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Warn on boot for OTP28.0 #14732

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Warn on boot for OTP28.0 #14732

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10 changes: 10 additions & 0 deletions lib/elixir/src/elixir.erl
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Original file line number Diff line number Diff line change
Expand Up @@ -128,6 +128,16 @@ parse_otp_release() ->
%% Whenever we change this check, we should also change Makefile.
case string:to_integer(erlang:system_info(otp_release)) of
{Num, _} when Num >= 26 ->
case Num == 28 andalso (code:ensure_loaded(re) == {module, re}) andalso not erlang:function_exported(re, import, 1) of
true ->
io:format(standard_error,
"warning! Erlang/OTP 28.0 detected.~n"
"Regexes will be re-compiled from source at runtime, which will cause degraded performance.~n"
"This can be fixed by using Erlang OTP 28.1+ or 27-.~n"
, []);
false ->
ok
end,
Num;
_ ->
io:format(standard_error, "ERROR! Unsupported Erlang/OTP version, expected Erlang/OTP 26+~n", []),
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