bug#50355: [core-updates-frozen] Building mozjs with rust@1.54 fails

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

Hi,

Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:

> Hello Guix!
>
> I'm nearly done updating the Rust bootstrap for core-updates-frozen; one
> of the changes is that only the current rust (1.54) gets exposed and
> used everywhere.  This seems to be OK so far, except for mozjs, which
> fails to build like so:
>
> error: aborting due to 8 previous errors
>
> Some errors have detailed explanations: E0432, E0557.
> For more information about an error, try `rustc --explain E0432`.
> The following warnings were emitted during compilation:
>
> warning: Cannot set `RUSTC_BOOTSTRAP=1` from build script of `packed_simd v0.3.3 (https://github.com/hsivonen/packed_simd?rev=3541e3818fdc7c2a24f87e3459151a4ce955a67a#3541e381)`.
> note: Crates cannot set `RUSTC_BOOTSTRAP` themselves, as doing so would subvert the stability guarantees of Rust for your project.
>
> error: could not compile `packed_simd`
>
> Caused by:
>   process didn't exit successfully: `CARGO=/gnu/store/sgvw6h637pgw3mrn9wva29b8645z37m0-rust-1.54.0-cargo/bin/cargo CARGO_CRATE_NAME=packed_simd CARGO_MANIFEST_DIR=/tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/third_party/rust/packed_simd CARGO_PKG_AUTHORS='Gonzalo Brito Gadeschi <gonzalobg88@gmail.com>' CARGO_PKG_DESCRIPTION='Portable Packed SIMD vectors' CARGO_PKG_HOMEPAGE='https://github.com/rust-lang-nursery/packed_simd' CARGO_PKG_LICENSE=MIT/Apache-2.0 CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=packed_simd CARGO_PKG_REPOSITORY='https://github.com/rust-lang-nursery/packed_simd' CARGO_PKG_VERSION=0.3.3 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=3 CARGO_PKG_VERSION_PATCH=3 CARGO_PKG_VERSION_PRE='' LD_LIBRARY_PATH='/tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/run-configure-from-here/release/deps:/gnu/store/89iv0hicjlmgdxk01sj9lc95xkdkb8f0-rust-1.54.0/lib' OUT_DIR=/tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/run-configure-from-here/x86_64-unknown-linux-gnu/release/build/packed_simd-36a821efa8c03e42/out /gnu/store/89iv0hicjlmgdxk01sj9lc95xkdkb8f0-rust-1.54.0/bin/rustc --crate-name packed_simd --edition=2018 /tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/third_party/rust/packed_simd/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=2 -C panic=abort -C embed-bitcode=no --cfg 'feature="default"' --cfg 'feature="into_bits"' -C metadata=220aa1d9e77763e7 -C extra-filename=-220aa1d9e77763e7 --out-dir /tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/run-configure-from-here/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -C linker=/tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/build/cargo-linker -L dependency=/tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/run-configure-from-here/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/run-configure-from-here/release/deps --extern cfg_if=/tmp/guix-build-mozjs-78.10.1.drv-0/firefox-78.10.1/run-configure-from-here/x86_64-unknown-linux-gnu/release/deps/libcfg_if-646d80c97708097e.rmeta --cap-lints warn -C opt-level=2 --cap-lints warn -Cembed-bitcode=yes -C codegen-units=1` (exit status: 1)

Simply updating to latest version resolves it:

successfully built /gnu/store/vbx2l76svqjbsz1dhgjr73kilgkk5ybv-mozjs-78.13.0.drv
/gnu/store/112gxnbnnw89nfhi9z74i5pzlsk8l04r-mozjs-78.13.0

Maxim