build ec_plists.erl failed

[axs]

I get the following error when trying to build master or tag v0.17.0 with rebar3 on windows with
System version: Erlang/OTP 19 [erts-8.0] [64-bit] [smp:4:4] [async-threads:10]

Compiling _build/default/lib/erlware_commons/src/ec_plists.erl failed
_build/default/lib/erlware_commons/src/ec_plists.erl:220: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:226: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:250: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:256: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:279: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:285: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:300: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:305: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:326: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:336: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:343: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:355: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:361: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:372: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:384: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:397: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:403: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:418: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:427: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:438: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:450: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:459: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:472: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:484: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:522: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:590: syntax error before: '/'
_build/default/lib/erlware_commons/src/ec_plists.erl:625: syntax error before: '/'

_build/default/lib/erlware_commons/src/ec_plists.erl:209: type el_fun() is unused

[axs]

tag 0.21.0 works for me
{erlware_commons, {git, "git://github.com/erlware/erlware_commons.git", {tag, "0.21.0"}}}