Pin to rust 1.72 in CI

[charlesbluca]

Looking at rust-lang/rust#125067, it looks like the recent build issues we've been seeing in GPU CI (link) are a result of us using an outdated glibc version with our Rust toolchain.

This PR pins us to rust 1.72 across CI for now to circumvent these failures, which is consistent with the version used in our conda builds.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.27%. Comparing base (7600f60) to head (c6ce8e9).
Report is 5 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1333      +/-   ##
==========================================
- Coverage   85.47%   76.27%   -9.21%     
==========================================
  Files          77       77              
  Lines        4242     4231      -11     
  Branches      790      696      -94     
==========================================
- Hits         3626     3227     -399     
- Misses        448      855     +407     
+ Partials      168      149      -19     

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[bdice]

Just FYI -- there is a movement towards using {{ stdlib("c") }} instead of sysroot_{{ target_platform }}. See this cuda-feedstock issue for a short description and this conda-forge issue for more details.

I'm not sure if this affects environments, probably only conda-build recipes. Just wanted to share for awareness.

[charlesbluca]

Thanks for the context @bdice! Yeah have seen that migration work and expect it should be relevant if/when this impacts conda builds, though for now it looks like conda-forge only has up to rust 1.77.2 so may be a few weeks before we can check if this fix is needed / works there.

Though I suppose it doesn't hurt to update the recipe here to add this specification and see what hurdles we encounter

[jakirkham]

Have we raised an issue with the rust-feedstock?

[charlesbluca]

rerun tests

[charlesbluca]

Have we raised an issue with the rust-feedstock?

@jakirkham an issue to add {{ stdlib("c") }} to rust's build dependencies, or something else?

[jakirkham]

Would start with rust itself

Narrowing down dependencies may involve some discussion

[charlesbluca]

Filed in conda-forge/rust-feedstock#192