>>> from test_ import process_file

>>> process_file('arch/zx48k/read0.bas')
read0.bas:12: error: 'x' is a SUB not a FUNCTION
>>> process_file('arch/zx48k/read1.bas')
read1.bas:11: error: Cannot read 'x'. It's an array
>>> process_file('arch/zx48k/read3.bas')
read3.bas:9: error: 'x' is neither an array nor a function.
>>> process_file('arch/zx48k/read6.bas')
read6.bas:12: error: Syntax error. Can only read a variable or an array element
>>> process_file('arch/zx48k/data0.bas')
data0.bas:2: error: 'b' is neither an array nor a function.
>>> process_file('arch/zx48k/readbug.bas')
readbug.bas:2: error: No DATA defined
