[Bug 2097317] Re: bpftrace: error while loading shared libraries: libLLVM-18.so.18.1: cannot open shared object file: No such file or directory

[Mate Kukri]

The debug counter crash is likely the same as
https://bugs.launchpad.net/ubuntu/+source/bpftrace/+bug/2086104.

Afaik this version of bpftrace has a linking issue against LLVM where it
sometimes pulls in a static and a shared copy into the same process and
when the versions mismatch it fails.

There is a hacky patch that I SRUd to Oracular above, and we fixed it
properly upstream here: https://github.com/bpftrace/bpftrace/pull/3580

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https://bugs.launchpad.net/bugs/2097317

Title:
  bpftrace: error while loading shared libraries: libLLVM-18.so.18.1:
  cannot open shared object file: No such file or directory

Status in bpftrace package in Ubuntu:
  Confirmed
Status in bpftrace source package in Noble:
  Fix Committed

Bug description:
  [impact]
  bpftrace 0.20.2-1ubuntu4.2 is broken with the version of llvm-toolchain-18 in noble-updates:

  Regression from https://bugs.launchpad.net/ubuntu/+source/bpftrace/+bug/2081848
  root at nsnx2:~# bpftrace
  bpftrace: error while loading shared libraries: libLLVM-18.so.18.1: cannot open shared object file: No such file or directory

  [test plan]
  bpftrace runs tests during build which verifies _something_ but also we should install bpftrace on a system that has no other packages from proposed run a simple command such as "sudo bpftrace -e 'kprobe:do_nanosleep { printf("%d sleeping\n", pid); }'".

  [regression potential]
  It is still possible that rebuilding bpftrace is not safe because of some other change in the archive since release. The tests should catch most of these, but if there is some other regression caused by building against a version in proposed and running against a version in release or updates it might not be caught (and sadly neither would the autopkgtests, they just build and run the tests). It's not clear what to do about this (other than improve the autopkgtests).

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