tree-wide: introduce strerror_safe()

src/core/execute.c

@@ -4891,7 +4891,7 @@ static void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
         cmd = exec_command_line(c->argv);
         fprintf(f,
                 "%sCommand Line: %s\n",
-                prefix, cmd ? cmd : strerror(ENOMEM));
+                prefix, cmd ? cmd : strerror_safe(ENOMEM));
 
         exec_status_dump(&c->exec_status, f, prefix2);
 }