https://git.ruby-lang.org/ruby.git/commit/?id=a137874e67

From a137874e67b0b3f815be3ba322ed8925860bc673 Mon Sep 17 00:00:00 2001
From: Koichi Sasada <ko1@a...>
Date: Tue, 1 Sep 2020 06:14:07 +0900
Subject: add RUBY_DEBUG=ci envval for GH actions

RUBY_DEBUG=ci envval shows more information on rb_bug().

diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index bafb4b3..c69f73e 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -25,6 +25,7 @@ jobs: https://github.com/ruby/ruby/blob/trunk/.github/workflows/ubuntu.yml#L25
       fail-fast: false
     env:
       GITPULLOPTIONS: --no-tags origin ${{github.ref}}
+      RUBY_DEBUG: ci
     runs-on: ${{ matrix.os }}
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     steps:
-- 
cgit v0.10.2


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