FIR checker: report val reassignment

compiler/testData/diagnostics/testsWithStdLib/contracts/controlflow/initialization/exactlyOnce/valDefiniteReassignment.fir.kt

@@ -1,28 +0,0 @@
-// !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
-// !DIAGNOSTICS: -INVISIBLE_REFERENCE -INVISIBLE_MEMBER
-
-import kotlin.contracts.*
-
-fun <T> myRun(block: () -> T): T {
-    contract {
-        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
-    }
-    return block()
-}
-
-fun reassignmentInUsualFlow() {
-    val x: Int
-    myRun { x = 42 }
-    x = 43
-    x.inc()
-}
-
-fun reassignment() {
-    val x = 42
-    myRun {
-        x = 43
-    }
-    x.inc()
-}
-

compiler/testData/diagnostics/testsWithStdLib/contracts/controlflow/initialization/exactlyOnce/valDefiniteReassignment.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
 // !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
 // !DIAGNOSTICS: -INVISIBLE_REFERENCE -INVISIBLE_MEMBER

compiler/testData/diagnostics/testsWithStdLib/contracts/controlflow/initialization/exactlyOnce/valIndefiniteInitialization.fir.kt

@@ -24,7 +24,7 @@ fun branchingIndetermineFlow(a: Any?) {
     if (a is String) {
         myRepeat(a.length) {
             // Val reassignment because we know that repeat's lambda called in-place
-            myRun { x = 42 }
+            myRun { <!VAL_REASSIGNMENT!>x<!> = 42 }
         }
     }
     else {
@@ -45,7 +45,7 @@ fun multipleAssignments() {
     val x: Int
     myRepeat(42) {
         // Val reassignment because we know that repeat's lambda called in-place
-        myRun { x = 42 }
+        myRun { <!VAL_REASSIGNMENT!>x<!> = 42 }
     }
     <!UNINITIALIZED_VARIABLE!>x<!>.inc()
 }