`vec!` macro is considered unsafe on latest nightly toolchain

[Veykril]

somehow this surfaced for me in 2025!

Originally posted by @bionicles in #10047

[Veykril]

Looks like the vec macro now expands to a new intrinsic box_new which is unsafe

[Veykril]

rust-lang/rust@e3010e8 makes this annoying, we now need to check the toolchain version to know the safety of an intrinsic (for some migration period). Reeason being that that commit flipped the default unsafety of intrinsics!

[Veykril]

Actually we are in luck given the legacy ones use extern blocks with a specific ABI

[bsodmike]

Started seeing this last week or so. Switched to beta and it's gone.

[aurexav]

Started seeing this last week or so. Switched to beta and it's gone.

I'm on pre-release channel. Switched to release channel and it's gone.

There might be some bugs in the package update logic?