# DF-0601 — PoC: (none — file is orphaned/non-compiling)

No PoC can be built today. `sys/netgraph7/ng_source.c` is not listed in
`sys/conf/files` and has a compile error at line 742 (`ifq` undeclared;
should be `ifsq`). The file is dead, non-compiling code; the race defect
is latent and would only become reachable if a maintainer fixes the typo
and adds the file to the build.

See `findings/DF-0601-ng7-source-rcvdata-no-force-writer-race.md` for the
analysis and the fix diff. The PoC sketch in the finding markdown covers
the steps that would reproduce the race once the file is re-animated.