[JS IR BE] Fix setting names of Throwable subclasses without primary constructor

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ThrowableLowering.kt

@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.ir.backend.js.lower
 
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
+import org.jetbrains.kotlin.backend.common.lower.callsSuper
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
@@ -82,12 +83,8 @@ class ThrowableLowering(val context: JsIrBackendContext) : FileLoweringPass {
         }
 
         override fun visitConstructor(declaration: IrConstructor, data: IrDeclarationParent): IrStatement {
-            declaration.transformChildren(this, data)
-
-            if (!declaration.isPrimary) return declaration
-
             val klass = data as IrClass
-            if (klass.defaultType.isThrowableTypeOrSubtype()) {
+            if (klass.defaultType.isThrowableTypeOrSubtype() && declaration.callsSuper(context.irBuiltIns)) {
                 (declaration.body as? IrBlockBody)?.let {
                     it.statements += JsIrBuilder.buildCall(propertySetter, unitType).apply {
                         putValueArgument(0, JsIrBuilder.buildGetValue(klass.thisReceiver!!.symbol))
@@ -97,6 +94,8 @@ class ThrowableLowering(val context: JsIrBackendContext) : FileLoweringPass {
                 }
             }
 
+            declaration.transformChildren(this, data)
+
             return declaration
         }
 

js/js.translator/testData/box/expression/try/exceptionToString.kt

@@ -3,6 +3,11 @@ package foo
 
 class MyException(m: String? = null): Exception(m)
 class MyException2(m: String? = null): Throwable(m)
+
+class MyException3: Throwable {
+    constructor(m: String? = null) : super(m) {}
+}
+
 // TODO: add direct inheritors of Throwable:
 // - with cause only, in the primary constructor
 
@@ -30,6 +35,8 @@ fun box(): String {
     check(MyException("aaa"), "MyException: aaa")
     check(MyException2(), "MyException2: null")
     check(MyException2("aaa"), "MyException2: aaa")
+    check(MyException3(), "MyException3: null")
+    check(MyException3("aaa"), "MyException3: aaa")
 
     return "OK"
 }