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interpret: fail more gracefully on uninit unsized locals

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This commit is contained in:
Ralf Jung 2023-04-27 12:22:21 +02:00
parent 8b8110e146
commit 25e9b79060
4 changed files with 20 additions and 1 deletions
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4
compiler/rustc_middle/src/mir/interpret/error.rs
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@ -134,6 +134,9 @@ pub enum InvalidProgramInfo<'tcx> {
FnAbiAdjustForForeignAbi(call::AdjustForForeignAbiError),
/// SizeOf of unsized type was requested.
SizeOfUnsizedType(Ty<'tcx>),
/// An unsized local was accessed without having been initialized.
/// This is not meaningful as we can't even have backing memory for such locals.
UninitUnsizedLocal,
}
impl fmt::Display for InvalidProgramInfo<'_> {
@ -150,6 +153,7 @@ impl fmt::Display for InvalidProgramInfo<'_> {
Layout(ref err) => write!(f, "{err}"),
FnAbiAdjustForForeignAbi(ref err) => write!(f, "{err}"),
SizeOfUnsizedType(ty) => write!(f, "size_of called on unsized type `{ty}`"),
UninitUnsizedLocal => write!(f, "unsized local is used while uninitialized"),
}
}
}