x86_64-unknown-linux-musl: backport musl bug fixes or use new `1.2` version?

[haraldh]

Seems like x86_64-unknown-linux-musl is built with musl-1.1.24.

For this version I hit a bug, which is fixed with
https://git.musl-libc.org/cgit/musl/commit/?id=cb5babdc8d624a3e3e7bea0b4e28a677a2f2fc46
for the renamed src/malloc/malloc.c file.

What is the recommended procedure here?

Try to persuade upstream to release a fixed musl-1.1.25 or drive rust to switch to musl-1.2.x?

[wesleywiser]

Ideally, we would upgrade to the 1.2 series. It looks like there is a PR in progress to update the libc crate which is probably a dependency before we can perform the upgrade here (rust-lang/libc#2088).

[Xuanwo]

Also related to tikv/pprof-rs#142