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F-never_type`#![feature(never_type)]``#![feature(never_type)]`I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/SoundnessIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/SoundnessP-highHigh priorityHigh priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.T-langRelevant to the language teamRelevant to the language teamT-opsemRelevant to the opsem teamRelevant to the opsem teamrequires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.
Description
This code shouldn't have UB but Miri reports UB and rustc generates a SIGILL:
#![feature(never_type)]
fn main() {
unsafe {
let x = 3u8;
let x: *const ! = &x as *const u8 as *const _;
let _ = *x;
}
}
Thanks to @Nadrieril for finding this.
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F-never_type`#![feature(never_type)]``#![feature(never_type)]`I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/SoundnessIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/SoundnessP-highHigh priorityHigh priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.T-langRelevant to the language teamRelevant to the language teamT-opsemRelevant to the opsem teamRelevant to the opsem teamrequires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.