[compiler] Properly validate stable map assumption for globals.

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index a03b6ccf683202366b85af41a92ec0f7aaaa915a..17d51687da01c3e845193e30c06a6c18a9aaf482 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -254,6 +254,7 @@ namespace internal {
   V(kUnexpectedReturnFromThrow, "Unexpectedly returned from a throw")          \
   V(kUnsupportedSwitchStatement, "Unsupported switch statement")               \
   V(kUnsupportedTaggedImmediate, "Unsupported tagged immediate")               \
+  V(kUnstableConstantTypeHeapObject, "Unstable constant-type heap object")     \
   V(kVariableResolvedToWithContext, "Variable resolved to with context")       \
   V(kWeShouldNotHaveAnEmptyLexicalContext,                                     \
     "We should not have an empty lexical context")                             \