[FIR] Prohibit suspend anonymous functions in statement position

^KT-62018 Fixed
^KT-62019

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDataClassConverters.kt

@@ -1691,6 +1691,12 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.ANONYMOUS_SUSPEND_FUNCTION) { firDiagnostic ->
+        AnonymousSuspendFunctionImpl(
+            firDiagnostic as KtPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.VALUE_CLASS_NOT_TOP_LEVEL) { firDiagnostic ->
         ValueClassNotTopLevelImpl(
             firDiagnostic as KtPsiDiagnostic,

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnostics.kt

@@ -1220,6 +1220,10 @@ sealed interface KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         override val diagnosticClass get() = NoExplicitReturnTypeInApiModeWarning::class
     }
 
+    interface AnonymousSuspendFunction : KtFirDiagnostic<KtDeclaration> {
+        override val diagnosticClass get() = AnonymousSuspendFunction::class
+    }
+
     interface ValueClassNotTopLevel : KtFirDiagnostic<KtDeclaration> {
         override val diagnosticClass get() = ValueClassNotTopLevel::class
     }

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnosticsImpl.kt

@@ -1460,6 +1460,11 @@ internal class NoExplicitReturnTypeInApiModeWarningImpl(
     token: KtLifetimeToken,
 ) : KtAbstractFirDiagnostic<KtDeclaration>(firDiagnostic, token), KtFirDiagnostic.NoExplicitReturnTypeInApiModeWarning
 
+internal class AnonymousSuspendFunctionImpl(
+    firDiagnostic: KtPsiDiagnostic,
+    token: KtLifetimeToken,
+) : KtAbstractFirDiagnostic<KtDeclaration>(firDiagnostic, token), KtFirDiagnostic.AnonymousSuspendFunction
+
 internal class ValueClassNotTopLevelImpl(
     firDiagnostic: KtPsiDiagnostic,
     token: KtLifetimeToken,

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

@@ -2027,6 +2027,12 @@ public class DiagnosticCompilerTestFirTestdataTestGenerated extends AbstractDiag
                 runTest("compiler/fir/analysis-tests/testData/resolve/diagnostics/supertypeInitializedWithoutPrimaryConstructor.kt");
             }
 
+            @Test
+            @TestMetadata("suspendAnonymousFunction.kt")
+            public void testSuspendAnonymousFunction() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolve/diagnostics/suspendAnonymousFunction.kt");
+            }
+
             @Test
             @TestMetadata("testIllegalAnnotationClass.kt")
             public void testTestIllegalAnnotationClass() throws Exception {

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

@@ -2027,6 +2027,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFirTestDataTestGenerated
                 runTest("compiler/fir/analysis-tests/testData/resolve/diagnostics/supertypeInitializedWithoutPrimaryConstructor.kt");
             }
 
+            @Test
+            @TestMetadata("suspendAnonymousFunction.kt")
+            public void testSuspendAnonymousFunction() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolve/diagnostics/suspendAnonymousFunction.kt");
+            }
+
             @Test
             @TestMetadata("testIllegalAnnotationClass.kt")
             public void testTestIllegalAnnotationClass() throws Exception {