py/qstr: Evaluate find_qstr only once then pass to Q_GET_HASH macro.

Q_GET_HASH may evaluate its argument more than once.
2019-02-19 23:44:01 +11:00 · 2019-02-19 23:44:01 +11:00 · 2b575418b6
commit 2b575418b6
parent a270cf280b
1 changed files with 2 additions and 1 deletions
--- a/py/qstr.c
+++ b/py/qstr.c
@ -251,7 +251,8 @@ qstr qstr_from_strn(const char *str, size_t len) {
 }

 mp_uint_t qstr_hash(qstr q) {
-    return Q_GET_HASH(find_qstr(q));
+    const byte *qd = find_qstr(q);
+    return Q_GET_HASH(qd);
 }

 size_t qstr_len(qstr q) {