Make travis show the ./tests seed by removing stdout buffering and always cat tests.log after a travis run.

.travis.yml

@@ -94,3 +94,7 @@ script:
    travis_wait 30 valgrind --error-exitcode=42 ./tests 16 &&
    travis_wait 30 valgrind --error-exitcode=42 ./exhaustive_tests;
    fi
+
+after_script:
+    - cat ./tests.log
+    - cat ./exhaustive_tests.log

src/tests.c

@@ -5169,6 +5169,12 @@ void run_ecdsa_openssl(void) {
 int main(int argc, char **argv) {
     unsigned char seed16[16] = {0};
     unsigned char run32[32] = {0};
+
+    /* Disable buffering for stdout to improve reliability of getting
+     * diagnostic information. Happens right at the start of main because
+     * setbuf must be used before any other operation on the stream. */
+    setbuf(stdout, NULL);
+
     /* find iteration count */
     if (argc > 1) {
         count = strtol(argv[1], NULL, 0);