<!>) Any>  // OK
+abstract class Bar<T : @Anno(<!UNRESOLVED_REFERENCE!>O_o<!>) Any>  // OK

compiler/testData/diagnostics/tests/annotations/typeUse/kt46173.fir.kt

@@ -6,5 +6,5 @@
 annotation class Ann(val s: String)
 
 fun some(): Int {
-    return 1 as @Ann(<!ARGUMENT_TYPE_MISMATCH, ARGUMENT_TYPE_MISMATCH!>6<!>) Int // should error but doesn't
+    return 1 as @Ann(<!ARGUMENT_TYPE_MISMATCH!>6<!>) Int // should error but doesn't
 }

compiler/testData/diagnostics/tests/annotations/typeUse/kt8325.fir.kt

@@ -1,6 +0,0 @@
-// !LANGUAGE: +ProperCheckAnnotationsTargetInTypeUsePositions
-// ISSUE: KT-8325
-
-fun foo() {
-    object : @<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>__UNRESOLVED__<!> Any() {}
-}

compiler/testData/diagnostics/tests/annotations/typeUse/kt8325.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !LANGUAGE: +ProperCheckAnnotationsTargetInTypeUsePositions
 // ISSUE: KT-8325
 

compiler/testData/diagnostics/testsWithStdLib/coroutines/suspendFunctionType/modifierApplicability.fir.kt

@@ -22,8 +22,8 @@ typealias Test15 = (@A() suspend () -> Unit)?
 typealias Test16 = (@A suspend () -> Unit)?
 typealias Test17 = @A suspend RS.() -> Unit
 typealias Test18 = (suspend () -> Unit)?
-typealias Test19 = (@A({ val x: <!WRONG_MODIFIER_TARGET, WRONG_MODIFIER_TARGET!>suspend<!> String? = null; "" }()) suspend () -> Unit)?
+typealias Test19 = (@A({ val x: <!WRONG_MODIFIER_TARGET!>suspend<!> String? = null; "" }()) suspend () -> Unit)?
-typealias Test20 = (@A("".let { val x: <!WRONG_MODIFIER_TARGET, WRONG_MODIFIER_TARGET!>suspend<!> String? = null; it }) suspend () -> Unit)?
+typealias Test20 = (@A("".let { val x: <!WRONG_MODIFIER_TARGET!>suspend<!> String? = null; it }) suspend () -> Unit)?
 
 interface Supertype1 : suspend () -> Unit {
 

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/1.fir.kt

@@ -1,7 +0,0 @@
-// TESTCASE NUMBER: 1
-@Target(AnnotationTarget.TYPE)
-annotation class Ann(val x: Int)
-
-fun case_1(x: String): @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) String {
-    return x
-}

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/1.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 /*
  * KOTLIN DIAGNOSTICS NOT LINKED SPEC TEST (NEGATIVE)
  *

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/2.fir.kt

@@ -5,4 +5,4 @@
 @Target(AnnotationTarget.TYPE)
 annotation class Ann(val x: Int)
 
-abstract class Foo : @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) Any()
+abstract class Foo : @Ann(<!UNRESOLVED_REFERENCE!>unresolved_reference<!>) Any()

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/3.fir.kt

@@ -8,7 +8,7 @@ annotation class Ann(val x: Int)
 fun foo(i: Inv<@Ann(unresolved_reference) String>) {}
 
 // TESTCASE NUMBER: 2
-fun test(vararg a: @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) Any) {}
+fun test(vararg a: @Ann(<!UNRESOLVED_REFERENCE!>unresolved_reference<!>) Any) {}
 
 // TESTCASE NUMBER: 3
-class A<T>(a: @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) T)
+class A<T>(a: @Ann(<!UNRESOLVED_REFERENCE!>unresolved_reference<!>) T)

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/5.fir.kt

@@ -3,7 +3,7 @@
 annotation class Ann(val x: Int)
 
 // TESTCASE NUMBER: 1
-abstract class Bar<T : @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) Any>
+abstract class Bar<T : @Ann(<!UNRESOLVED_REFERENCE!>unresolved_reference<!>) Any>
 
 /*
  * TESTCASE NUMBER: 2

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/6.fir.kt

@@ -10,7 +10,7 @@ annotation class Ann(val x: Int)
  * UNEXPECTED BEHAVIOUR
  */
 fun case_1(a: Any) {
-    if (a is @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) String) return
+    if (a is @Ann(<!UNRESOLVED_REFERENCE!>unresolved_reference<!>) String) return
 }
 
 /*
@@ -18,7 +18,7 @@ fun case_1(a: Any) {
  * UNEXPECTED BEHAVIOUR
  */
 fun case_2(a: Any) {
-    a as @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) String // OK, no error in IDE and in the compiler
+    a as @Ann(<!UNRESOLVED_REFERENCE!>unresolved_reference<!>) String // OK, no error in IDE and in the compiler
 }
 
 /*
@@ -28,10 +28,10 @@ fun case_2(a: Any) {
 fun case_3_1(a: Any) {}
 
 fun case_3_2(a: Any) {
-    case_3_1(a as @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) String) // OK, no error in IDE and in the compiler
+    case_3_1(a as @Ann(<!UNRESOLVED_REFERENCE!>unresolved_reference<!>) String) // OK, no error in IDE and in the compiler
 }
 
 // TESTCASE NUMBER: 4
 fun case_4(a: Any) {
-    val x = a as @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) String // ERROR, has error in IDE and in the compiler
+    val x = a as @Ann(<!UNRESOLVED_REFERENCE!>unresolved_reference<!>) String // ERROR, has error in IDE and in the compiler
 }

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/7.fir.kt

@@ -18,4 +18,4 @@ val case_1 = object : TypeToken<@Ann(unresolved_reference) String>() {}
  */
 interface A
 
-val case_2 = object: @Ann(<!TOO_MANY_ARGUMENTS, TOO_MANY_ARGUMENTS, TOO_MANY_ARGUMENTS, TOO_MANY_ARGUMENTS, UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) A {}
+val case_2 = object: @Ann(<!TOO_MANY_ARGUMENTS, TOO_MANY_ARGUMENTS, UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) A {}

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/8.fir.kt

@@ -1,11 +0,0 @@
-// TESTCASE NUMBER: 1, 2
-@Target(AnnotationTarget.TYPE)
-annotation class Ann(val x: Int)
-
-// TESTCASE NUMBER: 1
-val <T> @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) T.test // OK, error only in IDE but not in the compiler
-    get() = 10
-
-// TESTCASE NUMBER: 2
-val @Ann(<!UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) Int.test
-    get() = 10

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/8.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 /*
  * KOTLIN DIAGNOSTICS NOT LINKED SPEC TEST (NEGATIVE)
  *

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/9.fir.kt

@@ -1,12 +0,0 @@
-// !DIAGNOSTICS: -UNUSED_PARAMETER
-
-/*
- * TESTCASE NUMBER: 1
- * UNEXPECTED BEHAVIOUR
- */
-@Target(AnnotationTarget.TYPE)
-annotation class Ann
-
-var <T> T.test
-    get() = 11
-    set(value: @Ann(<!TOO_MANY_ARGUMENTS, TOO_MANY_ARGUMENTS, UNRESOLVED_REFERENCE, UNRESOLVED_REFERENCE!>unresolved_reference<!>) Int) {}

compiler/tests-spec/testData/diagnostics/notLinked/annotations/type-annotations/neg/9.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 /*