From 222648615227ad2caa56d4010ef0ed443aed8429 Mon Sep 17 00:00:00 2001
From: Stanislav Ruban <stanislav.ruban@jetbrains.com>
Date: Sat, 2 Dec 2023 15:27:07 +0100
Subject: [PATCH] [tests] Add test data for KT-56949

---
 .../box/builderInference/issues/kt56949.kt    | 34 +++++++++++++++++++
 .../builderInference/issues/kt56949.fir.kt    | 30 ++++++++++++++++
 .../tests/builderInference/issues/kt56949.kt  | 30 ++++++++++++++++
 3 files changed, 94 insertions(+)
 create mode 100644 compiler/testData/codegen/box/builderInference/issues/kt56949.kt
 create mode 100644 compiler/testData/diagnostics/tests/builderInference/issues/kt56949.fir.kt
 create mode 100644 compiler/testData/diagnostics/tests/builderInference/issues/kt56949.kt

diff --git a/compiler/testData/codegen/box/builderInference/issues/kt56949.kt b/compiler/testData/codegen/box/builderInference/issues/kt56949.kt
new file mode 100644
index 00000000000..cb80c3ac8d9
--- /dev/null
+++ b/compiler/testData/codegen/box/builderInference/issues/kt56949.kt
@@ -0,0 +1,34 @@
+// ISSUE: KT-56949
+
+// 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 @ Kt56949Kt$box$1.invoke)
+
+fun box(): String {
+    build {
+        setTypeVariable(TargetType())
+        consumeDifferentTypeSubtype(getTypeVariable())
+    }
+    return "OK"
+}
+
+
+
+
+class TargetType
+class DifferentType
+
+fun <T: DifferentType> consumeDifferentTypeSubtype(value: T) {}
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    fun getTypeVariable(): TV = storage
+    private var storage: TV = TargetType() as TV
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/diagnostics/tests/builderInference/issues/kt56949.fir.kt b/compiler/testData/diagnostics/tests/builderInference/issues/kt56949.fir.kt
new file mode 100644
index 00000000000..42fd1be2c67
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/builderInference/issues/kt56949.fir.kt
@@ -0,0 +1,30 @@
+// ISSUE: KT-56949
+// CHECK_TYPE_WITH_EXACT
+
+fun test() {
+    val buildee = build {
+        setTypeVariable(TargetType())
+        consumeDifferentTypeSubtype(getTypeVariable())
+    }
+    // exact type equality check — turns unexpected compile-time behavior into red code
+    // considered to be non-user-reproducible code for the purposes of these tests
+    checkExactType<Buildee<TargetType>>(buildee)
+}
+
+
+
+
+class TargetType
+class DifferentType
+
+fun <T: <!FINAL_UPPER_BOUND!>DifferentType<!>> consumeDifferentTypeSubtype(value: T) {}
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    fun getTypeVariable(): TV = storage
+    private var storage: TV = null!!
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/diagnostics/tests/builderInference/issues/kt56949.kt b/compiler/testData/diagnostics/tests/builderInference/issues/kt56949.kt
new file mode 100644
index 00000000000..62dc9184312
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/builderInference/issues/kt56949.kt
@@ -0,0 +1,30 @@
+// ISSUE: KT-56949
+// CHECK_TYPE_WITH_EXACT
+
+fun test() {
+    val buildee = build {
+        setTypeVariable(TargetType())
+        <!UPPER_BOUND_VIOLATION_IN_CONSTRAINT!>consumeDifferentTypeSubtype(getTypeVariable())<!>
+    }
+    // exact type equality check — turns unexpected compile-time behavior into red code
+    // considered to be non-user-reproducible code for the purposes of these tests
+    checkExactType<Buildee<TargetType>>(buildee)
+}
+
+
+
+
+class TargetType
+class DifferentType
+
+fun <T: <!FINAL_UPPER_BOUND!>DifferentType<!>> consumeDifferentTypeSubtype(value: T) {}
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    fun getTypeVariable(): TV = storage
+    private var storage: TV = null!!
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}