merges r20291 from trunk into ruby_1_9_1.

* vm.c (thread_free): th->vm may be NULL when pthread_create
  failed for ENOMEM.  [ruby-dev:37095]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@20322 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 6 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 9b577ea6d..4c50fb904 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Nov 21 16:06:54 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* vm.c (thread_free): th->vm may be NULL when pthread_create
+	  failed for ENOMEM.  [ruby-dev:37095]
+
 Thu Nov 20 07:33:15 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* lib/logger.rb (Logger): should handle the case that cvs/svn do
diff --git a/vm.c b/vm.c
index 5bf684237..2bb050d19 100644
--- a/vm.c
+++ b/vm.c
@@ -1486,7 +1486,7 @@ thread_free(void *ptr)
 	}
 #endif
 
-	if (th->vm->main_thread == th) {
+	if (th->vm && th->vm->main_thread == th) {
 	    RUBY_GC_INFO("main thread\n");
 	}
 	else {