I use CentOS 7 with flex 2.5.37 quite extensively have never come across a psql crash. This seems more like an environment related issue on your system.
On Tue, Mar 2, 2021 at 1:53 PM walker <faila...@qq.com> wrote: > hi > > During installation from source code, there are many crashes for psql > while executing core regression tests, all the crashes are similar, the > backtrace info as follows: > > Core was generated by 'psql'. > Program terminated with signal 11, Segmentation fault. > # 0 0x000000000043f140 in slash_yylex() > (gdb) bt > #0 0x000000000043f140 in slash_yylex() > #1 0x00000000004430fc in psql_scan_slash_command() > #2 0x000000000043f140 in HandleSlashCmds() > #3 0x000000000043f140 in MainLoop() > #4 0x000000000043f140 in main() > > I did more compared testing about this scenario, as follows: > 1. install from local source code(xxx.tar.gz) > 1) switch to source tree directory, and build there ---- no crash > generated > 2) create a build directory, and build there ---- no crash generated > > 2. install from git source code > 1) switch to source tree directory, and build there ---- no crash generated > 2) create a build directory, and build there ---- many crashes generated, > but if install newer version of flex, e.g. 2.6.4, the problem doesn't > exist. Any suggestions about this behavior? > > NOTES: > test commands are same, as follows: > configure --enable-coverage --enable-tap-tests > make > make check > > testing environment: > PostgreSQL: 13.2 > redhat 7.4, 3.10.0-693.e17.x86_64 > flex: 2.5.37 > > thanks > walker >
