diff options
Diffstat (limited to 'Objects')
| -rw-r--r-- | Objects/lnotab_notes.txt | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Objects/lnotab_notes.txt b/Objects/lnotab_notes.txt index 3dab2b9..71a2979 100644 --- a/Objects/lnotab_notes.txt +++ b/Objects/lnotab_notes.txt @@ -3,7 +3,9 @@ All about co_lnotab, the line number table. Code objects store a field named co_lnotab. This is an array of unsigned bytes disguised as a Python bytes object. It is used to map bytecode offsets to source code line #s for tracebacks and to identify line number boundaries for -line tracing. +line tracing. Because of internals of the peephole optimizer, it's possible +for lnotab to contain bytecode offsets that are no longer valid (for example +if the optimizer removed the last line in a function). The array is conceptually a compressed list of (bytecode offset increment, line number increment) |