Code

I tried this code:

• https://godbolt.org/z/M33K6afz8
• https://play.rust-lang.org/?version=beta&mode=release&edition=2018&gist=095cc1d85dfd25b5dd1bc742fbf98432

I expected to see this happen: Both check1 and check2 should compile to functions that just use a compiletime-evaluated struct value

Instead, this happened: check1 disapeared from the assembly, and it looks like all the code needed to runtime-evaluate it got added instead

The weird thing is that the function that regressed is the one that uses a const item by name, rather than the one that just calls a const function inside a non-const function body.

Version it worked on

It most recently worked on: 1.74.1 (stable as of writing this)

Version with regression

from playground:

1.76.0-beta.1 (2023-12-21 0e09125c6c3c2fd70d7d)
1.77.0-nightly (2023-12-21 3d0e6bed600c0175628e)