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-rw-r--r--contrib/tcsh/sh.lex.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/contrib/tcsh/sh.lex.c b/contrib/tcsh/sh.lex.c
index 0cccf47..8eccb4d 100644
--- a/contrib/tcsh/sh.lex.c
+++ b/contrib/tcsh/sh.lex.c
@@ -851,7 +851,8 @@ getsub(struct wordent *en)
return (en);
}
slhs.len = 0;
- Strbuf_append(&slhs, lhsb.s);
+ if (lhsb.s != NULL && lhsb.len != 0)
+ Strbuf_append(&slhs, lhsb.s);
Strbuf_terminate(&slhs);
if (exclc)
en = dosub(sc, en, global);
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