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SYS-REQ-079SystemReview

When GetBoolean addresses a value that appears to be a partial boolean literal (e.g., the addressed token is "tru" or "fals" due to truncation), the parser shall return an error from the type-classification or ParseBoolean step.

PriorityshallTypeguaranteeCategoryfunctionalComponentparserAssuranceEFindingsnone open

Specification

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

Description

When GetBoolean addresses a value that appears to be a partial boolean literal (e.g., the addressed token is "tru" or "fals" due to truncation), the parser shall return an error from the type-classification or ParseBoolean step.

FRETish formula
the parser shall always satisfy !getboolean_addressed_value_is_partial_literal | returns_getboolean_error_for_partial

Rationale & tags

Why this requirement exists, and how it is categorised.

Partial boolean literals can occur when input is truncated at a token boundary. The getType function uses tokenEnd to find the token end, and if the token is partial, it may be classified as Unknown rather than Boolean.

getbooleanpartial-literal

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

GetBoolean on an addressed token like tru (3 bytes) over-reads 4 bytes past the literal check in ParseBoolean, panicking with index-out-of-range or returning a wrong bool to the caller.

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 !getboolean_addressed_value_is_partial_literal | returns_getboolean_error_for_partial

Variables

NameTypeDirectionDescription
getboolean_addressed_value_is_partial_literalTrue when GetBoolean addresses a value that is a partial boolean literal due to truncation.
returns_getboolean_error_for_partialTrue when GetBoolean returns an error from type classification or ParseBoolean for a partial boolean literal.

Witnesses· 3 scenarios total

  • TestGetBooleanPartialLiteral
    deep_spec_test.go:781
  • TestMCDC_SYS_REQ_079_Row1_TriggerFalse
    mcdc_spec_witnesses_test.go:2587exercises 1 condition scenario
  • TestMCDC_SYS_REQ_079_Row2_InvariantViolation
    mcdc_spec_witnesses_test.go:2599exercises 1 condition scenario
  • TestMCDC_SYS_REQ_079_Row3_PartialError
    mcdc_spec_witnesses_test.go:2607exercises 1 condition scenario
  • TestObligation_SYS_REQ_079
    obligation_evidence_test.go:587

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
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
  • obligation_evidence_test.goobligation_evidence_test.go

What this rests on

Discussions

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