fix raise in exception with jump

add_ensure_iseq() adds ensure block to the end of
jump such as next/redo/return. However, if the rescue
cause are in the body, this rescue catches the exception
in ensure clause.

  iter do
    next
  rescue
    R
  ensure
    raise
  end

In this case, R should not be executed, but executed without this patch.

Fixes [Bug #13930]
Fixes [Bug #16618]

A part of tests are written by @jeremyevans https://github.com/ruby/ruby/pull/4291

1 files changed, 1 insertions, 0 deletions

diff --git a/iseq.h b/iseq.h
index 6a6c69a114..904b891427 100644
--- a/iseq.h
+++ b/iseq.h
@@ -101,6 +101,7 @@ struct iseq_compile_data {
       struct iseq_compile_data_storage *storage_head;
       struct iseq_compile_data_storage *storage_current;
     } insn;
+    bool in_rescue;
     int loopval_popped;	/* used by NODE_BREAK */
     int last_line;
     int label_no;