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diff --git a/bin/sh/alias.c b/bin/sh/alias.c
--- a/bin/sh/alias.c
+++ b/bin/sh/alias.c
@@ -204,6 +204,11 @@
return (0);
}
while ((n = *argptr++) != NULL) {
+ if (n[0] == '\0') {
+ warning("'': not found");
+ ret = 1;
+ continue;
+ }
if ((v = strchr(n+1, '=')) == NULL) /* n+1: funny ksh stuff */
if ((ap = lookupalias(n, 0)) == NULL) {
warning("%s: not found", n);

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