FA-15859 / Floating-point arithmetic / Member archive

Nonfinite classification ignores a NaN payload · case 04

Nonfinite classification ignores a NaN payload.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

Decode an unsigned 64-bit IEEE binary64 encoding into sign, kind, unbiased exponent, integer significand, quiet flag and payload. Nonfinite fields use null; zero and subnormal exponents are -1022.

Why this case matters

An offline floating representation model isolates a reproducible arithmetic fault.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
quiet payload	`[1, "infinity", null, null, true, 4]`	`[1, "nan", null, null, true, 4]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.