[Pkg-rust-maintainers] Bug#822325: rustc: FTBFS in testing: test fail

[Santiago Vila]

Package: src:rustc
Version: 1.8.0+dfsg1-1
Severity: serious

Dear maintainer:

This package currently fails to build from source in stretch.

------------------------------------------
executing x86_64-unknown-linux-gnu/test/run-pass/tcp-stress.stage2-x86_64-unknown-linux-gnu 
------stdout------------------------------

------stderr------------------------------
thread '<main>' panicked at 'called `Result::unwrap()` on an `Err` value: RecvError', src/libcore/result.rs:746
stack backtrace:
   1:     0x7fc8b2cc1900 - sys::backtrace::tracing::imp::write::h09d7a562cdce3ef9Xcv
   2:     0x7fc8b2ccac0b - panicking::default_handler::_$u7b$$u7b$closure$u7d$$u7d$::closure.44519
   3:     0x7fc8b2cca7d8 - panicking::default_handler::hf7fdb8082bcb0f80lSz
   4:     0x7fc8b2c90796 - sys_common::unwind::begin_unwind_inner::hfa667eeafdcc5750g1t
   5:     0x7fc8b2c91178 - sys_common::unwind::begin_unwind_fmt::h7ecf9e1791369861m0t
   6:     0x7fc8b2cbf391 - rust_begin_unwind
   7:     0x7fc8b2d0889f - panicking::panic_fmt::h62b9bbe5858e3d52lcM
   8:     0x55b2984f6356 - result::unwrap_failed::h10913119902250946022
   9:     0x55b2984f05f5 - main::h6d9484c71b91fae9naa
  10:     0x7fc8b2cca244 - sys_common::unwind::try::try_fn::h6973910833277520139
  11:     0x7fc8b2cbf31b - __rust_try
  12:     0x7fc8b2cc9ea1 - rt::lang_start::h5628b9e1fb87c585rKz
  13:     0x7fc8b244460f - __libc_start_main
  14:     0x55b2984ed038 - _start
  15:                0x0 - <unknown>

------------------------------------------

The build was made on two different QEMU virtual machines with 4GB RAM
and 4GB swap, running stretch, using sbuild.

The full build log is attached.

Thanks.
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