src: fix node::FatalException
If a fatal exception occurs before node had a chance to setup the handler in JS properly, node::FatalException
crashes with
FATAL ERROR: v8::Function::Cast Could not convert to function
This fixes the function to display the JS error instead of crashing.
cc @addaleax
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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