KT-52373 Fix generation of synthetic functions with context receivers and default parameters

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -17474,6 +17474,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/extensionFunctions/contextReceivers/kt52207.kt");
             }
 
+            @Test
+            @TestMetadata("kt52373.kt")
+            public void testKt52373() throws Exception {
+                runTest("compiler/testData/codegen/box/extensionFunctions/contextReceivers/kt52373.kt");
+            }
+
             @Test
             @TestMetadata("overload.kt")
             public void testOverload() throws Exception {

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/IrUtils.kt

@@ -496,6 +496,10 @@ fun IrMemberAccessExpression<IrFunctionSymbol>.copyValueArgumentsFrom(
         }
     }
 
+    while (srcValueArgumentIndex < src.symbol.owner.contextReceiverParametersCount) {
+        putValueArgument(destValueArgumentIndex++, src.getValueArgument(srcValueArgumentIndex++))
+    }
+
     when {
         receiversAsArguments && srcFunction.extensionReceiverParameter != null -> {
             putValueArgument(destValueArgumentIndex++, src.extensionReceiver)
@@ -1188,29 +1192,55 @@ fun IrFactory.createStaticFunctionWithReceivers(
 
         annotations = oldFunction.annotations
 
+        valueParameters = buildList {
             var offset = 0
-        val dispatchReceiver = oldFunction.dispatchReceiverParameter?.copyTo(
+
-            this,
+            addIfNotNull(
+                oldFunction.dispatchReceiverParameter?.copyTo(
+                    this@apply,
                     name = Name.identifier("\$this"),
                     index = offset++,
                     type = remap(dispatchReceiverType!!),
                     origin = IrDeclarationOrigin.MOVED_DISPATCH_RECEIVER
                 )
-        val extensionReceiver = oldFunction.extensionReceiverParameter?.copyTo(
+            )
-            this,
+
+            addAll(
+                oldFunction.valueParameters
+                    .asSequence()
+                    .take(oldFunction.contextReceiverParametersCount)
+                    .map {
+                        it.copyTo(
+                            this@apply,
+                            index = offset++,
+                            remapTypeMap = typeParameterMap
+                        )
+                    }
+            )
+
+            addIfNotNull(
+                oldFunction.extensionReceiverParameter?.copyTo(
+                    this@apply,
                     name = Name.identifier("\$receiver"),
                     index = offset++,
                     origin = IrDeclarationOrigin.MOVED_EXTENSION_RECEIVER,
                     remapTypeMap = typeParameterMap
                 )
-        valueParameters = listOfNotNull(dispatchReceiver, extensionReceiver) +
+            )
-                oldFunction.valueParameters.map {
+
+            addAll(
+                oldFunction.valueParameters
+                    .asSequence()
+                    .drop(oldFunction.contextReceiverParametersCount)
+                    .map {
                         it.copyTo(
-                        this,
+                            this@apply,
-                        index = it.index + offset,
+                            index = offset++,
                             remapTypeMap = typeParameterMap
                         )
                     }
+            )
+        }
 
         if (copyMetadata) metadata = oldFunction.metadata
 

compiler/testData/codegen/box/extensionFunctions/contextReceivers/kt52373.kt

@@ -0,0 +1,18 @@
+// !LANGUAGE: +ContextReceivers
+// TARGET_BACKEND: JVM_IR
+
+class Context
+class Extended
+
+class Containing {
+    context(Context) fun Extended.foo(obj: Any? = null) {}
+}
+
+fun box(): String {
+    with (Containing()) {
+        with (Context()) {
+            Extended().foo()
+        }
+    }
+    return "OK"
+}

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java

@@ -17474,6 +17474,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/extensionFunctions/contextReceivers/kt52207.kt");
             }
 
+            @Test
+            @TestMetadata("kt52373.kt")
+            public void testKt52373() throws Exception {
+                runTest("compiler/testData/codegen/box/extensionFunctions/contextReceivers/kt52373.kt");
+            }
+
             @Test
             @TestMetadata("overload.kt")
             public void testOverload() throws Exception {