bisect 4

Author: benma

src/modules/schnorrsig/tests_impl.h

@@ -1009,9 +1009,13 @@ void test_s2c_opening(void) {
         /* This is expected to fail in about 50% of iterations because the
          * points' x-coordinates are uniformly random */
         if (secp256k1_schnorrsig_s2c_opening_parse(CTX, &opening, input) == 1) {
-            CHECK(secp256k1_schnorrsig_s2c_opening_serialize(CTX, output, &opening) == 1);
-            CHECK(memcmp(output, input, sizeof(output)) == 0);
+
         }
+        testrand256(&input[1]);
+        /* Set pubkey oddness tag to first bit of input[1] */
+        input[0] = (input[1] & 1) + 2;
+        /* Set nonce_is_negated bit to input[1]'s 3rd bit */
+        input[0] |= (input[1] & (1 << 2));
         i++;
     } while(i < COUNT);
 }