https://git.ruby-lang.org/ruby.git/commit/?id=0a986b81e1

From 0a986b81e18bc3b4ed2a62b3679806194a49c0f3 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sat, 18 Apr 2020 21:30:53 +0900
Subject: Env values removed by ENV.clear are not used


diff --git a/hash.c b/hash.c
index 36b595b..e0f827b 100644
--- a/hash.c
+++ b/hash.c
@@ -5826,10 +5826,9 @@ rb_env_clear(void) https://github.com/ruby/ruby/blob/trunk/hash.c#L5826
 
     keys = env_keys(TRUE);
     for (i=0; i<RARRAY_LEN(keys); i++) {
-	VALUE val = rb_f_getenv(Qnil, RARRAY_AREF(keys, i));
-	if (!NIL_P(val)) {
-            env_delete(RARRAY_AREF(keys, i));
-	}
+        VALUE key = RARRAY_AREF(keys, i);
+        const char *nam = RSTRING_PTR(key);
+        ruby_setenv(nam, 0);
     }
     RB_GC_GUARD(keys);
     return envtbl;
-- 
cgit v0.10.2


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