JS: add test to prove that KT-13523 is no more reproducible

compiler/testData/codegen/box/operatorConventions/augmentedAssignmentWithArrayLHS.kt

@@ -0,0 +1,33 @@
+var log = ""
+
+fun foo(): Int {
+    log += "foo;"
+    return 1
+}
+fun bar(): Int {
+    log += "bar;"
+    return 42
+}
+
+data class A(val x: Int) {
+    operator fun plus(other: A) = A(x + other.x)
+}
+
+fun box(): String {
+    val array = arrayOf(0, 1)
+    array[foo()] += bar()
+
+    if (array[0] != 0) return "fail1a: ${array[0]}"
+    if (array[1] != 43) return "fail1b: ${array[0]}"
+
+    log += "!;"
+
+    val objArray = arrayOf(A(0), A(1))
+    objArray[foo()] += A(bar())
+    if (objArray[0] != A(0)) return "fail2a: ${array[0]}"
+    if (objArray[1] != A(43)) return "fail2b: ${array[0]}"
+
+    if (log != "foo;bar;!;foo;bar;") return "fail3: $log"
+
+    return "OK"
+}

compiler/testData/codegen/light-analysis/operatorConventions/augmentedAssignmentWithArrayLHS.txt

@@ -0,0 +1,21 @@
+public final class A {
+    private final field x: int
+    public method <init>(p0: int): void
+    public final method component1(): int
+    public synthetic static method copy$default(p0: A, p1: int, p2: int, p3: java.lang.Object): A
+    public final @org.jetbrains.annotations.NotNull method copy(p0: int): A
+    public method equals(p0: java.lang.Object): boolean
+    public final method getX(): int
+    public method hashCode(): int
+    public final @org.jetbrains.annotations.NotNull method plus(@org.jetbrains.annotations.NotNull p0: A): A
+    public method toString(): java.lang.String
+}
+
+public final class AugmentedAssignmentWithArrayLHSKt {
+    private static @org.jetbrains.annotations.NotNull field log: java.lang.String
+    public final static method bar(): int
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static method foo(): int
+    public final static @org.jetbrains.annotations.NotNull method getLog(): java.lang.String
+    public final static method setLog(@org.jetbrains.annotations.NotNull p0: java.lang.String): void
+}

compiler/tests-ir-jvm/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -10595,6 +10595,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             doTest(fileName);
         }
 
+        @TestMetadata("augmentedAssignmentWithArrayLHS.kt")
+        public void testAugmentedAssignmentWithArrayLHS() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/operatorConventions/augmentedAssignmentWithArrayLHS.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("incDecOnObject.kt")
         public void testIncDecOnObject() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/operatorConventions/incDecOnObject.kt");

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -10595,6 +10595,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("augmentedAssignmentWithArrayLHS.kt")
+        public void testAugmentedAssignmentWithArrayLHS() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/operatorConventions/augmentedAssignmentWithArrayLHS.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("incDecOnObject.kt")
         public void testIncDecOnObject() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/operatorConventions/incDecOnObject.kt");

compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeCodegenTestGenerated.java

@@ -10595,6 +10595,12 @@ public class LightAnalysisModeCodegenTestGenerated extends AbstractLightAnalysis
             doTest(fileName);
         }
 
+        @TestMetadata("augmentedAssignmentWithArrayLHS.kt")
+        public void testAugmentedAssignmentWithArrayLHS() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/operatorConventions/augmentedAssignmentWithArrayLHS.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("incDecOnObject.kt")
         public void testIncDecOnObject() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/operatorConventions/incDecOnObject.kt");

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -12456,6 +12456,12 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             doTest(fileName);
         }
 
+        @TestMetadata("augmentedAssignmentWithArrayLHS.kt")
+        public void testAugmentedAssignmentWithArrayLHS() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/operatorConventions/augmentedAssignmentWithArrayLHS.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("incDecOnObject.kt")
         public void testIncDecOnObject() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/operatorConventions/incDecOnObject.kt");