[tests] Add test data for KT-49263

compiler/testData/codegen/box/builderInference/issues/kt49263.kt

@@ -0,0 +1,23 @@
+// ISSUE: KT-49263
+
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+fun box(): String {
+    buildPostponedTypeVariable {
+        consumeTargetType(this)
+    }
+    return "OK"
+}
+
+
+
+
+class TargetType
+
+fun consumeTargetType(value: TargetType) {}
+
+fun <PTV> buildPostponedTypeVariable(block: PTV.() -> Unit): PTV {
+    return (TargetType() as PTV).apply(block)
+}