Fix a reference counting bug

Ensure that the internal rep of interp->emptyObj is never
changed to a script, since scripts use emptyObj as the source
filename when no source info is available. Instead use a special
nullScriptObj for this purpose.

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 1 insertions, 0 deletions

diff --git a/jim.h b/jim.h
index 0204090..0f24a02 100644
--- a/jim.h
+++ b/jim.h
@@ -540,6 +540,7 @@ typedef struct Jim_Interp {
     Jim_Obj *liveList; /* Linked list of all the live objects. */
     Jim_Obj *freeList; /* Linked list of all the unused objects. */
     Jim_Obj *currentScriptObj; /* Script currently in execution. */
+    Jim_Obj *nullScriptObj; /* script representation of an empty string */
     Jim_Obj *emptyObj; /* Shared empty string object. */
     Jim_Obj *trueObj; /* Shared true int object. */
     Jim_Obj *falseObj; /* Shared false int object. */