Comment by core-explorer

debugging information is more precise than line numbers, it usually conveys line and column in a source file.

Some debuggers make use of it when displaying the current program state, the major debuggers do not allow you to step into a specific sub-call on a line (e.g. skip function arguments and go straight to the outermost function call). This is purely a UI issue, they have enough information. I believe the nnd debugger has implemented selecting the call to step into.

Addr2line could be amended. I am working on my own debugger and I keep re-implementing existing command line tools as part of my testing strategy. A finer-grained addr2line sounds like a good exercise.