$ raku -e "shell 'echo'" # from git bash on windows
Use of uninitialized value @!args of type Any in string context.
Methods .^name, .raku, .gist, or .say can be used to stringify it to something meaningful.
  in sub warn at 'SETTING::'src/core.c/control.rakumod line 267
Use of uninitialized value $!path of type Any in string context.
Methods .^name, .raku, .gist, or .say can be used to stringify it to something meaningful.
  in sub warn at 'SETTING::'src/core.c/control.rakumod line 267
The spawned command 'dir' exited unsuccessfully (exit code: 1, signal: 0)
  in method throw at 'SETTING::'src/core.c/Exception.rakumod line 65
  in method sink at 'SETTING::'src/core.c/Proc.rakumod line 223
  in block <unit> at -e line 1