https://git.ruby-lang.org/ruby.git/commit/?id=69b5241c36

From 69b5241c360aa180550538dba1c7bf0a6cc8cc22 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=9C=E9=83=A8=E6=98=8C=E5=B9=B3?=
 <shyouhei@r...>
Date: Wed, 12 Aug 2020 09:52:12 +0900
Subject: ruby_debug_log: suppress warning

Old gcc (< 5 maybe?) warns that this variable is not initialized:

    debug.c: In function 'ruby_debug_log':
    debug.c:441:13: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
             if (r && len < MAX_DEBUG_LOG_MESSAGE_LEN) {
                 ^

I don't know if that is true, but adding "= 0" here must harm no one.

diff --git a/debug.c b/debug.c
index 205e985..1525231 100644
--- a/debug.c
+++ b/debug.c
@@ -380,7 +380,7 @@ ruby_debug_log(const char *file, int line, const char *func_name, const char *fm https://github.com/ruby/ruby/blob/trunk/debug.c#L380
 {
     char buff[MAX_DEBUG_LOG_MESSAGE_LEN] = {0};
     int len = 0;
-    int r;
+    int r = 0;
 
     // message title
     if (func_name && len < MAX_DEBUG_LOG_MESSAGE_LEN) {
-- 
cgit v0.10.2


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