merges r25290 from trunk into ruby_1_9_1.

--
* file.c (path_check_0): prevent from GC.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@26478 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/file.c b/file.c
index 3a023561ef..553919a574 100644
--- a/file.c
+++ b/file.c
@@ -4405,7 +4405,8 @@ path_check_0(VALUE path, int execpath)
 
 	rb_str_cat2(newpath, "/");
 	rb_str_cat2(newpath, p0);
-	p0 = RSTRING_PTR(path = newpath);
+        path = newpath;
+	p0 = RSTRING_PTR(newpath);
     }
     for (;;) {
 #ifndef S_IWOTH
@@ -4419,6 +4420,7 @@ path_check_0(VALUE path, int execpath)
 	    rb_warn("Insecure world writable dir %s in %sPATH, mode 0%o",
 		    p0, (execpath ? "" : "LOAD_"), st.st_mode);
 	    if (p) *p = '/';
+            RB_GC_GUARD(path);
 	    return 0;
 	}
 	s = strrdirsep(p0);