[whatwg] Canvas API: What should happen if non-finite floats are used

[Boris Zbarsky]

On 9/8/10 1:33 PM, Oliver Hunt wrote:
> Additionally there is content that depends on the non-throwing behaviour, in webkit we had to drop the exceptions that we threw due to content that worked in firefox because of the absence of exceptions.

I'm really curious about this claim.  Looking at the code, we seem to 
throw on all the functions I see that take floats if the float is 
non-finite, and those checks all go back to November 2006.  Were you 
running into compat issues _before_ that or something?  Note that before 
we added the checks we just passed the non-finite values to the drawing 
library, which typically crashed rather than "silently working".

-Boris