Implement (failing) test for FIR IC - as in KT-49750

jps-plugin/testData/incremental/classHierarchyAffected/withIntermediateBodiesChanged/DirectInter.kt

@@ -0,0 +1,3 @@
+package foo
+
+open class DirectInter : DirectBase()

jps-plugin/testData/incremental/classHierarchyAffected/withIntermediateBodiesChanged/ReverseInter.kt

@@ -0,0 +1,3 @@
+package foo
+
+open class ReverseInter : ReverseBase()

jps-plugin/testData/incremental/classHierarchyAffected/withIntermediateBodiesChanged/build.log

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+================ Step #1 =================
+
+Cleaning output files:
+End of files
+Compiling files:
+  src/direct.kt
+End of files
+Exit code: OK
+
+================ Step #2 =================
+
+Cleaning output files:
+End of files
+Compiling files:
+  src/reverse.kt
+End of files
+Exit code: OK
+------------------------------------------

jps-plugin/testData/incremental/classHierarchyAffected/withIntermediateBodiesChanged/direct.kt

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+package foo
+
+open class DirectBase {
+    open val x get() = 0
+}
+
+class DirectChild : DirectInter()

jps-plugin/testData/incremental/classHierarchyAffected/withIntermediateBodiesChanged/direct.kt.new.1

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+package foo
+
+// order is important, see KT-49750
+
+open class DirectBase {
+    open val x get() = 1
+}
+
+class DirectChild : DirectInter() {
+    override val x get() = 3
+}

jps-plugin/testData/incremental/classHierarchyAffected/withIntermediateBodiesChanged/reverse.kt

@@ -0,0 +1,7 @@
+package foo
+
+class ReverseChild : ReverseInter()
+
+open class ReverseBase {
+    open val x get() = 0
+}

jps-plugin/testData/incremental/classHierarchyAffected/withIntermediateBodiesChanged/reverse.kt.new.2

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+package foo
+
+// order is important, see KT-49750
+
+class ReverseChild : ReverseInter() {
+   override val x get() = 5
+}
+
+open class ReverseBase {
+    open val x get() = 2
+}