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-rw-r--r--Src/params.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/Src/params.c b/Src/params.c
index b8e0c429b..64c78bd63 100644
--- a/Src/params.c
+++ b/Src/params.c
@@ -1260,7 +1260,8 @@ getarg(char **str, int *inv, Value v, int a2, zlong *w,
     if (ishash && (keymatch || !rev))
 	remnulargs(s);
     if (needtok) {
-	if (parsestr(s))
+	s = dupstring(s);
+	if (parsestr(&s))
 	    return 0;
 	singsub(&s);
     } else if (rev)