[DRE-maint] Bug#981847: ArgumentError: invalid byte sequence in US-ASCII

[Ritesh Raj Sarraf]

Package: ruby-power-assert
Version: 1.1.7-1
Severity: serious
Tags: ftbfs
Justification: fails to build from source

Dear Maintainer,

During a rebuild of the package on Bullseye, the package fails in one of
the tests. Below is the failure snippet. The same is also seen in the
Reproducible Builds reports.

```
[  194s] -------------------------------------------------------------------------------
[  194s] 107 tests, 152 assertions, 0 failures, 1 errors, 0 pendings, 0 omissions, 0 notifications
[  194s] 99.0654% passed
[  194s] -------------------------------------------------------------------------------
[  194s] 23.20 tests/s, 32.95 assertions/s
[  194s] rake aborted!
[  194s] Command failed with status (1): [ruby -w -I"test"  "/usr/share/rubygems-integration/all/gems/rake-13.0.1/lib/rake/rake_test_loader.rb" "test/block_test.rb" "test/dyna_symbol_key_test.rb" "test/parser_test.rb" "test/safe_op_test.rb" "test/trace_test.rb" "test/test_core_ext_helper.rb" "test/test_helper.rb" -v]
[  194s] /usr/share/rubygems-integration/all/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
[  194s] Tasks: TOP => default
[  194s] (See full trace by running task with --trace)
[  194s] ERROR: Test "ruby2.7" failed. Exiting.
[  194s] dh_auto_install: error: dh_ruby --install /usr/src/packages/BUILD/debian/ruby-power-assert returned exit code 1
[  194s] make: *** [debian/rules:6: binary] Error 25
[  194s] dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
```


-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (990, 'testing'), (500, 'stable-updates'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.0-3-amd64 (SMP w/8 CPU threads)
Kernel taint flags: TAINT_USER
Locale: LANG=en_IN.UTF-8, LC_CTYPE=en_IN.UTF-8 (charmap=UTF-8), LANGUAGE=en_US
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

-- no debconf information