An APS5_EXPORT whose name says the NID is unknown can carry the NID of a
symbol nid_patcher already produces from core/libs/prx: a _nid_postfix
helper, an APS5_VABI export or an assembly function. The NID is then not
unknown, and the stub can take the place of that symbol. #5608 exported
YNw9Xk5iNWo from libSceVideoOut as a throwing stub; it is the NID of
MouseIsOpen_nid_postfix, which libSceVideoOut imports from libSceMouse,
so presentation failed with "YNw9Xk5iNWo not implemented" (#5738, #6245).
The unknown-nid rule reports an added Unknown export with the NID of a
symbol in core/libs/prx, and an added symbol with the NID of an Unknown
export. Named aliases, such as the libc and libSceAmpr exports that share
NIDs on purpose, are not checked.
Co-Authored-By: Claude Opus 5.5 <[email protected]>