xas99 throws traceback from mal formed table access (should really be a syntax error)

[MyMiscSWproJ]

Attempts to assemble the following table access construct:

mov @mess(R6,R0 --or-- mov R0,@mess(R6

will result in the following traceback: raceback (most recent call last): File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 3622, in status = Xas99Processor().main() File "/home/robert/bin/xdt99-3.6.0/xcommon.py", line 49, in main self.parse() or self.run() or self.prepare() # abort if one returns True File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 3497, in run self.asm.assemble(dirname, basename) File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 2211, in assemble self.codeasm.assemble() File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 2401, in assemble self.opcodes.process(imline.label, imline.mnemonic, imline.operands) or
File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 497, in process arg1 = parse_op1(self.asm.parser, operands[0]) if parse_op1 else None File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 325, in op_ga = lambda parser, x: parser.address(x) # [0x0000 .. 0xFFFF] File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 1605, in address return 0b10, 0, self.expression(op[1:]) File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 1665, in expression self.check_arith_precedence(terms) File "/home/robert/bin/xdt99-3.6.0/xas99.py", line 1760, in check_arith_precedence while i < len(operators): TypeError: '<' not supported between instances of 'NoneType' and 'int'

Correcting the syntax error, of course, eliminates the problem.