From 86210e4506d070dcfbabd8bc992a4babe3cf8426 Mon Sep 17 00:00:00 2001
From: Bas Leijdekkers <bas.leijdekkers@jetbrains.com>
Date: Fri, 26 Sep 2025 16:32:48 +0200
Subject: [PATCH] Java: avoid exception and broken code in compact source file
 (IDEA-379938)

GitOrigin-RevId: b0846f84f6830ce49bcf0ab5974e864c8d41f75b
---
 ...AddExceptionFromFieldInitializerToConstructorThrowsFix.java | 3 ++-
 .../quickFix/addToConstructorThrows/beforeImplicitClass.java   | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)
 create mode 100644 java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addToConstructorThrows/beforeImplicitClass.java

diff --git a/java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/AddExceptionFromFieldInitializerToConstructorThrowsFix.java b/java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/AddExceptionFromFieldInitializerToConstructorThrowsFix.java
index de385493ca1a..588573fa0046 100644
--- a/java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/AddExceptionFromFieldInitializerToConstructorThrowsFix.java
+++ b/java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/AddExceptionFromFieldInitializerToConstructorThrowsFix.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+// Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.codeInsight.daemon.impl.quickfix;
 
 import com.intellij.codeInsight.ExceptionUtil;
@@ -37,6 +37,7 @@ public final class AddExceptionFromFieldInitializerToConstructorThrowsFix extend
     final PsiClass containingClass = field.getContainingClass();
     if (containingClass == null ||
         containingClass instanceof PsiAnonymousClass ||
+        containingClass instanceof PsiImplicitClass ||
         containingClass.isInterface()) {
       return null;
     }
diff --git a/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addToConstructorThrows/beforeImplicitClass.java b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addToConstructorThrows/beforeImplicitClass.java
new file mode 100644
index 000000000000..686c4f7935ac
--- /dev/null
+++ b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addToConstructorThrows/beforeImplicitClass.java
@@ -0,0 +1,3 @@
+// "Add exception to constructor signature" "false"
+
+java.io.FileWriter fw = new java.io.File<caret>Writer("sunshine");