Correctly account for niche-optimized tags in rustc_transmute #130371
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Sep 14, 2024
| @@ -359,7 +365,7 @@ pub(crate) mod rustc { | |||
| let variants = def.discriminants(cx.tcx()).try_fold( | |||
| Self::uninhabited(), | |||
| |variants, (idx, ref discriminant)| { | |||
| let variant = layout_of_variant(idx)?; | |||
| let variant = layout_of_variant(idx, Some(tag_encoding.clone()))?; | |||
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the fact that RangeInclusive is not Copy is criminal tbh
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r=me when green |
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@bors r=compiler-errors |
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Tremendous thanks for this @saethlin!!! |
Please keep me posted about this experiment! It sounds like a great way to burn down ICEs in |
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… r=compiler-errors Correctly account for niche-optimized tags in rustc_transmute This is a bit hacky, but it fixes the ICE and makes it possible to run the safe transmute check on every `mem::transmute` check we instantiate. I want to write a lint that needs to do that, but this stands well on its own. cc `@jswrenn` here's the fix I alluded to yesterday :) Fixes rust-lang#123693
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… r=compiler-errors Correctly account for niche-optimized tags in rustc_transmute This is a bit hacky, but it fixes the ICE and makes it possible to run the safe transmute check on every `mem::transmute` check we instantiate. I want to write a lint that needs to do that, but this stands well on its own. cc `@jswrenn` here's the fix I alluded to yesterday :) Fixes rust-lang#123693
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… r=compiler-errors Correctly account for niche-optimized tags in rustc_transmute This is a bit hacky, but it fixes the ICE and makes it possible to run the safe transmute check on every `mem::transmute` check we instantiate. I want to write a lint that needs to do that, but this stands well on its own. cc ``@jswrenn`` here's the fix I alluded to yesterday :) Fixes rust-lang#123693
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…kingjubilee Rollup of 3 pull requests Successful merges: - rust-lang#130295 (Fix target-cpu fpu features on Armv8-R.) - rust-lang#130325 (Use -0.0 in `intrinsics::simd::reduce_add_unordered`) - rust-lang#130371 (Correctly account for niche-optimized tags in rustc_transmute) r? `@ghost` `@rustbot` modify labels: rollup
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…iaskrgr Rollup of 5 pull requests Successful merges: - rust-lang#129195 (Stabilize `&mut` (and `*mut`) as well as `&Cell` (and `*const Cell`) in const) - rust-lang#130118 (move Option::unwrap_unchecked into const_option feature gate) - rust-lang#130295 (Fix target-cpu fpu features on Armv8-R.) - rust-lang#130371 (Correctly account for niche-optimized tags in rustc_transmute) - rust-lang#130381 (library: Compute Rust exception class from its string repr) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#130371 - saethlin:transmutability-enum-ice, r=compiler-errors Correctly account for niche-optimized tags in rustc_transmute This is a bit hacky, but it fixes the ICE and makes it possible to run the safe transmute check on every `mem::transmute` check we instantiate. I want to write a lint that needs to do that, but this stands well on its own. cc `@jswrenn` here's the fix I alluded to yesterday :) Fixes rust-lang#123693
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This is a bit hacky, but it fixes the ICE and makes it possible to run the safe transmute check on every
mem::transmutecheck we instantiate. I want to write a lint that needs to do that, but this stands well on its own.cc @jswrenn here's the fix I alluded to yesterday :)
Fixes #123693