[tests] Add test data for KT-52838

compiler/testData/codegen/box/builderInference/issues/kt52838a.kt

@@ -0,0 +1,30 @@
+// ISSUE: KT-52838
+
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+fun box(): String {
+    build {
+        this as DerivedBuildee<*, *>
+        getTypeVariableA()
+        getTypeVariableB()
+    }
+    return "OK"
+}
+
+
+
+
+open class Buildee<TVA, TVB> {
+    fun getTypeVariableA(): TVA = storageA
+    fun getTypeVariableB(): TVB = storageB
+    private var storageA: TVA = Any() as TVA
+    private var storageB: TVB = Any() as TVB
+}
+
+class DerivedBuildee<TAA, TAB>: Buildee<TAA, TAB>()
+
+fun <PTVA, PTVB> build(instructions: Buildee<PTVA, PTVB>.() -> Unit): Buildee<PTVA, PTVB> {
+    return DerivedBuildee<PTVA, PTVB>().apply(instructions)
+}

compiler/testData/codegen/box/builderInference/issues/kt52838b.kt

@@ -0,0 +1,28 @@
+// ISSUE: KT-52838
+
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+fun box(): String {
+    build {
+        this as DerivedBuildee<*>
+        getTypeVariable()
+        getTypeVariable()
+    }
+    return "OK"
+}
+
+
+
+
+open class Buildee<TV> {
+    fun getTypeVariable(): TV = storage
+    private var storage: TV = Any() as TV
+}
+
+class DerivedBuildee<TA>: Buildee<TA>()
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return DerivedBuildee<PTV>().apply(instructions)
+}

compiler/testData/codegen/box/builderInference/issues/kt52838c.kt

@@ -0,0 +1,26 @@
+// ISSUE: KT-52838
+
+// IGNORE_BACKEND_K2: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+fun box(): String {
+    build {
+        this as DerivedBuildee<*>
+        getTypeVariable()
+    }
+    return "OK"
+}
+
+
+
+
+open class Buildee<TV> {
+    fun getTypeVariable(): TV = storage
+    private var storage: TV = Any() as TV
+}
+
+class DerivedBuildee<TA>: Buildee<TA>()
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return DerivedBuildee<PTV>().apply(instructions)
+}