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-rw-r--r--Include/code.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/Include/code.h b/Include/code.h
index 7c7e5bf8dc..ff2b97efe9 100644
--- a/Include/code.h
+++ b/Include/code.h
@@ -21,7 +21,12 @@ typedef struct {
PyObject *co_varnames; /* tuple of strings (local variable names) */
PyObject *co_freevars; /* tuple of strings (free variable names) */
PyObject *co_cellvars; /* tuple of strings (cell variable names) */
- /* The rest doesn't count for hash or comparisons */
+ /* The rest aren't used in either hash or comparisons, except for
+ co_name (used in both) and co_firstlineno (used only in
+ comparisons). This is done to preserve the name and line number
+ for tracebacks and debuggers; otherwise, constant de-duplication
+ would collapse identical functions/lambdas defined on different lines.
+ */
unsigned char *co_cell2arg; /* Maps cell vars which are arguments. */
PyObject *co_filename; /* unicode (where it was loaded from) */
PyObject *co_name; /* unicode (name, for reference) */