STINNER Victor added the comment:

> Are you aware of tools decoding directly co_lnotab?

Ah! I found Ned Batchelder's coverage project which has a _bytes_lines() method 
"adapted from dis.py in the standard library". The method uses directly 
co_lnotab to compute line numbers.

Ok, *this project* will have to be updated if it wants to support fatoptimizer 
and other code transformers producing negative line numbers.

Maybe I can contribute to it with a patch if my change to CPython 3.6 is 
accepted ;-)

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<http://bugs.python.org/issue26107>
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