thread.c: deadlock in backtrace

* thread.c (unblock_function_set): check interrupts just once
  during raising exceptions, as they are deferred since r16651.
  [ruby-core:85939] [Bug #14577]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62673 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/thread.c b/thread.c
index 2c06127292..ea0f526d2e 100644
--- a/thread.c
+++ b/thread.c
@@ -428,7 +428,7 @@ unblock_function_set(rb_thread_t *th, rb_unblock_function_t *func, void *arg, in
 	}
 
         rb_native_mutex_lock(&th->interrupt_lock);
-    } while (RUBY_VM_INTERRUPTED_ANY(th->ec) &&
+    } while (!th->ec->raised_flag && RUBY_VM_INTERRUPTED_ANY(th->ec) &&
              (rb_native_mutex_unlock(&th->interrupt_lock), TRUE));
 
     VM_ASSERT(th->unblock.func == NULL);