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src: fix vector subscript out of range #18460

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src: fix vector subscript out of range #18460

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2 changes: 1 addition & 1 deletion src/node.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1002,7 +1002,7 @@ MaybeLocal<Value> InternalMakeCallback(Environment* env,
} else {
std::vector<Local<Value>> args(1 + argc);
args[0] = callback;
std::copy(&argv[0], &argv[argc], &args[1]);
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You could replace &args[1] with &args.data()[1] to get rid of the conditional.

(It's legal to create a pointer that points one element beyond the array as long as you don't dereference it - which won't happen if argc == 0 because there won't be elements to copy.)

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Even better: replace it with args.begin() + 1, since std::copy works with iterators.

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Ok, updated now. Thanks for the feedback.

std::copy(&argv[0], &argv[argc], args.begin() + 1);
ret = domain_cb->Call(env->context(), recv, args.size(), &args[0]);
}

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