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SYS-REQ-039SystemReview

When ParseInt receives an integer token whose magnitude exceeds the supported int64 range, the parser shall return the documented overflow error.

PriorityshallTypeguaranteeCategoryfunctionalComponentparserAssuranceEFindingsHighworst open

Specification

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

Description

When ParseInt receives an integer token whose magnitude exceeds the supported int64 range, the parser shall return the documented overflow error.

FRETish formula
the parser shall always satisfy !raw_int_token_overflows_int64 | returns_parseint_overflow_error

Rationale & tags

Why this requirement exists, and how it is categorised.

Overflow is an externally visible ParseInt outcome and should be specified independently from valid integer parsing and malformed-token rejection.

decompositionparseintoverflow

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, 15:45 UTC · agent:codex
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

Behavior at limits, thresholds, and edge-of-range values.

Worst case if violatedHigh

ParseInt on 99999999999999999999 silently wraps via strconv to a negative int64 (ignoring ErrRange), producing a wrong-sign value at 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 !raw_int_token_overflows_int64 | returns_parseint_overflow_error

Variables

NameTypeDirectionDescription
raw_int_token_overflows_int64True when ParseInt receives an integer token whose magnitude exceeds the supported int64 range.
returns_parseint_overflow_errorTrue when ParseInt returns the documented overflow error for an integer token outside the supported int64 range.

Witnesses· 3 scenarios total

  • TestMCDC_SYS_REQ_039_Row1_NoOverflow
    mcdc_spec_witnesses_test.go:1373exercises 1 condition scenario
  • TestMCDC_SYS_REQ_039_Row2_InvariantViolation
    mcdc_spec_witnesses_test.go:1385exercises 1 condition scenario
  • TestObligation_SYS_REQ_039
    obligation_evidence_test.go:363
  • TestParseInt
    parser_test.go:2360exercises 1 condition scenario

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

The concrete artifacts linked to this requirement — implementing code, verifying tests, documents, and the findings raised against it.

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)

  • mcdc_spec_witnesses_test.gomcdc_spec_witnesses_test.go
  • obligation_evidence_test.goobligation_evidence_test.go
  • parser_test.goparser_test.go

What this rests on

Discussions

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