[tests] Add test data for KT-53740

compiler/testData/codegen/box/builderInference/issues/kt53740a.kt

@@ -0,0 +1,45 @@
+// ISSUE: KT-53740
+
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND_K1: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+// IGNORE_BACKEND_K2: JVM_IR, WASM
+// REASON: run-time failure (java.lang.ClassCastException: TargetType cannot be cast to DifferentType @ Kt53740aKt$box$2.invoke)
+
+fun box(): String {
+    parallelBuild(
+        {
+            setTypeVariable(TargetType())
+        },
+        {
+            consumeDifferentType(getTypeVariable())
+        }
+    )
+    return "OK"
+}
+
+
+
+
+class TargetType
+class DifferentType
+
+fun consumeDifferentType(value: DifferentType) {}
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    fun getTypeVariable(): TV = storage
+    private var storage: TV = TargetType() as TV
+}
+
+fun <PTV> parallelBuild(
+    instructionsA: Buildee<PTV>.(PTV) -> Unit,
+    instructionsB: Buildee<PTV>.(PTV) -> Unit
+): Buildee<PTV> {
+    val value = TargetType() as PTV
+    return Buildee<PTV>().apply {
+        instructionsA(value)
+        instructionsB(value)
+    }
+}

compiler/testData/codegen/box/builderInference/issues/kt53740b.kt

@@ -0,0 +1,53 @@
+// ISSUE: KT-53740
+
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND_K1: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+// IGNORE_BACKEND_K2: JVM_IR, WASM
+// REASON: run-time failure (java.lang.ClassCastException: TargetType cannot be cast to DifferentType @ Kt53740bKt$box$2.invoke)
+
+fun box(): String {
+    parallelInOutBuild(
+        {
+            setInProjectedTypeVariable(TargetType())
+        },
+        {
+            consumeDifferentType(getOutProjectedTypeVariable())
+        }
+    )
+    return "OK"
+}
+
+
+
+
+class TargetType
+class DifferentType
+
+fun consumeDifferentType(value: DifferentType) {}
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    fun getTypeVariable(): TV = storage
+    private var storage: TV = TargetType() as TV
+}
+
+class OutBuildee<out OTV>(private val buildee: Buildee<out OTV>) {
+    fun getOutProjectedTypeVariable(): OTV = buildee.getTypeVariable()
+}
+
+class InBuildee<in ITV>(private val buildee: Buildee<in ITV>) {
+    fun setInProjectedTypeVariable(value: ITV) { buildee.setTypeVariable(value) }
+}
+
+fun <PTV> parallelInOutBuild(
+    inProjectedInstructions: InBuildee<PTV>.(PTV) -> Unit,
+    outProjectedInstructions: OutBuildee<PTV>.(PTV) -> Unit
+): Buildee<PTV> {
+    val value = TargetType() as PTV
+    return Buildee<PTV>().apply {
+        InBuildee(this).inProjectedInstructions(value)
+        OutBuildee(this).outProjectedInstructions(value)
+    }
+}