From c3ba321e6ad17af7f2faad66a525eea8a338b9f1 Mon Sep 17 00:00:00 2001
From: Duncan Stuart <dgmstuart@gmail.com>
Date: Wed, 7 Aug 2019 13:56:22 +0200
Subject: [PATCH] JRuby 9.1 build runs on a compatible JDK

The latest travis build distribution has a default java version of 11,
which is incompatible with this version of JRuby.

Specifying a compatible JDK version enables this JRuby to build
successfully.
---
 .travis.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.travis.yml b/.travis.yml
index 2d8fc1b..26871d8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,7 @@ matrix:
     - rvm: jruby-9.1.8.0
       env:
         - JRUBY_OPTS="--debug"
+      jdk: openjdk8
     - rvm: jruby-9.2.7.0
       env:
         - JRUBY_OPTS="--debug"