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Nested `not(not(P))` silently misparsed: outer `not(...)` is recognised as negation, but the inner `not(banned(X))` was parsed as a positive call to a relation called `not`. With no `not` relation present, the inner match was empty, the outer negation succeeded vacuously, and `vip(X) :- u(X), not(not(banned(X))).` collapsed to `vip(X) :- u(X).` — a silent double-negation = identity fallacy. Fix in `dl-rule-check-safety`: the positive-literal branch and `dl-process-neg!` both reject any body literal whose relation name is in `dl-reserved-rel-names`. Error message names the relation and points the user at stratified negation through an intermediate relation. 1 regression test; conformance 260/260. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
21 lines
775 B
JSON
21 lines
775 B
JSON
{
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"lang": "datalog",
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"total_passed": 260,
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"total_failed": 0,
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"total": 260,
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"suites": [
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{"name":"tokenize","passed":30,"failed":0,"total":30},
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{"name":"parse","passed":22,"failed":0,"total":22},
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{"name":"unify","passed":29,"failed":0,"total":29},
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{"name":"eval","passed":39,"failed":0,"total":39},
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{"name":"builtins","passed":23,"failed":0,"total":23},
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{"name":"semi_naive","passed":8,"failed":0,"total":8},
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{"name":"negation","passed":10,"failed":0,"total":10},
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{"name":"aggregates","passed":22,"failed":0,"total":22},
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{"name":"api","passed":20,"failed":0,"total":20},
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{"name":"magic","passed":36,"failed":0,"total":36},
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{"name":"demo","passed":21,"failed":0,"total":21}
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],
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"generated": "2026-05-11T07:40:56+00:00"
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}
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