Bug report

Bug description:

The commandgc.set_debug(gc.DEBUG_STATS) no longer prints out any statistics, even thoughgc.set_debug(gc.DEBUG_COLLECTABLE) shows that thegc is still being run.

(Probably caused by the incremental GC implementation,#116206 .)

For testing you can use the following code --- in previous Python versions thecollecting generation 0 text is printed, now it's not

importgcimportsysfromtimeimportsleepgc.set_debug(gc.DEBUG_STATS|gc.DEBUG_COLLECTABLE)for__inrange(3000):a=[1]a[0]=adelaprint(__)sleep(0.001)sys.exit()

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• GH-122298: Restore printing of GC stats #123261
• [3.13] GH-122298: Restore printing of GC stats (GH-123261) #123268