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-rw-r--r--Src/params.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/Src/params.c b/Src/params.c
index 4767aaa34..0425e0700 100644
--- a/Src/params.c
+++ b/Src/params.c
@@ -1345,6 +1345,11 @@ getarg(char **str, int *inv, Value v, int a2, zlong *w,
 	    len = arrlen(ta);
 	    if (beg < 0)
 		beg += len;
+	    if (down) {
+		if (beg < 0)
+		    return 0;
+	    } else if (beg >= len)
+		return len + 1;
 	    if (beg >= 0 && beg < len) {
 		if (down) {
 		    if (!hasbeg)
@@ -1363,6 +1368,11 @@ getarg(char **str, int *inv, Value v, int a2, zlong *w,
 	    len = arrlen(ta);
 	    if (beg < 0)
 		beg += len;
+	    if (down) {
+		if (beg < 0)
+		    return 0;
+	    } else if (beg >= len)
+		return len + 1;
 	    if (beg >= 0 && beg < len) {
 		if (down) {
 		    if (!hasbeg)