emacs unexmacosx.c aborting during build

I'm trying to install emacs +gtk and it barfs with a display of registers and memory followed by: Assertion failed: (filesize <= ranges->size), function unexec_regions_recorder, file /Users/kshaw/Desktop/Source/emacs-22.1/ src/unexmacosx.c, line 454. make[1]: *** [emacs] Abort trap make[1]: *** Deleting file `emacs' make: *** [src] Error 2 Do you know a fix? Incidentally, I tried building from source from downloading the tar and I get the same error during the build.