:wrench: Travis gcc warnings

diff --git a/ast b/ast
index c1588f9fd2323f4b12c5c9e755fcb1c3ec41d9eb..1b3f39e577d03ebeccaae77e27619dd3c96bf0bd 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit c1588f9fd2323f4b12c5c9e755fcb1c3ec41d9eb
+Subproject commit 1b3f39e577d03ebeccaae77e27619dd3c96bf0bd