travis: downgrade temporarily due to asan issue

fixes #2912

diff --git a/.travis.yml b/.travis.yml
index 63f69ac860438bb508f214bbde48f0cae1a77ac2..de9ff3fcd43874b14130c356ae7a0b5778935ee7 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,8 @@
 sudo: false
 dist: trusty
+# TODO: remove “group” once trusty kernel is no longer affected by
+# https://github.com/google/sanitizers/issues/837
+group: deprecated-2017Q3
 services:
   - docker
 language: c