tests: re-enable pretty-std-collections on macOS

[davidtwco]

Fixes #78665.

I made some small modifications to this test so that it would pass for me locally (though I was only able to test using lldb without built-in Rust support, but that seems to be the mode in which it would fail). I ran it a few hundred times with stage one and stage two to see if I could re-produce the spurious failures that were being reported in #78665 and couldn't. From the discussion in #78665, it seemed like this was related to Xcode versions and could be reproduced locally fairly easily. It's been a couple years since this was disabled so a lot has changed. If this starts failing spuriously again then we can disable it and I can look into that.

r? @wesleywiser (discussed in wg-debugging's triage meeting)

[wesleywiser]

Nice! Thanks for looking into the lldb behavior change

@bors r+

[bors]

📌 Commit cc0fa87bd4df34e0294783460c5537f1d1b371ff has been approved by wesleywiser

It is now in the queue for this repository.

[bors]

⌛ Testing commit cc0fa87bd4df34e0294783460c5537f1d1b371ff with merge 72dcbc69c9c86e26700420b72ac5aa069801bfdf...

[bors]

💔 Test failed - checks-actions

[davidtwco]

So I had originally fixed the failures that happened with new lldb versions by aliasing print to dwim-print --persistent-result on -- (lldb changed print from expr -- to dwim-print -- in a recent version, which had persistent results off by default). Instead I've just changed it back to expr -- which hopefully will work in the older version we have on CI (otherwise I'll condition this alias on lldb version), and it also fixes the issue I was experiencing in llvm/llvm-project#65076.

[wesleywiser]

@bors r+

[bors]

📌 Commit 3bd5dc3 has been approved by wesleywiser

It is now in the queue for this repository.

[bors]

⌛ Testing commit 3bd5dc3 with merge 960a5ed...

[bors]

☀️ Test successful - checks-actions
Approved by: wesleywiser
Pushing 960a5ed to master...

[rust-timer]

Finished benchmarking commit (960a5ed): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.7%	[-0.7%, -0.7%]	1
Improvements ✅ (secondary)	-3.3%	[-5.2%, -1.8%]	6
All ❌✅ (primary)	-0.7%	[-0.7%, -0.7%]	1

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 632.565s -> 631.022s (-0.24%)
Artifact size: 317.90 MiB -> 317.92 MiB (0.00%)