[question] what does mean in profile "lineNumber":-1?

[tantra35]

we profiling the same application runing on different version of nodejs:

1. nodejs 8
2. nodejs 12

for some stack frames(in below examples we will reference to function with name process_params) in nodejs8 profiling data "lineNumber" hold -1, and 0x interpret them as stack frames with v8 tag

but in nodejs12 for stak frame with the same function name in profiling data "lineNumber" holds actual line number and 0x interpret this nodes with deps tag

We can't interpret this result correctly, what does this really mean? By our measurement nodejs12 for the same application works about 30% slowly

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