Re: Rust 1.19 fails to build on i686 on ‘staging’

[Mark H Weaver]

Hi Ludovic,

Ludovic Courtès <address@hidden> writes:

> Rust fails to build on i686 on ‘staging’, so I don’t know if it’s
> deterministic (the “unexpected EOF” reminds me of parallel build issues
> with half-baked makefiles):
>
> BUILDING crates_io from crates-io v0.9.0 with features []
>> /gnu/store/fw4yy7cgb5ahs9s2ir00bawnsl5zj7db-mrustc-0.8.0/bin/mrustc 
>> src/tools/cargo/src/crates-io/lib.rs --crate-name crates_io --crate-type 
>> rlib --crate-tag 0_9_0 -g --cfg debug_assertions -O -o 
>> output/cargo-build/libcrates_io-0_9_0.hir -L output/cargo-build --extern 
>> curl=output/cargo-build/libcurl-0_4_6.hir --extern 
>> error_chain=output/cargo-build/liberror_chain-0_10_0.hir --extern 
>> serde=output/cargo-build/libserde-1_0_6.hir --extern 
>> serde_derive=output/cargo-build/libserde_derive-1_0_6.hir --extern 
>> serde_json=output/cargo-build/libserde_json-1_0_2.hir --extern 
>> url=output/cargo-build/liburl-1_4_0.hir -L output -L 
>> /gnu/store/fw4yy7cgb5ahs9s2ir00bawnsl5zj7db-mrustc-0.8.0/lib/mrust
> munmap_chunk(): invalid pointer
> src/tools/cargo/src/crates-io/lib.rs:65: BUG:src/expand/proc_macro.cpp:941: 
> Unexpected EOF while reading from child process
> BUILD FAILED

FYI, this is not specific to the 'staging' branch.  The same error has
been happening on our 'master' branch since at least September 2018:

  https://hydra.gnu.org/job/gnu/master/rust-1.20.0.i686-linux/all

      Mark