Segfault when $TERM is unset on Linux

[hosiet]

Describe the bug

$ env -u TERM cmatrix -f
Segmentation fault

To Reproduce
See above.

Expected behavior
Program should not crash, or it should give a clear explanation before exiting gracefully.

• OS: Debian 12

Additional context
Downstream bug report: https://bugs.debian.org/715743

[hosiet]

Referencing https://bugs.debian.org/715743#27:

I believe the culrpit is this line:

if (force && strcmp("linux", getenv("TERM"))) {

If getenv() returns NULL, then strcmp() crashes.

[AliHj98]

Also getting segmentation fault after a few seconds

compiling on windows 11 with WSL

[o0nd7ots]

I get the segfault instantly.

However you are using -f Force the linux $TERM type to be on so I think this is kind of a strech.

Here is what gets returned without -f:

$ env -u TERM cmatrix
Error opening terminal: unknown.