Tests for some more cases of JVM signature clashes

compiler/testData/cli/jvm/signatureClash.kt

@@ -19,3 +19,16 @@ trait Tr {
 class SubTr : Tr {
     val tr = 1
 }
+
+// Clashing synthetic accessors are only reported in compiler, IDE doesn't see them
+class C {
+    private fun f() {}
+    fun `f$b$0`(c: C) {}
+
+    class Nested {
+
+        fun test() {
+            C().f()
+        }
+    }
+}

compiler/testData/cli/jvm/signatureClash.out

@@ -1,3 +1,4 @@
+WARNING: $TESTDATA_DIR$/signatureClash.kt: (26, 17) Parameter 'c' is never used
 ERROR: $TESTDATA_DIR$/signatureClash.kt: (6, 5) Accidental override: The following declarations have the same JVM signature (getX()I):
     fun getX(): kotlin.Int
     fun <get-x>(): kotlin.Int
@@ -19,4 +20,10 @@ ERROR: $TESTDATA_DIR$/signatureClash.kt: (16, 5) Platform declaration clash: The
 ERROR: $TESTDATA_DIR$/signatureClash.kt: (20, 5) Platform declaration clash: The following declarations have the same JVM signature (getTr()I):
     fun <get-tr>(): kotlin.Int
     fun getTr(): kotlin.Int
+ERROR: $TESTDATA_DIR$/signatureClash.kt: (24, 7) Platform declaration clash: The following declarations have the same JVM signature (f$b$0(LC;)V):
+    fun f$b$0(c: C): kotlin.Unit
+    fun f(): kotlin.Unit
+ERROR: $TESTDATA_DIR$/signatureClash.kt: (26, 5) Platform declaration clash: The following declarations have the same JVM signature (f$b$0(LC;)V):
+    fun f$b$0(c: C): kotlin.Unit
+    fun f(): kotlin.Unit
 COMPILATION_ERROR

compiler/testData/diagnostics/tests/duplicateJvmSignature/caseInProperties.kt

@@ -0,0 +1,2 @@
+<!CONFLICTING_JVM_DECLARATIONS!>val aa<!> = 1
+<!CONFLICTING_JVM_DECLARATIONS!>val Aa<!> = 1

compiler/testData/diagnostics/tests/duplicateJvmSignature/erasure/extensionProperties.kt

@@ -0,0 +1,7 @@
+class G<T>
+
+val <T> G<T>.foo: Int
+    <!CONFLICTING_JVM_DECLARATIONS!>get()<!> = 1
+
+val G<String>.foo: Int
+    <!CONFLICTING_JVM_DECLARATIONS!>get()<!> = 1

compiler/testData/diagnostics/tests/duplicateJvmSignature/vararg.kt

@@ -0,0 +1,5 @@
+<!CONFLICTING_OVERLOADS!>fun foo(vararg <!UNUSED_PARAMETER!>x<!>: Int)<!> {}
+<!CONFLICTING_OVERLOADS!>fun foo(<!UNUSED_PARAMETER!>x<!>: IntArray)<!> {}
+
+<!CONFLICTING_JVM_DECLARATIONS!>fun foo(vararg <!UNUSED_PARAMETER!>x<!>: Int?)<!> {}
+<!CONFLICTING_JVM_DECLARATIONS!>fun foo(<!UNUSED_PARAMETER!>x<!>: Array<Int>)<!> {}