Because the launchers have been extracted out, the init script doesn't find them anymore and fails when trying to validate the input. Here is the error message:
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var proto = launcher[value + 'Browser'].prototype;
TypeError: Cannot read property 'prototype' of undefined
at Object.validateBrowser [as validate] (/Users/dignifiedquire/opensource/karma/myfork/lib/init.js:54:42)
at StateMachine.onLine (/Users/dignifiedquire/opensource/karma/myfork/lib/init.js:165:25)
at Interface.EventEmitter.emit (events.js:96:17)
at Interface._onLine (readline.js:200:10)
at Interface._line (readline.js:518:8)
at Interface._ttyWrite (readline.js:736:14)
at ReadStream.onkeypress (readline.js:97:10)
at ReadStream.EventEmitter.emit (events.js:126:20)
at emitKey (readline.js:1058:12)
at ReadStream.onData (readline.js:807:7)
I'm aware of this... The whole karma init needs to be fixed to work with master, it's my last thing before pushing canary...
Good. Just wanted to document it somewhere.
This is already fixed.