From 14e1992ed0c1b1244bc0c802fae8fe3cd88e848f Mon Sep 17 00:00:00 2001
From: Akira Yumiyama <yumiyama.akira@gmail.com>
Date: Sun, 12 May 2013 14:15:00 +0900
Subject: add null check

---
 src/file.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/file.c b/src/file.c
index f90204585..02991eb98 100644
--- a/src/file.c
+++ b/src/file.c
@@ -250,6 +250,10 @@ mrb_file__gethome(mrb_state *mrb, mrb_value klass)
     }
   }
 
+  if (home == NULL) {
+    return mrb_nil_value();
+  }
+
   if (!mrb_file_is_absolute_path(home)) {
     if (argc && strlen(cuser) > 0) {
       mrb_raisef(mrb, E_ARGUMENT_ERROR, "non-absolute home of ~%s", cuser);
-- 
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