use ErrorGuaranteed instead of booleans in rustc_builtin_macros

[lukas-code]

implements #112366 (comment)

No functional changes.

Best reviewed with whitespace diff disabled.

r? @Nilstrieb

[Noratrieb]

oops, i forgot about this
@bors r+ rollup

[bors]

📌 Commit d50875e has been approved by Nilstrieb

It is now in the queue for this repository.

[bors]

⌛ Testing commit d50875e with merge 13e785bbc0e6b9014f7df5b18d14bca8a7c0bdab...

[rust-log-analyzer]

The job x86_64-apple-1 failed! Check out the build log: (web) (plain)

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

      System Firmware Version: VMW71.00V.13989454.B64.1906190538
      OS Loader Version: 540.120.3~22
      Apple ROM Info: [MS_VM_CERT/SHA1/27d66596a61c48dd3dc7216fd715126e33f59ae7]Welcome to the Virtual Machine
      SMC Version (system): 2.8f0
      Serial Number (system): VMB4P8qMIPMY
      Provisioning UDID: 4203018E-580F-C1B5-9525-B745CECA79EB

hw.ncpu: 3
hw.byteorder: 1234
---
extracting /Users/runner/work/rust/rust/build/cache/2023-05-30/cargo-beta-x86_64-unknown-linux-gnu.tar.xz to /Users/runner/work/rust/rust/build/x86_64-unknown-linux-gnu/stage0
downloading https://static.rust-lang.org/dist/2023-05-30/rust-std-beta-aarch64-apple-darwin.tar.xz
extracting /Users/runner/work/rust/rust/build/cache/2023-05-30/rust-std-beta-aarch64-apple-darwin.tar.xz to /Users/runner/work/rust/rust/build/aarch64-apple-darwin/stage0
downloading https://static.rust-lang.org/dist/2023-05-30/rustc-beta-aarch64-apple-darwin.tar.xz
thread 'config::tests::download_ci_llvm' panicked at 'status code: 1', /Users/runner/work/rust/rust/src/tools/build_helper/src/util.rs:16:9

failures:
    config::tests::download_ci_llvm

[bors]

💔 Test failed - checks-actions

[Noratrieb]

@bors retry

[bors]

⌛ Testing commit d50875e with merge ed1ce58...

[bors]

☀️ Test successful - checks-actions
Approved by: Nilstrieb
Pushing ed1ce58 to master...

[rust-timer]

Finished benchmarking commit (ed1ce58): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.2%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.2%	[-0.2%, -0.2%]	1

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
Improvements ✅ (secondary)	-2.2%	[-2.2%, -2.2%]	1
All ❌✅ (primary)	-	-	0

Cycles

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)	-2.9%	[-2.9%, -2.9%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.9%	[-2.9%, -2.9%]	1

Binary size

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

Bootstrap: 661.562s -> 662.351s (0.12%)