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ProbeLabs36 findings · 123 requirements
SYS-REQ-022SystemApproved

When the current path segment is intended as an array index but its syntax is malformed, Get shall return the defined not-found result rather than a successful lookup.

PriorityshallTypeguaranteeCategoryfunctionalComponentparserAssuranceBFindingsnone open

Specification

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

Description

When the current path segment is intended as an array index but its syntax is malformed, Get shall return the defined not-found result rather than a successful lookup.

FRETish formula
the parser shall always satisfy !path_segment_is_array_index | array_index_segment_is_valid | returns_invalid_array_index_not_found

Rationale & tags

Why this requirement exists, and how it is categorised.

Malformed array-index syntax is an externally visible path-interpretation case and should not be hidden inside a generic lookup-miss predicate.

decompositiongetarray-indexedge-case

Verification & provenance

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

Assurance levelB
Formalizationvalid
Realizabilityrealizable
Vacuitychecked_ok
Strategyfretish

Review

Status
approved
Reviewer
human:buger · lead_engineer
Reviewed
Jul 26, 2026, 12:44 UTC
Re-approved under L3 strict posture; content re-reviewed against current formalization

History

Created
Apr 14, 2026, 00:00 UTC · human:cli
Modified
Jul 26, 2026, 12:44 UTC · human:buger

Obligations

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

No obligations recorded for this requirement

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Formula evidence

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FRETish formula

the parser shall always satisfy !path_segment_is_array_index | array_index_segment_is_valid | returns_invalid_array_index_not_found

Variables

NameTypeDirectionDescription
path_segment_is_array_indexTrue when the current lookup path segment is interpreted as an array index.
array_index_segment_is_validTrue when the current array-index path segment has valid index syntax.
returns_invalid_array_index_not_foundTrue when Get reports the defined not-found outcome for a malformed array-index path segment.

Witnesses· 4 scenarios total

  • TestGetMalformedArrayIndex
    deep_spec_test.go:1047
  • TestMCDC_SYS_REQ_022_Row1_TriggerFalse
    mcdc_spec_witnesses_test.go:666exercises 1 condition scenario
  • TestMCDC_SYS_REQ_022_Row2_InvariantViolation
    mcdc_spec_witnesses_test.go:678exercises 1 condition scenario
  • TestMCDC_SYS_REQ_022_Row3_InvalidIndexNotFound
    mcdc_spec_witnesses_test.go:689exercises 1 condition scenario
  • TestMCDC_SYS_REQ_022_Row4_ValidSegment
    mcdc_spec_witnesses_test.go:698exercises 1 condition scenario
  • TestGetRequirementSlices
    parser_test.go:1390

Its place

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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
1
Tests
3
At-risk contracts
0

Files to re-check (1)

  • parser.goparser.go

Tests to re-run (3)

  • deep_spec_test.godeep_spec_test.go
  • mcdc_spec_witnesses_test.gomcdc_spec_witnesses_test.go
  • parser_test.goparser_test.go

What this rests on

Discussions

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