Attempt to fix 1.82 CI

.github/workflows/main.yml

@@ -40,9 +40,24 @@ jobs:
  if: |
  matrix.rust == '1.63.0'
  run: |
- cargo update -p idna_adapter --precise 1.1.0
- cargo update -p getopts --precise 0.2.22
- cargo update -p unicode-width --precise 0.1.12
+ # cargo update -p idna_adapter --precise 1.1.0
+ # cargo update -p getopts --precise 0.2.22
+ # cargo update -p unicode-width --precise 0.1.12
+ # cargo update syn@2 --precise 2.0.100
+ # Unfortunately `syn@2` syntax doesn't work on 1.63, and we don't know the precise
+ # version beforehand. So we copy the lockfile we have already prepared.
+ cp ci-lockfiles/1.63.Cargo.lock Cargo.lock
+ # Older Unicode versions have a different test file
+ cp idna/tests/IdnaTestV2-Unicode16.txt idna/tests/IdnaTestV2.txt
+ - name: Downgrade deps on Rust 1.82.0
+ if: |
+ matrix.rust == '1.82.0'
+ run: |
+ cargo update -p icu_normalizer --precise 2.0.1
+ cargo update -p icu_provider --precise 2.0.0
+ cargo update -p icu_locale_core --precise 2.0.1
+ # Older Unicode versions have a different test file
+ cp idna/tests/IdnaTestV2-Unicode16.txt idna/tests/IdnaTestV2.txt
  - name: Add `aarch64-unknown-none` toolchain for `no_std` tests
  if: |
  matrix.os == 'ubuntu-latest' &&