[Orangeair]

It's a long standing bug, setenv and unsetenv are not thread-safe

https://www.evanjones.ca/setenv-is-not-thread-safe.html

[robertlagrant]

I honestly think using setenv is just a terrible idea.

[ak_111]

can you elaborate what is the simpelist alternative?

[darthwalsh]

Simple, you don't set any env vars after starting new threads