[FIR] Fix crash on assignment expression with incorrect lvalue with LT mode

^KT-65241 Fixed

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java

@@ -13184,6 +13184,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
         runTest("compiler/testData/diagnostics/tests/exceptions/annotationWithWrongArgInDanglingModifierList.kt");
       }
 
+      @Test
+      @TestMetadata("assignmentWithIncorrectLValue.kt")
+      public void testAssignmentWithIncorrectLValue() {
+        runTest("compiler/testData/diagnostics/tests/exceptions/assignmentWithIncorrectLValue.kt");
+      }
+
       @Test
       @TestMetadata("expectedSomeTypesOnBranchForWhenExpressionOfErroneousType.kt")
       public void testExpectedSomeTypesOnBranchForWhenExpressionOfErroneousType() {

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java

@@ -13184,6 +13184,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
         runTest("compiler/testData/diagnostics/tests/exceptions/annotationWithWrongArgInDanglingModifierList.kt");
       }
 
+      @Test
+      @TestMetadata("assignmentWithIncorrectLValue.kt")
+      public void testAssignmentWithIncorrectLValue() {
+        runTest("compiler/testData/diagnostics/tests/exceptions/assignmentWithIncorrectLValue.kt");
+      }
+
       @Test
       @TestMetadata("expectedSomeTypesOnBranchForWhenExpressionOfErroneousType.kt")
       public void testExpectedSomeTypesOnBranchForWhenExpressionOfErroneousType() {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java

@@ -13178,6 +13178,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
         runTest("compiler/testData/diagnostics/tests/exceptions/annotationWithWrongArgInDanglingModifierList.kt");
       }
 
+      @Test
+      @TestMetadata("assignmentWithIncorrectLValue.kt")
+      public void testAssignmentWithIncorrectLValue() {
+        runTest("compiler/testData/diagnostics/tests/exceptions/assignmentWithIncorrectLValue.kt");
+      }
+
       @Test
       @TestMetadata("expectedSomeTypesOnBranchForWhenExpressionOfErroneousType.kt")
       public void testExpectedSomeTypesOnBranchForWhenExpressionOfErroneousType() {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java

@@ -13184,6 +13184,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
         runTest("compiler/testData/diagnostics/tests/exceptions/annotationWithWrongArgInDanglingModifierList.kt");
       }
 
+      @Test
+      @TestMetadata("assignmentWithIncorrectLValue.kt")
+      public void testAssignmentWithIncorrectLValue() {
+        runTest("compiler/testData/diagnostics/tests/exceptions/assignmentWithIncorrectLValue.kt");
+      }
+
       @Test
       @TestMetadata("expectedSomeTypesOnBranchForWhenExpressionOfErroneousType.kt")
       public void testExpectedSomeTypesOnBranchForWhenExpressionOfErroneousType() {

compiler/fir/raw-fir/light-tree2fir/src/org/jetbrains/kotlin/fir/lightTree/converter/LightTreeRawFirExpressionBuilder.kt

@@ -625,7 +625,7 @@ class LightTreeRawFirExpressionBuilder(
         }
 
         return result ?: buildErrorExpression {
-            source = null
+            source = dotQualifiedExpression.toFirSourceElement()
             diagnostic = ConeSyntaxDiagnostic("Qualified expression without selector")
 
             // if there is no selector, we still want to resolve the receiver

compiler/testData/diagnostics/tests/exceptions/assignmentWithIncorrectLValue.fir.kt

@@ -0,0 +1,7 @@
+// ISSUE: KT-65241
+
+object A
+
+fun test() {
+    A.<!SYNTAX!>else<!> = <!ASSIGNMENT_TYPE_MISMATCH!>42<!>
+}

compiler/testData/diagnostics/tests/exceptions/assignmentWithIncorrectLValue.kt

@@ -0,0 +1,7 @@
+// ISSUE: KT-65241
+
+object A
+
+fun test() {
+    A.<!SYNTAX!>else<!> = 42
+}

compiler/testData/integration/smoke/syntaxErrors/test.compile.expected

@@ -3,6 +3,9 @@ ERR:
 test.kt:4:13: error: classifier 'class System : Any' does not have a companion object, so it cannot be used as an expression.
     val s = System.in
             ^^^^^^
+test.kt:4:13: error: syntax error: Qualified expression without selector.
+    val s = System.in
+            ^^^^^^^^^
 test.kt:4:20: error: syntax error: Expecting an element.
     val s = System.in
                    ^^

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java

@@ -13184,6 +13184,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
         runTest("compiler/testData/diagnostics/tests/exceptions/annotationWithWrongArgInDanglingModifierList.kt");
       }
 
+      @Test
+      @TestMetadata("assignmentWithIncorrectLValue.kt")
+      public void testAssignmentWithIncorrectLValue() {
+        runTest("compiler/testData/diagnostics/tests/exceptions/assignmentWithIncorrectLValue.kt");
+      }
+
       @Test
       @TestMetadata("expectedSomeTypesOnBranchForWhenExpressionOfErroneousType.kt")
       public void testExpectedSomeTypesOnBranchForWhenExpressionOfErroneousType() {