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-rw-r--r--common/stringop.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/common/stringop.c b/common/stringop.c
index 8af0d60f..709be684 100644
--- a/common/stringop.c
+++ b/common/stringop.c
@@ -258,6 +258,9 @@ int unescape_string(char *string) {
}
char *join_args(char **argv, int argc) {
+ if (!sway_assert(argc > 0, "argc should be positive")) {
+ return NULL;
+ }
int len = 0, i;
for (i = 0; i < argc; ++i) {
len += strlen(argv[i]) + 1;