[tests] Add test data for KT-53553

compiler/testData/diagnostics/tests/builderInference/issues/kt53553.fir.kt

@@ -0,0 +1,35 @@
+// ISSUE: KT-53553
+// CHECK_TYPE_WITH_EXACT
+
+fun test() {
+    val buildee = parallelBuild(
+        {
+            consumeTargetTypeBase(it)
+        },
+        {
+            consumeTargetType(it)
+        }
+    )
+    // 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>>(<!ARGUMENT_TYPE_MISMATCH("Buildee<TargetType>; Buildee<TargetTypeBase>")!>buildee<!>)
+}
+
+
+
+
+open class TargetTypeBase
+class TargetType: TargetTypeBase()
+
+fun consumeTargetTypeBase(value: TargetTypeBase) {}
+
+fun consumeTargetType(value: TargetType) {}
+
+class Buildee<TV>
+
+fun <PTV> parallelBuild(
+    instructionsA: Buildee<PTV>.(PTV) -> Unit,
+    instructionsB: Buildee<PTV>.(PTV) -> Unit
+): Buildee<PTV> {
+    return null!!
+}

compiler/testData/diagnostics/tests/builderInference/issues/kt53553.kt

@@ -0,0 +1,35 @@
+// ISSUE: KT-53553
+// CHECK_TYPE_WITH_EXACT
+
+fun test() {
+    val buildee = parallelBuild(
+        <!BUILDER_INFERENCE_MULTI_LAMBDA_RESTRICTION!>{
+            consumeTargetTypeBase(it)
+        }<!>,
+        <!BUILDER_INFERENCE_MULTI_LAMBDA_RESTRICTION!>{
+            consumeTargetType(it)
+        }<!>
+    )
+    // 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>>(<!TYPE_MISMATCH("Buildee<TargetType>; Buildee<TargetTypeBase>"), TYPE_MISMATCH("Buildee<TargetTypeBase>; Buildee<TargetType>")!>buildee<!>)
+}
+
+
+
+
+open class TargetTypeBase
+class TargetType: TargetTypeBase()
+
+fun consumeTargetTypeBase(value: TargetTypeBase) {}
+
+fun consumeTargetType(value: TargetType) {}
+
+class Buildee<TV>
+
+fun <PTV> parallelBuild(
+    instructionsA: Buildee<PTV>.(PTV) -> Unit,
+    instructionsB: Buildee<PTV>.(PTV) -> Unit
+): Buildee<PTV> {
+    return null!!
+}