exception under bash on win10

exception.txt

:/mnt/c/Users/xxxxx$ perl6 --ll-exception -e 'say prompt "123\n"'
123
Cannot flush handle: Failed to flush filehandle: Input/output error
   at SETTING::src/core/Exception.pm:63  (/usr/share/perl6/runtime/CORE.setting.moarvm:throw)
 from SETTING::src/core/Failure.pm:44  (/usr/share/perl6/runtime/CORE.setting.moarvm:throw)
 from SETTING::src/core/Failure.pm:86  (/usr/share/perl6/runtime/CORE.setting.moarvm:sink)
 from SETTING::src/core/io_operators.pm:89  (/usr/share/perl6/runtime/CORE.setting.moarvm:prompt)
 from SETTING::src/core/io_operators.pm:83  (/usr/share/perl6/runtime/CORE.setting.moarvm:prompt)
 from -e:1  (<ephemeral file>:<unit>)
 from -e:1  (<ephemeral file>:<unit-outer>)
 from gen/moar/stage2/NQPHLL.nqp:1589  (/usr/share/nqp/lib/NQPHLL.moarvm:eval)
 from gen/moar/stage2/NQPHLL.nqp:1696  (/usr/share/nqp/lib/NQPHLL.moarvm:)
 from gen/moar/stage2/NQPHLL.nqp:1731  (/usr/share/nqp/lib/NQPHLL.moarvm:command_eval)
 from src/Perl6/Compiler.nqp:42  (/usr/share/nqp/lib/Perl6/Compiler.moarvm:command_eval)
 from gen/moar/stage2/NQPHLL.nqp:1677  (/usr/share/nqp/lib/NQPHLL.moarvm:command_line)
 from gen/moar/main.nqp:47  (/usr/share/perl6/runtime/perl6.moarvm:MAIN)
 from gen/moar/main.nqp:38  (/usr/share/perl6/runtime/perl6.moarvm:<mainline>)
 from <unknown>:1  (/usr/share/perl6/runtime/perl6.moarvm:<main>)
 from <unknown>:1  (/usr/share/perl6/runtime/perl6.moarvm:<entry>)