[PATCH v3 4/4] restore_env(): free the saved environment variable once we are done

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Just like we free orig_cwd, which is the value of the original
working directory saved in save_env_before_alias(), once we are
done with it, the contents of orig_env[] array, saved in the
save_env_before_alias() function should be freed; otherwise,
the second and subsequent calls to save/restore pair will leak
the memory allocated in save_env_before_alias().

Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---

 * This is new.

 git.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/git.c b/git.c
index 1cbe267..93f569d 100644
--- a/git.c
+++ b/git.c
@@ -54,10 +54,12 @@ static void restore_env(int external_alias)
 		if (external_alias &&
 		    !strcmp(env_names[i], GIT_PREFIX_ENVIRONMENT))
 			continue;
-		if (orig_env[i])
+		if (orig_env[i]) {
 			setenv(env_names[i], orig_env[i], 1);
-		else
+			free(orig_env[i]);
+		} else {
 			unsetenv(env_names[i]);
+		}
 	}
 }
 
-- 
2.7.0-391-gcd29568

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