Subject: bug#74142: closed (Re: bug#74142: [rust-team] rust-bootstrap fails parallel build on x86-64)

From: [email-masked] (GNU bug Tracking System)
Date: Wed, 25 Dec 2024 14:45:03 +0000

Your bug report

#74142: [rust-team] rust-bootstrap fails parallel build on x86-64

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

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74142: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=74142
GNU Bug Tracking System
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Subject: Re: bug#74142: [rust-team] rust-bootstrap fails parallel build on x86-64
From: Efraim Flashner <[email-masked]>
To: Maxim Cournoyer <[email-masked]>
Cc: [email-masked], Greg Hogan <[email-masked]>
Date: Wed, 25 Dec 2024 16:43:02 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

I don't remember if I closed this but I've updated the mrustc snapshot
and now parallel builds are supported by default, on all architectures.

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Subject: [rust-team] rust-bootstrap fails parallel build on x86-64
From: Greg Hogan <[email-masked]>
To: [email-masked]
Cc: Efraim Flashner <[email-masked]>
Date: Thu, 31 Oct 2024 15:13:40 -0400
List-Id: <debbugs-submit.debbugs.gnu.org>

derivation: 83qbfg0xxsfr5lsc81m5a770c7c7b55k-rust-1.54.0.drv
commit: 6e50b0c56a8cc767bd3acb26638f78c450bde718

Build log attached, tail portion below. Has consistently failed to
build unless cores=1.

The package definition has "#:parallel-build? ,(target-x86-64?)" but
the noted build issue ("race conditions between various dependent
crates") is also seen on x86-64.

It is only the 1.54 build with mrustc that fails in this manner, the
following rust packages in the chain build fine with parallelism
enabled.

Greg

--8<---------------cut here---------------start------------->8---
(36/175) BUILDING autocfg v1.0.1
> /tmp/guix-build-rust-1.54.0.drv-0/mrustc/bin/mrustc rustc-1.54.0-src/vendor/autocfg/src/lib.rs -o output/rustc-build/libautocfg-1_0_1.rlib --crate-name autocfg --crate-type rlib -C emit-depfile=output/rustc-build/libautocfg-1_0_1.rlib.d --crate-tag 1_0_1 --cfg debug_assertions -O -L output -L output/rustc-build
> /tmp/guix-build-rust-1.54.0.drv-0/mrustc/output/rustc-build/build_bitflags-1_2_1_run
> /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/bitflags/output/rustc-build/build_memchr-2_4_0_H6_run
Unable to run process
'/tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/bitflags/output/rustc-build/build_memchr-2_4_0_H6_run'
- No such file or directory
Calling /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/bitflags/output/rustc-build/build_memchr-2_4_0_H6_run
failed (see /tmp/guix-build-rust-1.54.0.drv-0/mrustc/output/rustc-build/build_memchr-2_4_0_H6.txt_failed.txt
for stdout)
(37/175) BUILDING bitflags v1.2.1
> /tmp/guix-build-rust-1.54.0.drv-0/mrustc/bin/mrustc rustc-1.54.0-src/vendor/bitflags/src/lib.rs -o output/rustc-build/libbitflags-1_2_1.rlib --crate-name bitflags --crate-type rlib -C emit-depfile=output/rustc-build/libbitflags-1_2_1.rlib.d --crate-tag 1_2_1 --cfg debug_assertions -O -L output -L output/rustc-build --cfg bitflags_const_fn
Unable to run process
'/tmp/guix-build-rust-1.54.0.drv-0/mrustc/bin/mrustc' - No such file
or directory
> /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_ryu-1_0_5_run
Unable to run process
'/tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_ryu-1_0_5_run'
- No such file or directory
Calling /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_ryu-1_0_5_run
failed (see /tmp/guix-build-rust-1.54.0.drv-0/mrustc/output/rustc-build/build_ryu-1_0_5.txt_failed.txt
for stdout)
> /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_snap-1_0_5_run
Unable to run process
'/tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_snap-1_0_5_run'
- No such file or directory
Calling /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_snap-1_0_5_run
failed (see /tmp/guix-build-rust-1.54.0.drv-0/mrustc/output/rustc-build/build_snap-1_0_5.txt_failed.txt
for stdout)
> /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_maybe-uninit-2_0_0_run
Unable to run process
'/tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_maybe-uninit-2_0_0_run'
- No such file or directory
Calling /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_maybe-uninit-2_0_0_run
failed (see /tmp/guix-build-rust-1.54.0.drv-0/mrustc/output/rustc-build/build_maybe-uninit-2_0_0.txt_failed.txt
for stdout)
> /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_typenum-1_12_0_run
Unable to run process
'/tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_typenum-1_12_0_run'
- No such file or directory
Calling /tmp/guix-build-rust-1.54.0.drv-0/rustc-1.54.0-src/vendor/memchr/output/rustc-build/build_typenum-1_12_0_run
failed (see /tmp/guix-build-rust-1.54.0.drv-0/mrustc/output/rustc-build/build_typenum-1_12_0.txt_failed.txt
for stdout)
BUILD FAILED
make: *** [minicargo.mk:228: output/rustc] Error 1
error: in phase 'build': uncaught exception:
%exception #<&invoke-error program: "make" arguments: ("-f"
"minicargo.mk" "output/rustc" "RUSTC_TARGET=x86_64-unknown-linux-gnu"
"RUSTC_VERSION=1.54.0" "MRUSTC_TARGET_VER=1.54" "CFLAGS=-std=gnu11"
"OUTDIR_SUF=") exit-status: 2 term-signal: #f stop-signal: #f>
phase `build' failed after 617.7 seconds
command "make" "-f" "minicargo.mk" "output/rustc"
"RUSTC_TARGET=x86_64-unknown-linux-gnu" "RUSTC_VERSION=1.54.0"
"MRUSTC_TARGET_VER=1.54" "CFLAGS=-std=gnu11" "OUTDIR_SUF=" failed with
status 2
build process 18 exited with status 256
--8<---------------cut here---------------end--------------->8---