From 213ec4769695d78c601e15d381e0c4fa60d86858 Mon Sep 17 00:00:00 2001
From: Martin Edenhofer <me@edenhofer.de>
Date: Tue, 3 Apr 2018 01:40:49 +0200
Subject: [PATCH] Update gem --system to work on travis environment.

---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 412e8a2d4..89dd94884 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -45,7 +45,7 @@ language: ruby
 rvm:
   - 2.4.4
 before_install:
-  - gem update
+  - gem update --system # Due to: https://github.com/travis-ci/travis-ci/issues/8978
   - git fetch --unshallow
   - if [ "${DB}" = "mysql" ]; then mysql -u root -e "CREATE USER 'some_user'@'localhost' IDENTIFIED BY 'some_pass';"; fi
   - if [ "${DB}" = "mysql" ]; then mysql -u root -e "GRANT ALL PRIVILEGES ON *.* TO 'some_user'@'localhost';"; fi