tarantool / luajit / 8261350966

70%

tarantool/master: 93%

push

github

Fix recording of __concat metamethod.

Thanks to Sergey Kaplun.

(cherry picked from commit bcc5125a9)

`lj_record_ret()` uses `J->L->base` as a base for recording
concatenation with remaining operands, even if there is a vararg frame
or pcall frame (so it uses the wrong Lua stack slots from a frame
above). This leads to the corresponding assertion failure in the
`lj_record_mm_lookup()`.

This patch adds the calculation of the base adjusment necessary for
correct frame usage.

Sergey Kaplun:
* added the description and the test for the problem

Part of tarantool/tarantool#9595

Reviewed-by: Sergey Bronnikov <sergeyb@tarantool.org>
Reviewed-by: Maxim Kokryashkin <m.kokryashkin@tarantool.org>
Signed-off-by: Sergey Kaplun <skaplun@tarantool.org>
(cherry picked from commit 4a20956f8)

5640 of 5998 branches covered (94.03%)

Branch coverage included in aggregate %.

5 of 5 new or added lines in 1 file covered. (100.0%)

21503 of 23322 relevant lines covered (92.2%)

769739.02 hits per line