compiler: update hashbrown to 0.17

[cuviper]

See library's #155154 for the bug fixes this brings.
This PR also updates indexmap in the compiler as a direct dependent.

[rustbot]

These commits modify the Cargo.lock file. Unintentional changes to Cargo.lock can be introduced when switching branches and rebasing PRs.

If this was unintentional then you should revert the changes before this PR is merged.
Otherwise, you can ignore this comment.

[rustbot]

r? @Mark-Simulacrum

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[rustbot]

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  • 6e618be

[Mark-Simulacrum]

@bors try @rust-timer queue

At some point we should chase down the other sources of older deps as well:

$ cargo tree -i hashbrown@0.16.1 --depth 1
hashbrown v0.16.1
└── indexmap v2.13.0

hashbrown v0.16.1
├── indexmap v2.13.0
├── rustc_data_structures v0.0.0 (compiler/rustc_data_structures)
├── wasmparser v0.246.2
└── wit-parser v0.246.2

$ cargo tree -i hashbrown@0.15 --depth 1
hashbrown v0.15.5
├── object v0.36.7
├── object v0.37.3
└── thorin-dwp v0.9.0

[rust-bors]

☀️ Try build successful (CI)
Build commit: 110c0e2 (110c0e2412ed37d74fb75f3bc12e379661dd5247, parent: 17584a181979f04f2aaad867332c22db1caa511a)

[rust-timer]

Finished benchmarking commit (110c0e2): comparison URL.

Overall result: no relevant changes - no action needed

Benchmarking means the PR may be perf-sensitive. It's automatically marked not fit for rolling up. Overriding is possible but disadvised: it risks changing compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -perf-regression

Instruction count

This perf run didn't have relevant results for this metric.

Max RSS (memory usage)

Results (primary 2.1%, secondary -4.5%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.1%	[2.1%, 2.1%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-4.5%	[-4.5%, -4.5%]	1
All ❌✅ (primary)	2.1%	[2.1%, 2.1%]	1

Cycles

This perf run didn't have relevant results for this metric.

Binary size

This perf run didn't have relevant results for this metric.

Bootstrap: 489.468s -> 491.134s (0.34%)
Artifact size: 394.17 MiB -> 394.18 MiB (0.00%)

[Mark-Simulacrum]

@bors r+

[rust-bors]

📌 Commit 6e618be has been approved by Mark-Simulacrum

It is now in the queue for this repository.

[rust-bors]

💔 Test for 68e557c failed: CI. Failed job:

• auto - x86_64-gnu-llvm-21 (web logs, enhanced plaintext logs)

[rust-log-analyzer]

The job x86_64-gnu-llvm-21 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[TIMING:end] compile::StdLink { compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target_compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu, crates: [], force_recompile: false } -- 0.002
##[group]Building stage1 compiler artifacts (stage0 -> stage1, x86_64-unknown-linux-gnu)
error: process didn't exit successfully: `sccache /checkout/obj/build/bootstrap/debug/rustc -vV` (exit status: 2)
--- stderr
sccache: error: Timed out waiting for server startup. Maybe the remote service is unreachable?
Run with SCCACHE_LOG=debug SCCACHE_NO_DAEMON=1 to get more information

Bootstrap failed while executing `--stage 2 test tests/mir-opt --host= --target=i686-unknown-linux-gnu`
Build completed unsuccessfully in 0:00:17
  local time: Wed Apr 15 00:42:19 UTC 2026
  network time: Wed, 15 Apr 2026 00:42:19 GMT

[JonathanBrouwer]

@bors retry
Spurious