[Pkg-rust-maintainers] Bug#993150: rust-simplelog: set TERM in debian/rules to avoid build failures

[Steve Langasek]

Package: rust-simplelog
Version: 0.7.4-2
Severity: normal
Tags: patch
User: ubuntu-devel at lists.ubuntu.com
Usertags: origin-ubuntu impish ubuntu-patch

Hi Sylvestre,

The rust-simplelog package has been failing to build in Ubuntu with the
following error:

---- tests::test stdout ----
thread 'tests::test' panicked at 'called `Option::unwrap()` on a `None` value', 
/usr/src/rustc-1.41.0/src/libcore/macros/mod.rs:15:40
stack backtrace:
   0: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Displa
y>::fmt
   1: core::fmt::write
   2: std::io::Write::write_fmt
   3: std::io::impls::<impl std::io::Write for alloc::boxed::Box<W>>::write_fmt
   4: std::panicking::default_hook::{{closure}}
   5: std::panicking::default_hook
   6: std::panicking::rust_panic_with_hook
   7: rust_begin_unwind
   8: core::panicking::panic_fmt
   9: core::panicking::panic
  10: core::option::Option<T>::unwrap
             at /usr/src/rustc-1.41.0/src/libcore/macros/mod.rs:15
  11: simplelog::tests::test
             at src/lib.rs:117
  12: simplelog::tests::test::{{closure}}
             at src/lib.rs:88
  13: core::ops::function::FnOnce::call_once
             at /usr/src/rustc-1.41.0/src/libcore/ops/function.rs:232
  14: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
  15: __rust_maybe_catch_panic
  16: test::run_test_in_process
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.


This happens because the Ubuntu build environment sets TERM=unknown, whereas
Debian I believe sets it to TERM=linux.

The attached patch overrides TERM in debian/rules, to ensure consistent
build/test results regardless of the environment.

Thanks for considering.
-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                   https://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org
-------------- next part --------------
diff -Nru rust-simplelog-0.7.4/debian/rules rust-simplelog-0.7.4/debian/rules
--- rust-simplelog-0.7.4/debian/rules	2020-04-22 04:26:38.000000000 -0700
+++ rust-simplelog-0.7.4/debian/rules	2021-08-27 18:22:02.000000000 -0700
@@ -1,4 +1,7 @@
 #!/usr/bin/make -f
+
+export TERM=linux
+
 %:
 	dh $@ --buildsystem cargo