src: avoid dereference without existence check #14591
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Currently the URL API is only used from the JS binding, which always initializes
base
regardless ofhas_base
. Therefore, there is no actual security risk right now, but there would be had we made other C++ parts of Node.js use this API.Because of that, I was not able to add any JS tests, instead resorting to C++. However, the magic of C++ compilers makes a reliable test impossible, as the added test only sometimes fails before this PR, even though when it does fail it is a NULL pointer dereference.
Refs: #14369 (comment)
Checklist
make -j4 test
(UNIX), orvcbuild test
(Windows) passesAffected core subsystem(s)
url