Elixir 1.15 breaks "make relive": FORMATTER ERROR: bad return value

[badlop]

make relive works perfectly with Elixir versions like 1.14.5 or older.

However, when using Elixir 1.15.0 or higher, make relive crashes:

$ make relive
escript rel/relive.escript && MIX_ENV=dev RELIVE=true iex --name ejabberd@localhost -S mix run
Preparing relive dir _build/relive...
Preparing relive dir _build/relive/conf...
Preparing relive dir _build/relive/database...
Preparing relive dir _build/relive/logs...
FORMATTER ERROR: bad return value
FORMATTER ERROR: bad return value
FORMATTER ERROR: bad return value
...

Looking at the Elixir v1.15 release announcement , it mentions: Integration with Erlang/OTP logger. Apparently this only affects make relive; make dev and make rel work perfectly.

Compilation process:

$ iex --version
IEx 1.15.4 (compiled with Erlang/OTP 26)

$ ./autogen.sh
$ ./configure \
	--with-rebar=mix \
	--enable-all
checking whether make sets $(MAKE)... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for a sed that does not truncate output... /usr/bin/sed
checking for erl... /home/badlop/.asdf/shims/erl
checking for erlc... /home/badlop/.asdf/shims/erlc
checking for epmd... /home/badlop/.asdf/shims/epmd
checking for erl... (cached) /home/badlop/.asdf/shims/erl
checking for erlc... (cached) /home/badlop/.asdf/shims/erlc
checking for Erlang/OTP root directory... /home/badlop/.asdf/installs/erlang/26.0.1
checking for escript... /home/badlop/.asdf/installs/erlang/26.0.1/bin/escript
checking for make... make
checking Erlang/OTP version... ok
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether gcc accepts -g... yes
checking for gcc option to enable C11 features... none needed
checking for SQLite3 library >= 3.6.19... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: creating vars.config

$ make
...
==> ejabberd
Compiling 1 file (.yrl)
Compiling 281 files (.erl)
Compiling 17 files (.ex)
Generated ejabberd app
mix  compile

$ make relive
escript rel/relive.escript && MIX_ENV=dev RELIVE=true iex --name ejabberd@localhost -S mix run
Preparing relive dir _build/relive...
Preparing relive dir _build/relive/conf...
Preparing relive dir _build/relive/database...
Preparing relive dir _build/relive/logs...
FORMATTER ERROR: bad return value
FORMATTER ERROR: bad return value
FORMATTER ERROR: bad return value
...
FORMATTER ERROR: bad return value
Erlang/OTP 26 [erts-14.0.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [jit:ns]

FORMATTER ERROR: bad return value
[os_mon] memory supervisor port (memsup): Erlang has closed
make: *** [Makefile:286: relive] Error 1

[badlop]

A fix for this has been added in commit 1bf80e8