fire up the simple recv.js example and then run send.js, it works fine the
first time, but the second time around I get the error below. This
apparently has been happening for a while (possibly a few months), however
I haven't noticed because it only happens with debug builds, and only then
the second time around. With a regular build everything seems to work fine.
I googled around a bit for this particular error and there are a bunch of
threads talking about how casting function pointers doesn't work with
emscripten and you need to avoid that, but I don't believe we actually do
that ever, and I see nothing to indicate that this sort of error would go
away with a non Debug build.
The stack trace (which you only get after rebuilding with ASSERTIONS=2)
seems pretty straightforward. It is inside pn_class_new which delegates to
a function pointer held in the pn_class_t struct that is passed in. I
believe that function pointer lookup is what is failing, but when I put
printfs in the C code to confirm this, the problem goes away.
At this point I'm kind of left scratching my head. The only thing I can
think of short of a compiler bug is that somehow the pn_class_t struct is
becoming corrupted, but I would expect valgrind to show up any sort of
memory issues like that, unless somehow it is only being triggered from the
Anyways, I figured I should give people a heads up. The workaround is easy
enough, just build with non Debug build and everything seems to work fine.
Beyond that, any insight would be greatly appreciated.
pipe() returning an error as we do not support them
Content: "Hello World!"
Invalid function pointer '14' called with signature 'iii'. Perhaps this is
an invalid value (e.g. caused by calling a virtual method on a NULL
pointer)? Or calling a function with an incorrect type, which will fail?
(it is worth building your source files with -Werror (warnings are errors),
as warnings can indicate undefined behavior which can cause this)
This pointer might make sense in another type signature: ii:
_pn_void_reify iiii: 0 iiiii: 0 iiiiii: 0 vii: 0 vi: 0
abort() at Error
at Array.b686 [as 14]
at Array._pn_transport_initialize [as 76]