FAILURE MAP

Understand the failure.
Verify the repair.

Small, reproducible software failures. The broken implementation, the fix that didn’t work, and the one that passed—preserved together.

Explore the cases ↓How results are verified ↗
100840Executable case variants
20168Distinct failure mechanisms
302520Executed implementations
20168Open-access cases

WHAT THE ARCHIVE CONTAINS

100840 executable cases. 20168 are open.

Every case records the implementation that fails, the fix that did not work, and the repair that passed its checks—with recorded outputs and source hashes. This release adds 100840 cases across 20168 failure mechanisms and 254 domains.

The open tier gives you the failure and the unsuccessful fix for one case in every mechanism. The remaining 80672 cases, 5 variants per mechanism, are member-only: the verified repair, its recorded checks, and the full fixture suite are held in the member archive. Read the methodology ↗

A RECORD OF WHAT WENT WRONG

Browse the archive / 100840

Python · Standard library
REFERENCEFAILURE MECHANISMDOMAINACCESS
FA-30001

Cancellation of queued retries: Start identity violates retry transition semantics · case 01

Start identity violates retry transition semantics

HTTP retries● Open access↗FA-30002

Cancellation of queued retries: Start identity violates retry transition semantics · case 02

Start identity violates retry transition semantics

HTTP retries◈ Members↗FA-30003

Cancellation of queued retries: Start identity violates retry transition semantics · case 03

Start identity violates retry transition semantics

HTTP retries◈ Members↗FA-30004

Cancellation of queued retries: Start identity violates retry transition semantics · case 04

Start identity violates retry transition semantics

HTTP retries◈ Members↗FA-30005

Cancellation of queued retries: Start identity violates retry transition semantics · case 05

Start identity violates retry transition semantics

HTTP retries◈ Members↗FA-30006

Cancellation of queued retries: Finish gate violates retry transition semantics · case 01

Finish gate violates retry transition semantics

HTTP retries● Open access↗FA-30007

Cancellation of queued retries: Finish gate violates retry transition semantics · case 02

Finish gate violates retry transition semantics

HTTP retries◈ Members↗FA-30008

Cancellation of queued retries: Finish gate violates retry transition semantics · case 03

Finish gate violates retry transition semantics

HTTP retries◈ Members↗FA-30009

Cancellation of queued retries: Finish gate violates retry transition semantics · case 04

Finish gate violates retry transition semantics

HTTP retries◈ Members↗FA-30010

Cancellation of queued retries: Finish gate violates retry transition semantics · case 05

Finish gate violates retry transition semantics

HTTP retries◈ Members↗FA-30011

Cancellation of queued retries: Finish consumption violates retry transition semantics · case 01

Finish consumption violates retry transition semantics

HTTP retries● Open access↗FA-30012

Cancellation of queued retries: Finish consumption violates retry transition semantics · case 02

Finish consumption violates retry transition semantics

HTTP retries◈ Members↗FA-30013

Cancellation of queued retries: Finish consumption violates retry transition semantics · case 03

Finish consumption violates retry transition semantics

HTTP retries◈ Members↗FA-30014

Cancellation of queued retries: Finish consumption violates retry transition semantics · case 04

Finish consumption violates retry transition semantics

HTTP retries◈ Members↗FA-30015

Cancellation of queued retries: Finish consumption violates retry transition semantics · case 05

Finish consumption violates retry transition semantics

HTTP retries◈ Members↗FA-30016

Cancellation of queued retries: Finish identity violates retry transition semantics · case 01

Finish identity violates retry transition semantics

HTTP retries● Open access↗FA-30017

Cancellation of queued retries: Finish identity violates retry transition semantics · case 02

Finish identity violates retry transition semantics

HTTP retries◈ Members↗FA-30018

Cancellation of queued retries: Finish identity violates retry transition semantics · case 03

Finish identity violates retry transition semantics

HTTP retries◈ Members↗FA-30019

Cancellation of queued retries: Finish identity violates retry transition semantics · case 04

Finish identity violates retry transition semantics

HTTP retries◈ Members↗FA-30020

Cancellation of queued retries: Finish identity violates retry transition semantics · case 05

Finish identity violates retry transition semantics

HTTP retries◈ Members↗FA-30021

Idempotency receipt expiry during retry: Monotonic time violates retry transition semantics · case 01

Monotonic time violates retry transition semantics

HTTP retries● Open access↗FA-30022

Idempotency receipt expiry during retry: Monotonic time violates retry transition semantics · case 02

Monotonic time violates retry transition semantics

HTTP retries◈ Members↗FA-30023

Idempotency receipt expiry during retry: Monotonic time violates retry transition semantics · case 03

Monotonic time violates retry transition semantics

HTTP retries◈ Members↗FA-30024

Idempotency receipt expiry during retry: Monotonic time violates retry transition semantics · case 04

Monotonic time violates retry transition semantics

HTTP retries◈ Members↗FA-30025

Idempotency receipt expiry during retry: Monotonic time violates retry transition semantics · case 05

Monotonic time violates retry transition semantics

HTTP retries◈ Members↗FA-30026

Idempotency receipt expiry during retry: Expired replacement violates retry transition semantics · case 01

Expired replacement violates retry transition semantics

HTTP retries● Open access↗FA-30027

Idempotency receipt expiry during retry: Expired replacement violates retry transition semantics · case 02

Expired replacement violates retry transition semantics

HTTP retries◈ Members↗FA-30028

Idempotency receipt expiry during retry: Expired replacement violates retry transition semantics · case 03

Expired replacement violates retry transition semantics

HTTP retries◈ Members↗FA-30029

Idempotency receipt expiry during retry: Expired replacement violates retry transition semantics · case 04

Expired replacement violates retry transition semantics

HTTP retries◈ Members↗FA-30030

Idempotency receipt expiry during retry: Expired replacement violates retry transition semantics · case 05

Expired replacement violates retry transition semantics

HTTP retries◈ Members↗FA-30031

Idempotency receipt expiry during retry: Eviction state violates retry transition semantics · case 01

Eviction state violates retry transition semantics

HTTP retries● Open access↗FA-30032

Idempotency receipt expiry during retry: Eviction state violates retry transition semantics · case 02

Eviction state violates retry transition semantics

HTTP retries◈ Members↗FA-30033

Idempotency receipt expiry during retry: Eviction state violates retry transition semantics · case 03

Eviction state violates retry transition semantics

HTTP retries◈ Members↗FA-30034

Idempotency receipt expiry during retry: Eviction state violates retry transition semantics · case 04

Eviction state violates retry transition semantics

HTTP retries◈ Members↗FA-30035

Idempotency receipt expiry during retry: Eviction state violates retry transition semantics · case 05

Eviction state violates retry transition semantics

HTTP retries◈ Members↗FA-30036

Idempotency receipt expiry during retry: New expiry violates retry transition semantics · case 01

New expiry violates retry transition semantics

HTTP retries● Open access↗FA-30037

Idempotency receipt expiry during retry: New expiry violates retry transition semantics · case 02

New expiry violates retry transition semantics

HTTP retries◈ Members↗FA-30038

Idempotency receipt expiry during retry: New expiry violates retry transition semantics · case 03

New expiry violates retry transition semantics

HTTP retries◈ Members↗FA-30039

Idempotency receipt expiry during retry: New expiry violates retry transition semantics · case 04

New expiry violates retry transition semantics

HTTP retries◈ Members↗FA-30040

Idempotency receipt expiry during retry: New expiry violates retry transition semantics · case 05

New expiry violates retry transition semantics

HTTP retries◈ Members↗FA-30041

Idempotency receipt expiry during retry: Expiry storage violates retry transition semantics · case 01

Expiry storage violates retry transition semantics

HTTP retries● Open access↗FA-30042

Idempotency receipt expiry during retry: Expiry storage violates retry transition semantics · case 02

Expiry storage violates retry transition semantics

HTTP retries◈ Members↗FA-30043

Idempotency receipt expiry during retry: Expiry storage violates retry transition semantics · case 03

Expiry storage violates retry transition semantics

HTTP retries◈ Members↗FA-30044

Idempotency receipt expiry during retry: Expiry storage violates retry transition semantics · case 04

Expiry storage violates retry transition semantics

HTTP retries◈ Members↗FA-30045

Idempotency receipt expiry during retry: Expiry storage violates retry transition semantics · case 05

Expiry storage violates retry transition semantics

HTTP retries◈ Members↗FA-30046

Idempotency receipt expiry during retry: Commit live violates retry transition semantics · case 01

Commit live violates retry transition semantics

HTTP retries● Open access↗FA-30047

Idempotency receipt expiry during retry: Commit live violates retry transition semantics · case 02

Commit live violates retry transition semantics

HTTP retries◈ Members↗FA-30048

Idempotency receipt expiry during retry: Commit live violates retry transition semantics · case 03

Commit live violates retry transition semantics

HTTP retries◈ Members↗FA-30049

Idempotency receipt expiry during retry: Commit live violates retry transition semantics · case 04

Commit live violates retry transition semantics

HTTP retries◈ Members↗FA-30050

Idempotency receipt expiry during retry: Commit live violates retry transition semantics · case 05

Commit live violates retry transition semantics

HTTP retries◈ Members↗FA-30051

Idempotency receipt expiry during retry: Lookup expired violates retry transition semantics · case 01

Lookup expired violates retry transition semantics

HTTP retries● Open access↗FA-30052

Idempotency receipt expiry during retry: Lookup expired violates retry transition semantics · case 02

Lookup expired violates retry transition semantics

HTTP retries◈ Members↗FA-30053

Idempotency receipt expiry during retry: Lookup expired violates retry transition semantics · case 03

Lookup expired violates retry transition semantics

HTTP retries◈ Members↗FA-30054

Idempotency receipt expiry during retry: Lookup expired violates retry transition semantics · case 04

Lookup expired violates retry transition semantics

HTTP retries◈ Members↗FA-30055

Idempotency receipt expiry during retry: Lookup expired violates retry transition semantics · case 05

Lookup expired violates retry transition semantics

HTTP retries◈ Members↗FA-30056

File-backed request replay integrity: Identity snapshot violates retry transition semantics · case 01

Identity snapshot violates retry transition semantics

HTTP retries● Open access↗FA-30057

File-backed request replay integrity: Identity snapshot violates retry transition semantics · case 02

Identity snapshot violates retry transition semantics

HTTP retries◈ Members↗FA-30058

File-backed request replay integrity: Identity snapshot violates retry transition semantics · case 03

Identity snapshot violates retry transition semantics

HTTP retries◈ Members↗FA-30059

File-backed request replay integrity: Identity snapshot violates retry transition semantics · case 04

Identity snapshot violates retry transition semantics

HTTP retries◈ Members↗FA-30060

File-backed request replay integrity: Identity snapshot violates retry transition semantics · case 05

Identity snapshot violates retry transition semantics

HTTP retries◈ Members↗FA-30061

File-backed request replay integrity: Open valid violates retry transition semantics · case 01

Open valid violates retry transition semantics

HTTP retries● Open access↗FA-30062

File-backed request replay integrity: Open valid violates retry transition semantics · case 02

Open valid violates retry transition semantics

HTTP retries◈ Members↗FA-30063

File-backed request replay integrity: Open valid violates retry transition semantics · case 03

Open valid violates retry transition semantics

HTTP retries◈ Members↗FA-30064

File-backed request replay integrity: Open valid violates retry transition semantics · case 04

Open valid violates retry transition semantics

HTTP retries◈ Members↗FA-30065

File-backed request replay integrity: Open valid violates retry transition semantics · case 05

Open valid violates retry transition semantics

HTTP retries◈ Members↗FA-30066

File-backed request replay integrity: Inspect full violates retry transition semantics · case 01

Inspect full violates retry transition semantics

HTTP retries● Open access↗FA-30067

File-backed request replay integrity: Inspect full violates retry transition semantics · case 02

Inspect full violates retry transition semantics

HTTP retries◈ Members↗FA-30068

File-backed request replay integrity: Inspect full violates retry transition semantics · case 03

Inspect full violates retry transition semantics

HTTP retries◈ Members↗FA-30069

File-backed request replay integrity: Inspect full violates retry transition semantics · case 04

Inspect full violates retry transition semantics

HTTP retries◈ Members↗FA-30070

File-backed request replay integrity: Inspect full violates retry transition semantics · case 05

Inspect full violates retry transition semantics

HTTP retries◈ Members↗FA-30071

File-backed request replay integrity: Read bound violates retry transition semantics · case 01

Read bound violates retry transition semantics

HTTP retries● Open access↗FA-30072

File-backed request replay integrity: Read bound violates retry transition semantics · case 02

Read bound violates retry transition semantics

HTTP retries◈ Members↗FA-30073

File-backed request replay integrity: Read bound violates retry transition semantics · case 03

Read bound violates retry transition semantics

HTTP retries◈ Members↗FA-30074

File-backed request replay integrity: Read bound violates retry transition semantics · case 04

Read bound violates retry transition semantics

HTTP retries◈ Members↗FA-30075

File-backed request replay integrity: Read bound violates retry transition semantics · case 05

Read bound violates retry transition semantics

HTTP retries◈ Members↗FA-30076

File-backed request replay integrity: Identity check violates retry transition semantics · case 01

Identity check violates retry transition semantics

HTTP retries● Open access↗FA-30077

File-backed request replay integrity: Identity check violates retry transition semantics · case 02

Identity check violates retry transition semantics

HTTP retries◈ Members↗FA-30078

File-backed request replay integrity: Identity check violates retry transition semantics · case 03

Identity check violates retry transition semantics

HTTP retries◈ Members↗FA-30079

File-backed request replay integrity: Identity check violates retry transition semantics · case 04

Identity check violates retry transition semantics

HTTP retries◈ Members↗FA-30080

File-backed request replay integrity: Identity check violates retry transition semantics · case 05

Identity check violates retry transition semantics

HTTP retries◈ Members↗FA-30081

File-backed request replay integrity: Mtime check violates retry transition semantics · case 01

Mtime check violates retry transition semantics

HTTP retries● Open access↗FA-30082

File-backed request replay integrity: Mtime check violates retry transition semantics · case 02

Mtime check violates retry transition semantics

HTTP retries◈ Members↗FA-30083

File-backed request replay integrity: Mtime check violates retry transition semantics · case 03

Mtime check violates retry transition semantics

HTTP retries◈ Members↗FA-30084

File-backed request replay integrity: Mtime check violates retry transition semantics · case 04

Mtime check violates retry transition semantics

HTTP retries◈ Members↗FA-30085

File-backed request replay integrity: Mtime check violates retry transition semantics · case 05

Mtime check violates retry transition semantics

HTTP retries◈ Members↗FA-30086

File-backed request replay integrity: Invalidate changed violates retry transition semantics · case 01

Invalidate changed violates retry transition semantics

HTTP retries● Open access↗FA-30087

File-backed request replay integrity: Invalidate changed violates retry transition semantics · case 02

Invalidate changed violates retry transition semantics

HTTP retries◈ Members↗FA-30088

File-backed request replay integrity: Invalidate changed violates retry transition semantics · case 03

Invalidate changed violates retry transition semantics

HTTP retries◈ Members↗FA-30089

File-backed request replay integrity: Invalidate changed violates retry transition semantics · case 04

Invalidate changed violates retry transition semantics

HTTP retries◈ Members↗FA-30090

File-backed request replay integrity: Invalidate changed violates retry transition semantics · case 05

Invalidate changed violates retry transition semantics

HTTP retries◈ Members↗FA-30091

File-backed request replay integrity: Size check violates retry transition semantics · case 01

Size check violates retry transition semantics

HTTP retries● Open access↗FA-30092

File-backed request replay integrity: Size check violates retry transition semantics · case 02

Size check violates retry transition semantics

HTTP retries◈ Members↗FA-30093

File-backed request replay integrity: Size check violates retry transition semantics · case 03

Size check violates retry transition semantics

HTTP retries◈ Members↗FA-30094

File-backed request replay integrity: Size check violates retry transition semantics · case 04

Size check violates retry transition semantics

HTTP retries◈ Members↗FA-30095

File-backed request replay integrity: Size check violates retry transition semantics · case 05

Size check violates retry transition semantics

HTTP retries◈ Members↗FA-30096

Failed response disposal and pool eligibility: Remaining length violates retry transition semantics · case 01

Remaining length violates retry transition semantics

HTTP retries● Open access↗FA-30097

Failed response disposal and pool eligibility: Remaining length violates retry transition semantics · case 02

Remaining length violates retry transition semantics

HTTP retries◈ Members↗FA-30098

Failed response disposal and pool eligibility: Remaining length violates retry transition semantics · case 03

Remaining length violates retry transition semantics

HTTP retries◈ Members↗FA-30099

Failed response disposal and pool eligibility: Remaining length violates retry transition semantics · case 04

Remaining length violates retry transition semantics

HTTP retries◈ Members↗FA-30100

Failed response disposal and pool eligibility: Remaining length violates retry transition semantics · case 05

Remaining length violates retry transition semantics

HTTP retries◈ Members↗

INSPECTABLE BY DESIGN

Every result has a runnable source.

Runnable implementations with recorded outputs, source hashes, and explicit contracts. Related variants share a failure mechanism and belong together in evaluation splits.

Read the methodology ↗