This has all got very confusing and somewhere this issue got associated 
with the OpenCV issue. There are 3 issues being discussed 1) This uncaught 
type error, 2) Linking problem 3) OpenCV Crash. I will start new topics for 
my 2 problems.

John

On Monday, 28 October 2019 21:56:29 UTC, Alon Zakai wrote:
>
> These seem to be separate issues:
>
> > Uncaught (in promise) TypeError: o[r[((r[(w2 >> 2)] + 8) >> 2)]] is not 
> a function
>
> That looks like a wasm2js error perhaps, assuming that is using wasm2js 
> (non-WASM output on 1.39.0, by default). Does using latest-fastcomp fix 
> that for you? And does it work in wasm mode?
>
> It would be good to get a testcase of this. Even a large one might be 
> enough to debug it (I'd just build with wasm and without, and compare the 
> diff in the behavior).
>
> (In general, this "not a function" issue is likely a bad function pointer 
> call, which may be due to memory corruption or something else bad.)
>
> > Compiled code throwing an exception
>
> That is a C++ language exception being thrown, like maybe an assertion 
> failed in cvRegisterType. It would be interesting to know if using fastcomp 
> and/or wasm affects that too.
>
> - Alon
>
>
>

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