Error whilst compiling.

[davFaithid]

Upon running make, I get the following error

./bin/ca65 bank7.asm -o bank7.o
ca65.exe: Precondition violated: Index < C->Count, file 'cc65-snapshot-2.13.9.20130201\src\common\coll.c', line 188

I also tried cl65 but no dice.
.\bin\cl65 -t none bank7.asm -o bank7.o
ca65.exe: Precondition violated: Index < C->Count, file 'cc65-snapshot-2.13.9.20130201\src\common\coll.c', line 188

I'm not very familiar with these assemblers, so I have little idea what I did wrong (I have more experience with GB disasm stuff).