drain info messages ahead of raising error

Author: bvogelzang

ext/tiny_tds/result.c

@@ -100,6 +100,17 @@ static void nogvl_cleanup(DBPROCESS *client) {
   */
   for (short int i = 0; i < userdata->nonblocking_errors_length; i++) {
     tinytds_errordata error = userdata->nonblocking_errors[i];
+
+    // lookahead to drain any info messages ahead of raising error
+    if (!error.is_message) {
+      for (short int j = i; j < userdata->nonblocking_errors_length; j++) {
+        tinytds_errordata msg_error = userdata->nonblocking_errors[j];
+        if (msg_error.is_message) {
+          rb_tinytds_raise_error(client, msg_error);
+        }
+      }
+    }
+
     rb_tinytds_raise_error(client, error);
   }