From 0a0427afbbbdc40b87d3b69fad56f091cae89ff3 Mon Sep 17 00:00:00 2001
From: Rangi <35663410+Rangi42@users.noreply.github.com>
Date: Fri, 5 Mar 2021 08:27:12 -0800
Subject: [PATCH] windows-xbuild CI uses ubuntu-18.04 for its gcc 7.3.0 (#784)

GitHub's ubuntu-18.04 environment installs gcc 7.3.0.
The latest ubuntu-20.04 environment installs gcc 9.3.0.
Version 9.3.0 is incompatible with building libpng 1.6.37,
as of 2021-03-04.

Fixes #783
---
 .github/workflows/testing.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index f27ae9e3..997b3567 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -133,7 +133,7 @@ jobs:
     strategy:
       matrix:
         bits: [32, 64]
-        os: [ubuntu-latest]
+        os: [ubuntu-18.04]
         include:
           - bits: 32
             arch: i686