vm_insnhelper.c: break in once

* vm_insnhelper.c (vm_throw_start): size of catch table has been
  included in iseq_catch_table struct, which could be NULL, since
  2.2.  e.g., proc-closure in `once'.
  [ruby-core:81775] [Bug #13680]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59181 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 0 deletions

diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index 6955118de7..ecbf042e49 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -1080,4 +1080,15 @@ $stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
       }
     end;
   end
+
+  def test_break_in_once
+    assert_separately([], "#{<<-"begin;"}\n#{<<~'end;'}")
+    begin;
+      obj = Object.new
+      def obj.try
+        /#{break}/o
+      end
+      assert_raise(LocalJumpError, /proc-closure/) {obj.try}
+    end;
+  end
 end