diff --git a/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebugSessionImpl.java b/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebugSessionImpl.java
index 55adb44cdd2a..b49be436ad4a 100644
--- a/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebugSessionImpl.java
+++ b/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebugSessionImpl.java
@@ -1032,7 +1032,9 @@ public final class XDebugSessionImpl implements XDebugSession {
     if (mySessionTab != null) {
       AppUIUtil.invokeOnEdt(() -> {
         mySessionTab.getUi().attractBy(XDebuggerUIConstants.LAYOUT_VIEW_FINISH_CONDITION);
-        ((XWatchesViewImpl)mySessionTab.getWatchesView()).updateSessionData();
+        if (!myProject.isDisposed()) {
+          ((XWatchesViewImpl)mySessionTab.getWatchesView()).updateSessionData();
+        }
         mySessionTab.detachFromSession();
       });
     }