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Weird bits shifting behavior on win32 #16249

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tomaka opened this issue Aug 4, 2014 · 0 comments
Closed

Weird bits shifting behavior on win32 #16249

tomaka opened this issue Aug 4, 2014 · 0 comments

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@tomaka
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tomaka commented Aug 4, 2014

This is a win32-only issue.

On windows 64 bits:
(8u * std::mem::size_of::<u32>()) returns 32
3u >> (8u * std::mem::size_of::<u32>()) returns 3
3u >> 32u returns 0

EDIT: IRC found the problem, uint is only 32 bits even on Windows 64 bits, which causes undefined behavior.
Sorry for wasting your time, closing.
@tomaka tomaka closed this as completed Aug 4, 2014
@MarcelRaschke MarcelRaschke mentioned this issue Sep 30, 2022
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bors added a commit to rust-lang-ci/rust that referenced this issue Jan 8, 2024
@bors
Auto merge of rust-lang#16249 - lnicola:sync-from-rust, r=lnicola
8356bc9 
internal: Sync from rust
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