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Bump MSRV to 1.60 and check MSRV in CI #108

Merged
merged 2 commits into from
Mar 30, 2024
Merged

Bump MSRV to 1.60 and check MSRV in CI #108

merged 2 commits into from
Mar 30, 2024

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taiki-e
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@taiki-e taiki-e commented Mar 30, 2024

syn 2.0.57 requires it.

error: failed to select a version for the requirement `syn = "=2.0.57"`
candidate versions found which didn't match: 2.0.56, 2.0.55, 2.0.54, ...
location searched: crates.io index

dtolnay/syn@585df47

Very confusing error message is due to rust-lang/cargo#10623.

syn 2.0.57 requires it.

```
error: failed to select a version for the requirement `syn = "=2.0.57"`
candidate versions found which didn't match: 2.0.56, 2.0.55, 2.0.54, ...
location searched: crates.io index
```
@taiki-e taiki-e merged commit b71fbe3 into eupn:master Mar 30, 2024
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@taiki-e taiki-e deleted the msrv branch March 30, 2024 09:08
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taiki-e commented Mar 30, 2024

A side effect of rust-lang/cargo#10623 is that pre-1.60 cargo cannot understand weak dependencies and namespace features, so if we generate a lockfile with pre-1.60 cargo, a version compatible with pre-1.60 will be selected.

$ cargo +1.56 generate-lockfile
$ cargo tree -p syn            
syn v2.0.56
├── proc-macro2 v1.0.79
│   └── unicode-ident v1.0.12
├── quote v1.0.35
│   └── proc-macro2 v1.0.79 (*)
└── unicode-ident v1.0.12
$ cargo +1.56 check            
    Finished dev [unoptimized + debuginfo] target(s) in 0.58s

So, as long as syn can be compiled with 1.60, I think we can revert this MSRV bump.

taiki-e added a commit to taiki-e/macrotest that referenced this pull request Mar 30, 2024
taiki-e added a commit that referenced this pull request Mar 30, 2024
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