From 89b254a74ba3b64f98f8ad0727f5e420945664c1 Mon Sep 17 00:00:00 2001
From: Daniel van Vugt <daniel.van.vugt@canonical.com>
Date: Wed, 30 Nov 2022 17:32:14 +0800
Subject: [PATCH] gles3: Ensure missing_extensions is always populated

This appears to be the only explanation for `init_secondary_gpu_data_gpu`
crashing in `g_strjoinv`, but I don't know the exact conditions causing
`glGetString (GL_EXTENSIONS)` to return NULL.

https://launchpad.net/bugs/1994011

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2674>
---
 src/backends/meta-gles3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backends/meta-gles3.c b/src/backends/meta-gles3.c
index 727b3c125..23a024b14 100644
--- a/src/backends/meta-gles3.c
+++ b/src/backends/meta-gles3.c
@@ -127,7 +127,7 @@ meta_gles3_has_extensions (MetaGles3    *gles3,
   if (!extensions_str)
     {
       g_warning ("Failed to get string: %s", get_gl_error_str (glGetError ()));
-      return FALSE;
+      extensions_str = "";
     }
 
   va_start (var_args, first_extension);