Installing DateTime::Timezones:ver<0.4.1>:auth<zef:guifa> fails but keeps installation

[patrickbkr]

Context

When installing DateTime::Timezones:ver<0.4.1>:auth<zef:guifa> without testing in a clean Rakudo installation (in particular Timezones::ZoneInfo is not installed) causes the installation to fail with

===> Installing: DateTime::Timezones:ver<0.4.1>:auth<zef:guifa>
===> Install [FAIL] for DateTime::Timezones:ver<0.4.1>:auth<zef:guifa>: ===SORRY!=== Error while compiling /home/patrickb/repos/oom-tester/site#sources/2A9434081F71A52370A042FD17EC5DA3DDA7F641 (DateTime::Timezones)
Could not find Timezones::ZoneInfo in:
    /home/patrickb/.rakubrew/versions/moar-2023.04/share/perl6/site
    /home/patrickb/.rakubrew/versions/moar-2023.04/share/perl6/vendor
    /home/patrickb/.rakubrew/versions/moar-2023.04/share/perl6/core
    CompUnit::Repository::AbsolutePath<95404224>
    CompUnit::Repository::NQP<85623944>
    CompUnit::Repository::Perl5<85623984>
at /home/patrickb/repos/oom-tester/site#sources/2A9434081F71A52370A042FD17EC5DA3DDA7F641 (DateTime::Timezones):3

===SORRY!=== Error while compiling /home/patrickb/repos/oom-tester/site#sources/2A9434081F71A52370A042FD17EC5DA3DDA7F641 (DateTime::Timezones)
Could not find Timezones::ZoneInfo in:
    /home/patrickb/.rakubrew/versions/moar-2023.04/share/perl6/site
    /home/patrickb/.rakubrew/versions/moar-2023.04/share/perl6/vendor
    /home/patrickb/.rakubrew/versions/moar-2023.04/share/perl6/core
    CompUnit::Repository::AbsolutePath<95404224>
    CompUnit::Repository::NQP<85623944>
    CompUnit::Repository::Perl5<85623984>
at /home/patrickb/repos/oom-tester/site#sources/2A9434081F71A52370A042FD17EC5DA3DDA7F641 (DateTime::Timezones):3

That makes sense as the dependency specification in META6.json is faulty.

Observed Behavior

The package is installed.

Expected Behavior

The package is not installed.

Wild guess: The installation (as in copy files into the CURI) actually succeeds. But the precompilation of the sources fails. That's not part of the installation process itself and in principle optional. So technically the installation actually succeeded. If that is the case, then the error message is misleading.

Steps to Reproduce

$ zef install --/test 'DateTime::Timezones:ver<0.4.1>:auth<zef:guifa>'
# Results in an installation failure
$ zef install --/test 'DateTime::Timezones:ver<0.4.1>:auth<zef:guifa>'
All candidates are currently installed
No reason to proceed. Use --force-install to continue anyway

Your Environment

• raku -v
  Welcome to Rakudo™ v2023.04.
  Implementing the Raku® Programming Language v6.d.
  Built on MoarVM version 2023.04.
• zef list --installed
  As stated above start with no modules installed.

[alabamenhu]

Per my and @patrickbkr 's IRC discussion, recommend closing this, as the issue with v0.4.1 is that I messed up the depends section. This has been fixed in v0.4.2 which installs correctly.

[patrickbkr]

@alabamenhu But this issue is not about the error in the module. It's about the module installation erroring, but then - against my expectation - still having the module installed. Is the error ignorable and the resulting installation is just fine? Is the resulting installation faulty? A user can't know. The same issue could pop up with any other module that happens to fail to install for any reason.
That's why I created a zef issue (instead of a DateTime::Timezones issue).