Attar AOT Test262 results

Raw runner result

The run status is FAIL.

Non-PASS results remain. The counts are the original runner IDs; nothing is reclassified.

102,619variantsraw PASS 67.88 %

Pass 69,656Runtime failure 21,141Negative result unverified 8,392Compile failure 2,448Module pipeline boundary 842Unexpected accepted negative 63Negative phase mismatch 27Async completion incomplete 48Timeout 2

Result	Variants	Share
Pass`PASS`	69,656	67.88 %
Runtime failure`RUNTIME`	21,141	20.60 %
Negative result unverified`NEGATIVE_UNVERIFIED`	8,392	8.18 %
Compile failure`COMPILE`	2,448	2.39 %
Module pipeline boundary`MODULE`	842	0.82 %
Unexpected accepted negative`NEGATIVE_ACCEPTED`	63	0.06 %
Negative phase mismatch`NEGATIVE_PHASE`	27	0.03 %
Async completion incomplete`ASYNC_INCOMPLETE`	48	0.05 %
Timeout`TIMEOUT`	2	0.00 %

Policy overlay

5,653 variants sit on an accepted boundary.

INTENTIONALLY_UNSUPPORTED marks non-PASS variants that match an accepted Attar language or platform boundary. The label explains the scope. It changes no raw result ID and never counts as PASS.

Boundary and selector	Variants	Raw result split and basis
eval calls and code suites`eval-code suites or direct unqualified eval(...) calls`	801	RUNTIME 709, NEGATIVE_UNVERIFIED 7, COMPILE 31, MODULE 5, NEGATIVE_ACCEPTED 1, ASYNC_INCOMPLETE 48Attar input contract forbids executable code from eval
Function constructor calls`direct unqualified Function(...) and new Function(...) calls`	60	RUNTIME 59, COMPILE 1Attar input contract forbids executable code from Function
Dynamic executable loading`test/language/expressions/dynamic-import/**`	1,900	RUNTIME 2, NEGATIVE_UNVERIFIED 717, COMPILE 1,143, MODULE 38Attar input contract forbids runtime executable-code loading
with syntax and diagnostic`test/language/statements/with/** or the exact unsupported diagnostic`	359	RUNTIME 18, NEGATIVE_UNVERIFIED 23, COMPILE 318Attar parser boundary CPT262-WITH-UNSUPPORTED
Async generators`async generator suites or the exact unsupported diagnostic`	604	RUNTIME 84, NEGATIVE_UNVERIFIED 484, COMPILE 36Attar language boundary CPT262-ASYNC-GENERATOR-UNSUPPORTED
Resizable ArrayBuffer`Test262 feature token resizable-arraybuffer`	886	RUNTIME 886Attar language boundary CPT262-UNIMPLEMENTED-RESIZABLE-ARRAYBUFFER
Tail call optimization`Test262 feature token tail-call-optimization`	35	RUNTIME 34, COMPILE 1Attar language boundary CPT262-UNIMPLEMENTED-TAIL-CALL
Explicit resource management`Test262 feature token explicit-resource-management`	915	RUNTIME 514, NEGATIVE_UNVERIFIED 116, COMPILE 268, MODULE 13, NEGATIVE_PHASE 4Attar language boundary CPT262-UNIMPLEMENTED-USING
Promise keyed proposal`Promise/allKeyed/ and Promise/allSettledKeyed/`	174	RUNTIME 174Attar platform boundary CPT262-PROMISE-KEYED-UNSUPPORTED
Math.sumPrecise proposal`Math/sumPrecise/**`	2	RUNTIME 2Attar platform boundary CPT262-MATH-SUMPRECISE-UNSUPPORTED

Rules overlap, so the per-rule counts do not add up to the union. The 48 async eval rows stay ASYNC_INCOMPLETE in the raw run.

Sanitized result JSON ↗ Full test file index ↗ Test262 source commit ↗ All compliance suites →

Reading this report

A measurement, not a claim.

This is a full corpus measurement for the pinned Test262 checkout. It is not a claim that Attar supports all JavaScript.

How to use the numbers

Raw PASS is the measured execution.

The overlay separates accepted exclusions from work that still needs a fix or more evidence.

Separate measurements

Web Platform Tests and packaged application acceptance are measured on their own; see the compliance overview.

The JSON files carry public test names, statuses and aggregate identities. They carry no local paths and no failure detail text.

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