seemingly out of place errors?

[Nicholas Murphy]

I'm getting errors like the following:

ERROR: Array overflow, check MAXMAPENTRIES near identifier '$filename'

...for a line that is essentially aliasing a string variable:

filename = $filename

...and similarly:

ERROR: Array overflow, check MAXMAPENTRIES near identifier '$fd'

...for:

if ($fd == 0 && track_utility && !(pid() in redirected_stdin)) {

Admittedly in the latter case there is a check against an array, but it seems to be flagging "$fd" not the array check.

Is some array simply concurrently overflowing elsewhere?  Why am I getting these particular errors?

Thanks,
Nick