stty, glibc 2.42: Cannot share speed * baud with GNU stty or uutils/stty built with old glibc

[oech3]

Read only variant for #8474.

$ glibc242-stty 50
$ glibc242-stty
speed 50 baud; line = 0;
-brkint -imaxbel iutf8 
$ gnu9.9-stty # needs any baud support
ispeed 38400 baud; ospeed 1 baud; line = 0;
-brkint -imaxbel iutf8
$ gnu9.9-stty 50
$ gnu9.9-stty
speed 50 baud; line = 0;
-brkint -imaxbel iutf8
$ glibc242-stty # cause panic

1 seems B50 of old glibc: rust-lang/libc#4692

[oech3]

@julian-klode Would you update Ubuntu patch to patch libc crate instead of stty and nix crate?

[oech3]

@ChrisDryden Can we use unsafe raw ioctl only for cfget*speed for mixing gnu9.9-stty 51 easily?

[ChrisDryden]

Is this issue still occurring with all of the recent fixes? I thought it was addressed?

[oech3]

Bumping libc crate fixed panic only for standard bauds. But gnu-stty 51 && uu-stty still panics.