Global initialization checks name conflict

Initialization "global a = 10" raises an error if global 'a' is already
defined, that is, it has a non-nil value.

1 files changed, 1 insertions, 0 deletions

diff --git a/lopnames.h b/lopnames.h
index aa7bea77..0554a2e9 100644
--- a/lopnames.h
+++ b/lopnames.h
@@ -95,6 +95,7 @@ static const char *const opnames[] = {
   "CLOSURE",
   "VARARG",
   "GETVARG",
+  "ERRNNIL",
   "VARARGPREP",
   "EXTRAARG",
   NULL