Crash when trying to load the module in a debug build of Node.js

[mmomtchev]

When using a debug build of Node.js, the module crashes on load:

FATAL ERROR: v8::ToLocalChecked Empty MaybeLocal
 1: 0x559e557609e5 node::DumpBacktrace(_IO_FILE*) [../node/node_g]
 2: 0x559e5588de9e node::Abort() [../node/node_g]
 3: 0x559e5588ef4e node::OOMErrorHandler(char const*, v8::OOMDetails const&) [../node/node_g]
 4: 0x559e55c2077e v8::Utils::ReportApiFailure(char const*, char const*) [../node/node_g]
 5: 0x559e557f0eb9 v8::MaybeLocal<v8::Function>::ToLocalChecked() [../node/node_g]
 6: 0x559e557e2a65 napi_define_class [../node/node_g]
 7: 0x7f0143e750ab  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
 8: 0x7f0143e5b021  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
 9: 0x7f0143e49411  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
10: 0x7f0143e414a2  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
11: 0x7f0143ddddab  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
12: 0x7f0143dd7564  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
13: 0x7f0143e38693  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
14: 0x7f0143e3d8db  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
15: 0x7f0143e38703  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]
16: 0x7f0143dd74ab  [/home/mmom/src/node-avcpp/lib/binding/linux-x64/ffmpeg.node]

[mmomtchev]

Caused by registering class methods with the same name