why in narwhal is pc() not considered a label

[Alcaro]

which of you were asleep at the wheel when adding that

[23:58:34]  <Sir Walrus> !rb as2
org $008000
lda walrus,x
if pc() == $008003
walrus
endif
walrus = $018000
[23:58:34]  <randombot999#8226> Errors occurred while assembling.
: error: (Einternal_error): An internal error occured (phantom error). This is a bug in Asar, please report it at https://github.com/RPGHacker/asar/issues, along with a patch that reproduces it if possible.