$ perl Configure.pl --backends=nope
===ATTENTION===
No --prefix supplied, building and installing to /Volumes/BUKKIT/Users/coke/sandbox/nqp/install
Unknown backend: 'nope'; Known backends: moar, jvm, js
at /Volumes/BUKKIT/Users/coke/sandbox/nqp/3rdparty/nqp-configure/lib/NQP/Config.pm line 34.
NQP::Config::__ANON__("Unknown backend: 'nope'; Known backends: moar, jvm, js\x{a}") called at /Volumes/BUKKIT/Users/coke/sandbox/nqp/tools/lib/NQP/Config/NQP.pm line 21
NQP::Config::NQP::configure_backends(NQP::Config::NQP=HASH(0x7ffcd0020738)) called at Configure.pl line 82
I'd rather have them there as at some point they might help in debugging based on a user report. And since it's a building process, we're not restricted by usability guidelines.
Do we need the stack trace?