Fix failure to parse rustc's JSON output if it is too nested #11368
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☀️ Test successful - checks-actions |
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7 commits in eb5d35917b2395194593c9ca70c3778f60c1573b..ba607b23db8398723d659249d9abf5536bc322e5 2022-11-17 22:08:43 +0000 to 2022-11-22 20:52:39 +0000 - Fix failure to parse rustc's JSON output if it is too nested (rust-lang/cargo#11368) - Add suggestions when `cargo add` multiple packages (rust-lang/cargo#11186) - Update mod.rs (rust-lang/cargo#11395) - Fix typo `try use` -> `try to use` (rust-lang/cargo#11394) - Add warning when `cargo tree -i <spec>` can not find packages (rust-lang/cargo#11377) - Clean profile, patch, and replace in cargo remove (rust-lang/cargo#11194) - chore: Upgrade miow (rust-lang/cargo#11391)
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Update cargo 7 commits in eb5d35917b2395194593c9ca70c3778f60c1573b..ba607b23db8398723d659249d9abf5536bc322e5 2022-11-17 22:08:43 +0000 to 2022-11-22 20:52:39 +0000 - Fix failure to parse rustc's JSON output if it is too nested (rust-lang/cargo#11368) - Add suggestions when `cargo add` multiple packages (rust-lang/cargo#11186) - Update mod.rs (rust-lang/cargo#11395) - Fix typo `try use` -> `try to use` (rust-lang/cargo#11394) - Add warning when `cargo tree -i <spec>` can not find packages (rust-lang/cargo#11377) - Clean profile, patch, and replace in cargo remove (rust-lang/cargo#11194) - chore: Upgrade miow (rust-lang/cargo#11391)
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What does this PR try to resolve?
The structure of rustc's JSON outputs is recursive. See https://docs.rs/rustfix/0.6.1/rustfix/diagnostics/struct.Diagnostic.html which has a field
children: Vec<Self>. When macros are involved, this output can end up getting arbitrarily deeply nested, and eventually causes Cargo to fail to parse it. In this situation Cargo will just dump the entire unformatted JSON output through to stderr instead of a rendered diagnostic.This PR makes Cargo able to safely pick out a rendered diagnostic from arbitrarily deeply nested rustc JSONs.
How should we test and review this PR?
Before: 335 Kilobytes of unformatted JSON
After: rendered diagnostic as expected.