1 files changed, 5 insertions, 0 deletions
diff --git a/js/src/jit/ScalarReplacement.cpp b/js/src/jit/ScalarReplacement.cpp
index be9ceee2e..2065c0371 100644
--- a/js/src/jit/ScalarReplacement.cpp
+++ b/js/src/jit/ScalarReplacement.cpp
@@ -795,6 +795,11 @@ IsArrayEscaped(MInstruction* ins)
         return true;
     }
 
+    if (obj->is<UnboxedArrayObject>()) {
+        JitSpew(JitSpew_Escape, "Template object is an unboxed plain object.");
+        return true;
+    }
+
     if (length >= 16) {
         JitSpew(JitSpew_Escape, "Array has too many elements");
         return true;