eval.c: preserve errinfo

* eval.c (rb_ensure): preserve errinfo accross ensure proc before
  JUMP_TAG().  [ruby-core:52022] [Bug #7802]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39156 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 25 insertions, 0 deletions

diff --git a/ext/-test-/exception/ensured.c b/ext/-test-/exception/ensured.c
new file mode 100644
index 0000000000..365e1f4f79
--- /dev/null
+++ b/ext/-test-/exception/ensured.c
@@ -0,0 +1,25 @@
+#include <ruby.h>
+
+static VALUE
+begin(VALUE object)
+{
+    return rb_funcall(object, rb_intern("try_method"), 0);
+}
+
+static VALUE
+ensure(VALUE object)
+{
+    return rb_funcall(object, rb_intern("ensured_method"), 0);
+}
+
+static VALUE
+ensured(VALUE module, VALUE object)
+{
+    return rb_ensure(begin, object, ensure, object);
+}
+
+void
+Init_ensured(VALUE klass)
+{
+    rb_define_module_function(klass, "ensured", ensured, 1);
+}