thread panic when entering tree view

[deathtrip]

I'm running the git version from the AUR, and when i press 't' to enter tree view, i get this:

thread 'main' panicked at 'no entry found for key', src/components/processes.rs:441:37 note: run with RUST_BACKTRACE=1 environment variable to display a backtrace zsh: abort (core dumped) bb

And here's the stacktrace: `

            Stack trace of thread 94680:
            #0  0x00007ff0d5aac615 raise (libc.so.6 + 0x3d615)
            #1  0x00007ff0d5a95862 abort (libc.so.6 + 0x26862)
            #2  0x000055f45c6fad37 n/a (bb + 0x68d37)
            #3  0x000055f45c6fad26 n/a (bb + 0x68d26)
            #4  0x000055f45c703196 n/a (bb + 0x71196)
            #5  0x000055f45c7030fb n/a (bb + 0x710fb)
            #6  0x000055f45c71bf2a n/a (bb + 0x89f2a)
            #7  0x000055f45c71bef4 n/a (bb + 0x89ef4)
            #8  0x000055f45c71bead n/a (bb + 0x89ead)
            #9  0x000055f45c6eb010 n/a (bb + 0x59010)
            #10 0x000055f45c6f11a2 n/a (bb + 0x5f1a2)
            #11 0x000055f45c6d4f0f n/a (bb + 0x42f0f)
            #12 0x000055f45c6c5623 n/a (bb + 0x33623)
            #13 0x000055f45c6becd9 n/a (bb + 0x2ccd9)
            #14 0x000055f45c6df98e n/a (bb + 0x4d98e)
            #15 0x000055f45c6a1663 n/a (bb + 0xf663)
            #16 0x000055f45c6a32dd n/a (bb + 0x112dd)
            #17 0x000055f45c6e0e01 n/a (bb + 0x4ee01)
            #18 0x00007ff0d5a97152 __libc_start_main (libc.so.6 + 0x28152)
            #19 0x000055f45c69b06e n/a (bb + 0x906e)

            Stack trace of thread 94682:
            #0  0x00007ff0d5b7055c recv (libc.so.6 + 0x10155c)
            #1  0x000055f45c6a1779 n/a (bb + 0xf779)
            #2  0x000055f45c6a5efd n/a (bb + 0x13efd)
            #3  0x000055f45c721535 n/a (bb + 0x8f535)
            #4  0x00007ff0d5a563e9 start_thread (libpthread.so.0 + 0x93e9)
            #5  0x00007ff0d5b6f293 __clone (libc.so.6 + 0x100293)

            Stack trace of thread 94681:
            #0  0x00007ff0d5b5fefc __read (libc.so.6 + 0xf0efc)
            #1  0x000055f45c71e9f5 n/a (bb + 0x8c9f5)
            #2  0x000055f45c6b811c n/a (bb + 0x2611c)
            #3  0x000055f45c6a1639 n/a (bb + 0xf639)
            #4  0x000055f45c6a5db6 n/a (bb + 0x13db6)
            #5  0x000055f45c721535 n/a (bb + 0x8f535)
            #6  0x00007ff0d5a563e9 start_thread (libpthread.so.0 + 0x93e9)
            #7  0x00007ff0d5b6f293 __clone (libc.so.6 + 0x100293)`

Happens on bash and zsh, with multiple terminal emulators.

[epilys]

Hallo,

I'm running the git version from the AUR

I'm ignorant about AUR, does "git version" mean it's the git master?

[deathtrip]

Yes, the generated package is at commit a9eb29d, which is the most recent as of writing this.

[epilys]

And does this happen as soon as you launch the app without any filters/other active modes? Does this happen everytime?

[deathtrip]

Yep, happens everytime, even if all i do is press 't' after launch. Another panic i get is when i press 'F' to follow a process group: thread 'main' panicked at 'no entry found for key', src/components/processes.rs:1943:26

[epilys]

I'm wondering if there's anything "unexpected" in your system, anything that bb doesn't account for... process namespaces etc. Do you run containers or anything security related?

Regardless of this, I think the correct fix is not to use array Indexing for PIDs but do this all with Options.

[deathtrip]

I don't run containers. I have user namespaces disabled via kernel.unprivileged_userns_clone = 0 and also have hidepid=2 option on /proc. Can't think of anything else that could be causing this.

[epilys]

Could be hidepid=2 then 🤔. Thanks, I will try to push a fix asap.

[deathtrip]

It doesn't happen when /proc is not mounted with hidepid=2, so i guess that's it.