Incorrect syntax in for loop crashes RF and html reports are not generated. about robotframework HOT 2 CLOSED

We actually already had tests for invalid separators, but this bug occurred only when generating the log file and our tests don't typically generate them. I changed the relevant tests so that logs are generated and fixed the problem.

The problem was that because there was no valid separator used, the parser generated a For model object with None as a separator and that wasn't handled properly elsewhere. I decided the fix the issue so that the separator is a string IN in that case instead. Alternatively could have allowed it to be None and just take that into account elsewhere, but that would have also required changing typing from the current Literal['IN', 'IN RANGE', ...] = 'IN' to something that allows None.

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Thanks for the report. This seems to a regression in RF 7.0, because the example works fine with RF 6.1. Ought to be easy to fix but we absolutely need to add tests for this as well to avoid it occurring again. Kind of good that RF 7.0.1 has been so badly delayed, because we can still get this into that release.

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