From: Yusuke Endoh <redmine@...>
Date: 2010-01-30T23:12:54+09:00
Subject: [ruby-core:27973] [Bug #2692] Ruby hangs after returning from rescue clause inside the block

Issue #2692 has been updated by Yusuke Endoh.

Category set to core
Assigned to set to Koichi Sasada
Priority changed from Normal to High

Hi Ilya --

2010/1/30 Ilya Lopatkin <redmine@ruby-lang.org>:
> def foo
>  some_block = -> do
>    0.upto(1000) do |i|
>      begin
>        raise Exception.new if i % 500 == 0
>      rescue Exception
>        return
>      end
>    end
>  end
>
>  some_block.call
> end
>
> foo
>
> VM hangs after return statement and can't be even interrupted via Ctrl+C.
> I've tried the latest snapshot and it behaves the same.


Good report!  Duplicated.
Here is a patch:


diff --git a/bootstraptest/test_jump.rb b/bootstraptest/test_jump.rb
index 7746733..bfb380e 100644
--- a/bootstraptest/test_jump.rb
+++ b/bootstraptest/test_jump.rb
@@ -259,3 +259,15 @@ assert_normal_exit %q{
     end
   end
 }
+
+assert_normal_exit %q{
+  -> do
+    1.times do
+      begin
+        raise
+      rescue
+        return
+      end
+    end
+  end.call
+}
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 54d54ff..ae1d86d 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -1491,7 +1491,7 @@ vm_throw(rb_thread_t *th, rb_control_frame_t *reg_cfp,
 				    dfp = cfp->dfp;
 				    goto valid_return;
 				}
-				tdfp = GC_GUARDED_PTR_REF((VALUE *)*dfp);
+				tdfp = GC_GUARDED_PTR_REF((VALUE *)*tdfp);
 			    }
 			}
 		    }

-- 
Yusuke ENDOH <mame@tsg.ne.jp>
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http://redmine.ruby-lang.org/issues/show/2692

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