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Perseus export of a legacy input question with an overflowing numeric answer ships invalid JSON #6232
Description
Activity
- added a parent issue
on Sep 30, 2026 Plan:
PerseusExerciseGeneratordropsINPUT_QUESTIONanswers whose parsed value isinf/-inf/nan, so the rendered item JSON is valid.- Drop non-finite input answers
- Simplify pass
Assumptions — the issue did not settle these; say so if one is wrong.
- Filter in
_process_input_answers, notparse_valid_number; if the parser should own it, move the check there and add atest_parser.pycase. - Dropping every answer of an item (all non-finite) still publishes the item with no answers; if it should be skipped or flagged, that is a separate change.
@rtibblesbot's comments are generated by an LLM, and should be evaluated accordingly
How was this generated?
- Implemented code following the pre-approved plan using test-driven development (red-green-refactor)
- Ran the project's full test suite and linter before committing
- For UI changes: captured live screenshots to verify rendering
- For backend changes: verified with example API/CLI output
- removed a parent issue
on Sep 30, 2026
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Observed behavior
PerseusExerciseGenerator._process_input_answerskeeps any answer whoseextract_value(...)is truthy.extract_value("1e400")isinf(-1e400→-inf; a 401-digit integer →inf; aninf/inffraction →nan), so theperseus/input_question.jsontemplate renders"value": inf.This applies to legacy
INPUT_QUESTIONitems. #6231 gates native QTI text-entry items out of derivation but does not touch this path.Errors and logs
json.loadson the rendered item raisesJSONDecodeError.Expected behavior
Non-finite answers are dropped, like other unparseable answers, so the item JSON is valid.
User-facing consequences
Older Kolibri cannot load the item JSON, so learners get no exercise for the node.
Steps to reproduce
INPUT_QUESTIONitem with answer"1e400"._process_input_answers, thenrender_to_string("perseus/input_question.json", ...).json.loadson the output fails on"value": inf.Context
extract_value#6228