3 files changed, 9 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index f5300123b..af447f81f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Jun 15 17:48:42 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* gc.c (os_obj_of): invoke garbage collection before iteration, to
+	  avoid accessing half recycled object references.  [ruby-dev:38613]
+
 Sat Jun 13 07:06:54 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* vm_eval.c (rb_f_catch): updated rdoc about generalized argument,
diff --git a/gc.c b/gc.c
index c9e9a520d..bcdc9af0b 100644
--- a/gc.c
+++ b/gc.c
@@ -85,6 +85,7 @@ void *alloca ();
 int ruby_gc_debug_indent = 0;
 
 #undef GC_DEBUG
+#define GC_DEBUG
 
 /* for GC profile */
 #define GC_PROFILE_MORE_DETAIL 0
@@ -266,7 +267,7 @@ typedef struct RVALUE {
 	struct RComplex complex;
     } as;
 #ifdef GC_DEBUG
-    char *file;
+    const char *file;
     int   line;
 #endif
 } RVALUE;
@@ -2164,6 +2165,7 @@ os_obj_of(rb_objspace_t *objspace, VALUE of)
     RVALUE *p, *pend;
     volatile VALUE v;
 
+    rb_garbage_collect();
     i = 0;
     while (i < heaps_used) {
         while (0 < i && (uintptr_t)membase < (uintptr_t)heaps[i-1].membase)
diff --git a/version.h b/version.h
index 70bebf44c..cd53f1347 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "1.9.1"
 #define RUBY_RELEASE_DATE "2009-05-22"
-#define RUBY_PATCHLEVEL 177
+#define RUBY_PATCHLEVEL 178
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 1