py/mpz.c: Fix bug with shl not truncating zero digits correctly.

10 years ago · f66ee4dfd7
1 changed files with 1 additions and 1 deletions
--- a/py/mpz.c
+++ b/py/mpz.c
@ -97,7 +97,7 @@ STATIC mp_uint_t mpn_shl(mpz_dig_t *idig, mpz_dig_t *jdig, mp_uint_t jlen, mp_ui

    // work out length of result
    jlen += n_whole;
-    if (idig[jlen - 1] == 0) {
+    while (jlen != 0 && idig[jlen - 1] == 0) {
        jlen--;
    }