https://git.ruby-lang.org/ruby.git/commit/?id=571ffcd609

From 571ffcd6094ccf1c68d4bfc36e425e0ee524e8b4 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Sat, 24 Aug 2019 20:31:16 +0900
Subject: ext/psych/yaml/api.c: Suppress a "variable set but not used" warning

```
compiling ../.././ext/psych/yaml/api.c
../.././ext/psych/yaml/api.c: In function 'yaml_document_delete':
../.././ext/psych/yaml/api.c:1122:7: warning: variable 'context' set but not used [-Wunused-but-set-variable]
     } context;
       ^~~~~~~
```
https://rubyci.org/logs/rubyci.s3.amazonaws.com/ubuntu1604/ruby-master/log/20190824T093004Z.log.html.gz

diff --git a/ext/psych/yaml/api.c b/ext/psych/yaml/api.c
index 03c1379..95dc6b4 100644
--- a/ext/psych/yaml/api.c
+++ b/ext/psych/yaml/api.c
@@ -1122,7 +1122,9 @@ yaml_document_delete(yaml_document_t *document) https://github.com/ruby/ruby/blob/trunk/ext/psych/yaml/api.c#L1122
     } context;
     yaml_tag_directive_t *tag_directive;
 
-    context.error = YAML_NO_ERROR;  /* Eliminate a compliler warning. */
+    /* Eliminate a compliler warning. */
+    context.error = YAML_NO_ERROR;
+    (void)context.error;
 
     assert(document);   /* Non-NULL document object is expected. */
 
-- 
cgit v0.10.2


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