Fix possible access to fromspace in panic_unhandled_ex

MVM_debugserver_notify_unhandled_exception will actually enter the garbage collector, so the ex pointer may get outdated by that call.
MoarVM · Apr 23, 2020 · 49ac793 · 49ac793
1 parent 5f783ec
commit 49ac793
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/core/exceptions.c b/src/core/exceptions.c
@@ -667,7 +667,9 @@ static void panic_unhandled_ex(MVMThreadContext *tc, MVMException *ex) {
     char *backtrace;
 
     /* If a debug session is running, notify the client. */
-    MVM_debugserver_notify_unhandled_exception(tc, ex);
+    MVMROOT(tc, ex, {
+        MVM_debugserver_notify_unhandled_exception(tc, ex);
+    });
 
     /* If it's a control exception, try promoting it to a catch one; use
      * the category name. */