Introduce FirInitializerTypeMismatchChecker

compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.fir.kt

@@ -10,7 +10,8 @@ package testsCase1
 
 class Case() {
     fun case(v: V) {
-        val va: () -> String = (V)::a
+        // InitializertTypeCheckerMismatch bug
+        val va: () -> String = <!INITIALIZER_TYPE_MISMATCH!>(V)::a<!>
 
         val vb: () -> String = (V)::b
 

compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.fir.kt

@@ -4,32 +4,32 @@
 
 // TESTCASE NUMBER: 1
 fun case_1() {
-    val x: Int = null
+    val x: Int = <!INITIALIZER_TYPE_MISMATCH!>null<!>
 }
 
 // TESTCASE NUMBER: 2
 fun case_2() {
-    val x: Any = null
+    val x: Any = <!INITIALIZER_TYPE_MISMATCH!>null<!>
 }
 
 // TESTCASE NUMBER: 3
 fun case_3() {
-    val x: Nothing = null
+    val x: Nothing = <!INITIALIZER_TYPE_MISMATCH!>null<!>
 }
 
 // TESTCASE NUMBER: 4
 fun case_4() {
-    var x: Int = null
+    var x: Int = <!INITIALIZER_TYPE_MISMATCH!>null<!>
 }
 
 // TESTCASE NUMBER: 5
 fun case_5() {
-    var x: Any = null
+    var x: Any = <!INITIALIZER_TYPE_MISMATCH!>null<!>
 }
 
 // TESTCASE NUMBER: 6
 fun case_6() {
-    var x: Nothing = null
+    var x: Nothing = <!INITIALIZER_TYPE_MISMATCH!>null<!>
 }
 
 // TESTCASE NUMBER: 7
@@ -47,7 +47,7 @@ fun case_8() {
 // TESTCASE NUMBER: 9
 fun case_9() {
     val x = null
-    val y: Int = x
+    val y: Int = <!INITIALIZER_TYPE_MISMATCH!>x<!>
 }
 
 // TESTCASE NUMBER: 10