Trying to open a pdf with gaia rev: aedd5c9636f305d4433491056a0ca984dfb859b1 I get the following and the progress bar never moves: E/GeckoConsole( 2256): [JavaScript Error: "setting a property that has only a getter" {file: "app://pdfjs.gaiamobile.org/content/build/pdf.worker.js" line: 34495}] This does not occur on v1.3.

So this isn't going to be a Gaia regression - we haven't changed version of pdf.js since Oct 21st. The line of code failing is: globalScope.console = workerConsole; My guess is that this is a DOM regression, so let's start there. Will work on getting a regression window to help diagnose this though.

I'm going to put money on bug 620935 being the cause, although I suspect the fix is in gaia.

Jason, thank you for looking up the relevant code bit! On main thread, window.console is a replaceable property. I would say we should do that in workers as well. Then the code in question will just work (and override the built-in console, but that's the whole point of making it replaceable).

Comment on attachment 8368535 [details] [diff] [review] worker.patch >+ if (!event.data.status || event.data.last) Why do you need that first condition? If it tests true, won't we double-finish the test? I think we should finish() here only if event.data.last. r=me with that.