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SYS-REQ-083SystemReview

When ArrayEach is called on input truncated at a value boundary where the array-containing structure ends at EOF with no delimiter, the parser shall return an error without panicking.

PriorityshallTypeguaranteeCategoryfunctionalComponentparserAssuranceEFindingsnone open

Specification

The requirement exactly as authored — its complete prose text and, where present, the formal FRETish sentence it compiles to.

Description

When ArrayEach is called on input truncated at a value boundary where the array-containing structure ends at EOF with no delimiter, the parser shall return an error without panicking.

FRETish formula
the parser shall always satisfy !arrayeach_input_is_truncated_at_value_boundary | returns_error_for_arrayeach_truncated_value

Rationale & tags

Why this requirement exists, and how it is categorised.

ArrayEach uses Get internally for element extraction. Truncated-at-value-boundary input can trigger the same tokenEnd sentinel issues in element processing.

arrayeachtruncationsentinel

Verification & provenance

How this requirement was checked: the review trail, edit history, and the machine-analysis status terms (each ⓘ explains what it means).

Assurance levelE
Formalizationvalid
Realizabilityrealizable
Vacuitychecked_ok
Strategyfretish

Review

Status
approved
Reviewer
human:leonidbugaev
Reviewed
Apr 23, 2026, 00:00 UTC

History

Created
Apr 14, 2026, 18:00 UTC · agent:claude
Modified
Jul 26, 2026, 14:54 UTC · human:cli

Obligations

What this requirement must witness to be considered satisfied — the required evidence, and the tests that discharge each one.

1 obligation · 1 discharged

Browse the catalogue
Discharged
Worst case if violatedCritical

ArrayEach on [1, (truncated array at value boundary) advances i to EOF and the next loop body dereferences data[i] to peek the next delimiter, panicking with index-out-of-range.

Discharging evidence1/1 required witnessed
  • nominalrequiredpresent
    Covered by 1 test

Formula evidence

The formal formula behind this requirement, the variables it is written over, and the tests that exercise it (each term is explained inline).

FRETish formula

the parser shall always satisfy !arrayeach_input_is_truncated_at_value_boundary | returns_error_for_arrayeach_truncated_value

Variables

NameTypeDirectionDescription
arrayeach_input_is_truncated_at_value_boundaryTrue when ArrayEach is called on input truncated at a value boundary.
returns_error_for_arrayeach_truncated_valueTrue when ArrayEach returns an error for input truncated at a value boundary, without panicking.

Witnesses· 3 scenarios total

  • TestArrayEachTruncatedAtValueBoundary
    deep_spec_test.go:838
  • TestMCDC_SYS_REQ_083_Row1_TriggerFalse
    mcdc_spec_witnesses_test.go:2703exercises 1 condition scenario
  • TestMCDC_SYS_REQ_083_Row2_InvariantViolation
    mcdc_spec_witnesses_test.go:2717exercises 1 condition scenario
  • TestMCDC_SYS_REQ_083_Row3_TruncatedError
    mcdc_spec_witnesses_test.go:2725exercises 1 condition scenario
  • TestObligation_SYS_REQ_083
    obligation_evidence_test.go:625

Its place

This requirement shown inside its trace neighbourhood — the parents it satisfies, the code and tests attached to it, and its findings.

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Trace evidence

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Impact

Blast radius — if you change this requirement, what else may need re-checking, and what it in turn depends on.

If you change this

Requirements
0
Files
2
Tests
3
At-risk contracts
0

Files to re-check (2)

  • aliases.goaliases.go
  • parser.goparser.go

Tests to re-run (3)

  • deep_spec_test.godeep_spec_test.go
  • mcdc_spec_witnesses_test.gomcdc_spec_witnesses_test.go
  • obligation_evidence_test.goobligation_evidence_test.go

What this rests on

Discussions

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