https://git.ruby-lang.org/ruby.git/commit/?id=7563d542d6

From 7563d542d6c2bba5f5820f45b9707583aa28b136 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 23 Feb 2021 23:11:44 +0900
Subject: Use the system getenv in setup_debug_log

As ruby_set_debug_option() is called before ruby_sysinit(),
CRITICAL_SECTIONs are not initialized yet.
---
 debug.c       | 1 +
 win32/win32.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/debug.c b/debug.c
index 75d4cc6..e0ff948 100644
--- a/debug.c
+++ b/debug.c
@@ -263,6 +263,7 @@ ruby_set_debug_option(const char *str) https://github.com/ruby/ruby/blob/trunk/debug.c#L263
 }
 
 #if RUBY_DEVEL
+#undef getenv
 
 // RUBY_DEBUG_LOG features
 // See vm_debug.h comments for details.
diff --git a/win32/win32.c b/win32/win32.c
index bb7471f..9303a17 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -811,7 +811,6 @@ StartSockets(void) https://github.com/ruby/ruby/blob/trunk/win32/win32.c#L811
     InitializeCriticalSection(&select_mutex);
     InitializeCriticalSection(&socklist_mutex);
     InitializeCriticalSection(&conlist_mutex);
-    InitializeCriticalSection(&uenvarea_mutex);
 
     atexit(exit_handler);
 }
@@ -896,6 +895,7 @@ rb_w32_sysinit(int *argc, char ***argv) https://github.com/ruby/ruby/blob/trunk/win32/win32.c#L895
 #endif
     SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOGPFAULTERRORBOX);
 
+    InitializeCriticalSection(&uenvarea_mutex);
     get_version();
 
     //
-- 
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