Arch Linux

@Alexander: Do you know if other Erlang packages could be affected too?

@foutrelis, no, not that I'm aware of. However, it might be safest to rebuild all of them (it's not that many).

I'll proceed with the rebuilds.

It would certainly be nice to fully understand the issue here, but the error messages aren't too helpful.

iex(1)> Elixir.Version.parse("1.2.3")
:error

iex(2)> Elixir.System.build_info
** (MatchError) no match of right hand side value: :error
(elixir) lib/system.ex:177: System.build/0
(elixir) lib/system.ex:169: System.build_info/0

Suggested new PKGBUILD for elixir: http://ix.io/tIA (elixir --version works)

I'm using the community repository (not the community-testing) and receiving a rc version of Erlang. Is that right?
BTW, I have the same problem with Elixir, this is the reason I found this bug.

Found this btw: https://github.com/elixir-lang/elixir/issues/5851

"No longer use regexes in Elixir as they are not portable from 19->20"

So I guess it was the regular expressions that necessitate a rebuild.

EDIT: Further explanation about the problem with precompiled regexes can be found in lib/elixir/lib/regex.ex: [1]

====================================================================================
## Precompilation

Regular expressions built with sigil are precompiled and stored in `.beam`
files. This may be a problem if you are precompiling Elixir to run in
different OTP releases, as OTP releases may update the underlying regular
expression engine at any time.

For such reasons, we always recomend precompiling Elixir projects using
the OTP version meant to run in production. In case cross-compilation is
really necessary, you can manually invoke `Regex.recompile/1` or `Regex.
recompile!/1` to perform a runtime version check and recompile the regex
if necessary.
====================================================================================

[1] https://raw.githubusercontent.com/elixir-lang/elixir/master/lib/elixir/lib/regex.ex