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 ↗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
TSV fields retain the previous column buffer · case 01
A structured table violates the declared record or column contract.
TSV fields retain the previous column buffer · case 02
A structured table violates the declared record or column contract.
TSV fields retain the previous column buffer · case 03
A structured table violates the declared record or column contract.
TSV fields retain the previous column buffer · case 04
A structured table violates the declared record or column contract.
TSV fields retain the previous column buffer · case 05
A structured table violates the declared record or column contract.
Raw newlines are accepted inside a one-record TSV API · case 01
A structured table violates the declared record or column contract.
Raw newlines are accepted inside a one-record TSV API · case 02
A structured table violates the declared record or column contract.
Raw newlines are accepted inside a one-record TSV API · case 03
A structured table violates the declared record or column contract.
Raw newlines are accepted inside a one-record TSV API · case 04
A structured table violates the declared record or column contract.
Raw newlines are accepted inside a one-record TSV API · case 05
A structured table violates the declared record or column contract.
TSV EOF drops an unfinished escape introducer · case 01
A structured table violates the declared record or column contract.
TSV EOF drops an unfinished escape introducer · case 02
A structured table violates the declared record or column contract.
TSV EOF drops an unfinished escape introducer · case 03
A structured table violates the declared record or column contract.
TSV EOF drops an unfinished escape introducer · case 04
A structured table violates the declared record or column contract.
TSV EOF drops an unfinished escape introducer · case 05
A structured table violates the declared record or column contract.
A TSV writer leaves literal escape prefixes ambiguous · case 01
A structured table violates the declared record or column contract.
A TSV writer leaves literal escape prefixes ambiguous · case 02
A structured table violates the declared record or column contract.
A TSV writer leaves literal escape prefixes ambiguous · case 03
A structured table violates the declared record or column contract.
A TSV writer leaves literal escape prefixes ambiguous · case 04
A structured table violates the declared record or column contract.
A TSV writer leaves literal escape prefixes ambiguous · case 05
A structured table violates the declared record or column contract.
A cell tab becomes an extra TSV column · case 01
A structured table violates the declared record or column contract.
A cell tab becomes an extra TSV column · case 02
A structured table violates the declared record or column contract.
A cell tab becomes an extra TSV column · case 03
A structured table violates the declared record or column contract.
A cell tab becomes an extra TSV column · case 04
A structured table violates the declared record or column contract.
A cell tab becomes an extra TSV column · case 05
A structured table violates the declared record or column contract.
A cell line feed becomes an extra physical TSV record · case 01
A structured table violates the declared record or column contract.
A cell line feed becomes an extra physical TSV record · case 02
A structured table violates the declared record or column contract.
A cell line feed becomes an extra physical TSV record · case 03
A structured table violates the declared record or column contract.
A cell line feed becomes an extra physical TSV record · case 04
A structured table violates the declared record or column contract.
A cell line feed becomes an extra physical TSV record · case 05
A structured table violates the declared record or column contract.
Carriage returns remain structural in escaped TSV · case 01
A structured table violates the declared record or column contract.
Carriage returns remain structural in escaped TSV · case 02
A structured table violates the declared record or column contract.
Carriage returns remain structural in escaped TSV · case 03
A structured table violates the declared record or column contract.
Carriage returns remain structural in escaped TSV · case 04
A structured table violates the declared record or column contract.
Carriage returns remain structural in escaped TSV · case 05
A structured table violates the declared record or column contract.
TSV joining omits explicit empty columns · case 01
A structured table violates the declared record or column contract.
TSV joining omits explicit empty columns · case 02
A structured table violates the declared record or column contract.
TSV joining omits explicit empty columns · case 03
A structured table violates the declared record or column contract.
TSV joining omits explicit empty columns · case 04
A structured table violates the declared record or column contract.
TSV joining omits explicit empty columns · case 05
A structured table violates the declared record or column contract.
A quoted null marker is coerced to missing data · case 01
A structured table violates the declared record or column contract.
A quoted null marker is coerced to missing data · case 02
A structured table violates the declared record or column contract.
A quoted null marker is coerced to missing data · case 03
A structured table violates the declared record or column contract.
A quoted null marker is coerced to missing data · case 04
A structured table violates the declared record or column contract.
A quoted null marker is coerced to missing data · case 05
A structured table violates the declared record or column contract.
An intentionally empty quoted cell becomes absent · case 01
A structured table violates the declared record or column contract.
An intentionally empty quoted cell becomes absent · case 02
A structured table violates the declared record or column contract.
An intentionally empty quoted cell becomes absent · case 03
A structured table violates the declared record or column contract.
An intentionally empty quoted cell becomes absent · case 04
A structured table violates the declared record or column contract.
An intentionally empty quoted cell becomes absent · case 05
A structured table violates the declared record or column contract.
A quoted default directive is executed as metadata · case 01
A structured table violates the declared record or column contract.
A quoted default directive is executed as metadata · case 02
A structured table violates the declared record or column contract.
A quoted default directive is executed as metadata · case 03
A structured table violates the declared record or column contract.
A quoted default directive is executed as metadata · case 04
A structured table violates the declared record or column contract.
A quoted default directive is executed as metadata · case 05
A structured table violates the declared record or column contract.
A default directive emits its field name instead of value · case 01
A structured table violates the declared record or column contract.
A default directive emits its field name instead of value · case 02
A structured table violates the declared record or column contract.
A default directive emits its field name instead of value · case 03
A structured table violates the declared record or column contract.
A default directive emits its field name instead of value · case 04
A structured table violates the declared record or column contract.
A default directive emits its field name instead of value · case 05
A structured table violates the declared record or column contract.
Ordinary null-aware cells are normalized destructively · case 01
A structured table violates the declared record or column contract.
Ordinary null-aware cells are normalized destructively · case 02
A structured table violates the declared record or column contract.
Ordinary null-aware cells are normalized destructively · case 03
A structured table violates the declared record or column contract.
Ordinary null-aware cells are normalized destructively · case 04
A structured table violates the declared record or column contract.
Ordinary null-aware cells are normalized destructively · case 05
A structured table violates the declared record or column contract.
A quoted cell loses its lexical origin · case 01
A structured table violates the declared record or column contract.
A quoted cell loses its lexical origin · case 02
A structured table violates the declared record or column contract.
A quoted cell loses its lexical origin · case 03
A structured table violates the declared record or column contract.
A quoted cell loses its lexical origin · case 04
A structured table violates the declared record or column contract.
A quoted cell loses its lexical origin · case 05
A structured table violates the declared record or column contract.
An escaped quote closes a field prematurely · case 01
A structured table violates the declared record or column contract.
An escaped quote closes a field prematurely · case 02
A structured table violates the declared record or column contract.
An escaped quote closes a field prematurely · case 03
A structured table violates the declared record or column contract.
An escaped quote closes a field prematurely · case 04
A structured table violates the declared record or column contract.
An escaped quote closes a field prematurely · case 05
A structured table violates the declared record or column contract.
An escaped quote is removed from the field payload · case 01
A structured table violates the declared record or column contract.
An escaped quote is removed from the field payload · case 02
A structured table violates the declared record or column contract.
An escaped quote is removed from the field payload · case 03
A structured table violates the declared record or column contract.
An escaped quote is removed from the field payload · case 04
A structured table violates the declared record or column contract.
An escaped quote is removed from the field payload · case 05
A structured table violates the declared record or column contract.
Text after a closing quote is silently discarded · case 01
A structured table violates the declared record or column contract.
Text after a closing quote is silently discarded · case 02
A structured table violates the declared record or column contract.
Text after a closing quote is silently discarded · case 03
A structured table violates the declared record or column contract.
Text after a closing quote is silently discarded · case 04
A structured table violates the declared record or column contract.
Text after a closing quote is silently discarded · case 05
A structured table violates the declared record or column contract.
A following bare field inherits the prior quoted flag · case 01
A structured table violates the declared record or column contract.
A following bare field inherits the prior quoted flag · case 02
A structured table violates the declared record or column contract.
A following bare field inherits the prior quoted flag · case 03
A structured table violates the declared record or column contract.
A following bare field inherits the prior quoted flag · case 04
A structured table violates the declared record or column contract.
A following bare field inherits the prior quoted flag · case 05
A structured table violates the declared record or column contract.
An ordinary character fails to leave field-start state · case 01
A structured table violates the declared record or column contract.
An ordinary character fails to leave field-start state · case 02
A structured table violates the declared record or column contract.
An ordinary character fails to leave field-start state · case 03
A structured table violates the declared record or column contract.
An ordinary character fails to leave field-start state · case 04
A structured table violates the declared record or column contract.
An ordinary character fails to leave field-start state · case 05
A structured table violates the declared record or column contract.
EOF omits the final empty CSV cell · case 01
A structured table violates the declared record or column contract.
EOF omits the final empty CSV cell · case 02
A structured table violates the declared record or column contract.
EOF omits the final empty CSV cell · case 03
A structured table violates the declared record or column contract.
EOF omits the final empty CSV cell · case 04
A structured table violates the declared record or column contract.
EOF omits the final empty CSV cell · case 05
A structured table violates the declared record or column contract.
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 ↗