tarantool / luajit / 7885429954

71%

tarantool/master: 93%

push

github

Fix recording of __concat metamethod.

Reported by Elias Oelschner. Analyzed by XmiliaH.

(cherry-picked from commit 3ee3c9cfa)

During the recording of `__concat` methametod, the `rec_mm_arith`
function overrides stack slots that are not restored for GC64
mode later after the call. This leads to a segmentation fault
later on. This patch fixes the issue by accounting for those
additional slots in the array used for restoring stack values.

Maxim Kokryashkin:
* added the description and the test for the problem

Part of tarantool/tarantool#9145

Reviewed-by: Sergey Bronnikov <sergeyb@tarantool.org>
Reviewed-by: Sergey Kaplun <skaplun@tarantool.org>
Signed-off-by: Igor Munkin <imun@tarantool.org>
(cherry picked from commit e1e5c0e98)

5423 of 6013 branches covered (90.19%)

Branch coverage included in aggregate %.

20758 of 23406 relevant lines covered (88.69%)

2802421.07 hits per line