diff --git a/platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/InjectedLanguageManagerImpl.java b/platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/InjectedLanguageManagerImpl.java
index 0fbc6ce60b8f..2f1c8dd29e84 100644
--- a/platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/InjectedLanguageManagerImpl.java
+++ b/platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/InjectedLanguageManagerImpl.java
@@ -188,7 +188,7 @@ public class InjectedLanguageManagerImpl extends InjectedLanguageManager impleme
       if (Thread.holdsLock(PsiLock.LOCK)) {
         // hack for the case when docCommit was called from within PSI modification, e.g. in formatter.
         // we can't spawn threads to do injections there, otherwise a deadlock is imminent
-        ContainerUtil.process(injected, commitProcessor);
+        ContainerUtil.process(new ArrayList<DocumentWindow>(injected), commitProcessor);
       }
       else {
         commitInjectionsRunnable.run();