[stable] Prepare 1.74.0 release #117843
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[stable] Prepare 1.74.0 release #117843
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rustbot
added
A-testsuite
the fix on nightly is recent and should get time to bake, removal of the optimization is the less risky approach for a backport
This method is trying to detect macro invocations, so that it can split a span into two parts just after the `!` of the invocation. Under some circumstances (probably involving nested macros), it gets confused and produces a span that is larger than the original span, and possibly extends outside its enclosing function and even into an adjacent file. In extreme cases, that can result in malformed coverage mappings that cause `llvm-cov` to fail. For now, we at least want to detect these egregious cases and avoid them, so that coverage reports can still be produced.
Without the workaround applied, this test will produce malformed mappings that cause `llvm-cov` to fail. (And if it does emit well-formed mappings, they should be obviously incorrect.)
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Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt |
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@bors r+ rollup=never p=10 |
bors
added
S-waiting-on-bors
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☀️ Test successful - checks-actions |
This was referenced Nov 17, 2023
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https://forge.rust-lang.org/release/process.html#promote-branches-t-3-days-monday
Also backports:
io::copy(_, Vec<u8>)specialization #117576"r? @Mark-Simulacrum