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Add a Lint for Pointer to Integer Transmutes in Consts

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Veera 2024-09-22 19:32:56 -04:00
parent 5d9b908571
commit ab8673501c
10 changed files with 192 additions and 18 deletions
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5
compiler/rustc_mir_transform/messages.ftl
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@ -27,3 +27,8 @@ mir_transform_unaligned_packed_ref = reference to packed field is unaligned
.note = packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
.note_ub = creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
.help = copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
mir_transform_undefined_transmute = pointers cannot be transmuted to integers during const eval
.note = at compile-time, pointers do not have an integer value
.note2 = avoiding this restriction via `union` or raw pointers leads to compile-time undefined behavior
.help = for more information, see https://doc.rust-lang.org/std/mem/fn.transmute.html