Crash on invalid input

[lexxmark]

From sourceforge:

rpcalc___win_bison_2.5.23_crash.zip

The attached file is the first example in chapter 2 of the Bison manual with minor changes including at least one typo. Bison crashes while processing the file. I did not look that closely at the cause of the crash except to see that a NULL pointer was being accessed when it appeared that several functions were exiting. The win_bison program was invoked with no arguments besides the name of the file. The latest released version of win_bison, 2.5.23, was being used.

[GitMensch]

Do you investigate that (if yes adding the assignment here would be good)?
Do you know already if this is an upstream bug or not? if it is then it may be fixed in the development tree already (so we could pull that change), if it isn't fixed yet we should create bug report (much better: one including a patch).

[lexxmark]

I didn't investigate it yet. Going to look at all accumulated stuff later this week or next week.

[lexxmark]

I reproduced a crash and reported issue to GNU Bison project akimd/bison#54
I don't have linux to try it by myself.

[lexxmark]

The upstream bison project doesn't have such issue, I have outdated gnu lib source files.

I will update them next time I upgrade winflexbison.

[lexxmark]

this doesn't crash a new version https://github.com/lexxmark/winflexbison/files/5727962/win_flex_bison-2.5.24.zip

[lexxmark]

fixed in v2.5.24