==> poison
Compiling 4 files (.ex)
warning: use Bitwise is deprecated. import Bitwise instead
lib/poison/parser.ex:65: Poison.Parser

warning: use Bitwise is deprecated. import Bitwise instead
lib/poison/encoder.ex:112: Poison.Encoder.BitString

Invalid tag in make_internal_hash(0xC0, 0)

Crash dump is being written to: erl_crash.dump...beam/erl_term.h:1489:tag_val_def() Assertion failed: tag_val_def error
Abort trap (core dumped)
drobban@x-system ~/code/elixir/poison $ erl --version
Erlang/OTP 25 [erts-13.1.4] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [jit:ns] [dtrace] [sharing-preserving]

Eshell V13.1.4 (abort with ^G)
1>
BREAK: (a)bort (A)bort with dump (c)ontinue (p)roc info (i)nfo
(l)oaded (v)ersion (k)ill (D)b-tables (d)istribution
^Cdrobban@x-system ~/code/elixir/poison $ iex --version
Erlang/OTP 25 [erts-13.1.4] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [jit:ns] [dtrace] [sharing-preserving]

IEx 1.14.3 (compiled with Erlang/OTP 24)

On system running 13.1-RELEASE FreeBSD 13.1-RELEASE releng/13.1-n250148-fc952ac2212 GENERIC amd64