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
A missing column uses another column default · case 01
A structured table violates the declared record or column contract.
A missing column uses another column default · case 02
A structured table violates the declared record or column contract.
A missing column uses another column default · case 03
A structured table violates the declared record or column contract.
A missing column uses another column default · case 04
A structured table violates the declared record or column contract.
A missing column uses another column default · case 05
A structured table violates the declared record or column contract.
Default application coerces structured values to text · case 01
A structured table violates the declared record or column contract.
Default application coerces structured values to text · case 02
A structured table violates the declared record or column contract.
Default application coerces structured values to text · case 03
A structured table violates the declared record or column contract.
Default application coerces structured values to text · case 04
A structured table violates the declared record or column contract.
Default application coerces structured values to text · case 05
A structured table violates the declared record or column contract.
Default filling silently discards unexpected source columns · case 01
A structured table violates the declared record or column contract.
Default filling silently discards unexpected source columns · case 02
A structured table violates the declared record or column contract.
Default filling silently discards unexpected source columns · case 03
A structured table violates the declared record or column contract.
Default filling silently discards unexpected source columns · case 04
A structured table violates the declared record or column contract.
Default filling silently discards unexpected source columns · case 05
A structured table violates the declared record or column contract.
Formula screening ignores leading whitespace · case 01
A structured table violates the declared record or column contract.
Formula screening ignores leading whitespace · case 02
A structured table violates the declared record or column contract.
Formula screening ignores leading whitespace · case 03
A structured table violates the declared record or column contract.
Formula screening ignores leading whitespace · case 04
A structured table violates the declared record or column contract.
Formula screening ignores leading whitespace · case 05
A structured table violates the declared record or column contract.
Formula neutralization inserts its marker after leading whitespace · case 01
A structured table violates the declared record or column contract.
Formula neutralization inserts its marker after leading whitespace · case 02
A structured table violates the declared record or column contract.
Formula neutralization inserts its marker after leading whitespace · case 03
A structured table violates the declared record or column contract.
Formula neutralization inserts its marker after leading whitespace · case 04
A structured table violates the declared record or column contract.
Formula neutralization inserts its marker after leading whitespace · case 05
A structured table violates the declared record or column contract.
An existing literal-prefix marker is duplicated · case 01
A structured table violates the declared record or column contract.
An existing literal-prefix marker is duplicated · case 02
A structured table violates the declared record or column contract.
An existing literal-prefix marker is duplicated · case 03
A structured table violates the declared record or column contract.
An existing literal-prefix marker is duplicated · case 04
A structured table violates the declared record or column contract.
An existing literal-prefix marker is duplicated · case 05
A structured table violates the declared record or column contract.
An ordinary interior operator triggers formula neutralization · case 01
A structured table violates the declared record or column contract.
An ordinary interior operator triggers formula neutralization · case 02
A structured table violates the declared record or column contract.
An ordinary interior operator triggers formula neutralization · case 03
A structured table violates the declared record or column contract.
An ordinary interior operator triggers formula neutralization · case 04
A structured table violates the declared record or column contract.
An ordinary interior operator triggers formula neutralization · case 05
A structured table violates the declared record or column contract.
CSV quote escaping drops the formula-neutralization marker · case 01
A structured table violates the declared record or column contract.
CSV quote escaping drops the formula-neutralization marker · case 02
A structured table violates the declared record or column contract.
CSV quote escaping drops the formula-neutralization marker · case 03
A structured table violates the declared record or column contract.
CSV quote escaping drops the formula-neutralization marker · case 04
A structured table violates the declared record or column contract.
CSV quote escaping drops the formula-neutralization marker · case 05
A structured table violates the declared record or column contract.
A marker inside quoted data starts a trailing comment · case 01
A structured table violates the declared record or column contract.
A marker inside quoted data starts a trailing comment · case 02
A structured table violates the declared record or column contract.
A marker inside quoted data starts a trailing comment · case 03
A structured table violates the declared record or column contract.
A marker inside quoted data starts a trailing comment · case 04
A structured table violates the declared record or column contract.
A marker inside quoted data starts a trailing comment · case 05
A structured table violates the declared record or column contract.
A comment body is resumed as ordinary row text · case 01
A structured table violates the declared record or column contract.
A comment body is resumed as ordinary row text · case 02
A structured table violates the declared record or column contract.
A comment body is resumed as ordinary row text · case 03
A structured table violates the declared record or column contract.
A comment body is resumed as ordinary row text · case 04
A structured table violates the declared record or column contract.
A comment body is resumed as ordinary row text · case 05
A structured table violates the declared record or column contract.
Whitespace before a comment is removed from the final field · case 01
A structured table violates the declared record or column contract.
Whitespace before a comment is removed from the final field · case 02
A structured table violates the declared record or column contract.
Whitespace before a comment is removed from the final field · case 03
A structured table violates the declared record or column contract.
Whitespace before a comment is removed from the final field · case 04
A structured table violates the declared record or column contract.
Whitespace before a comment is removed from the final field · case 05
A structured table violates the declared record or column contract.
The second quote of an escaped pair is revisited as syntax · case 01
A structured table violates the declared record or column contract.
The second quote of an escaped pair is revisited as syntax · case 02
A structured table violates the declared record or column contract.
The second quote of an escaped pair is revisited as syntax · case 03
A structured table violates the declared record or column contract.
The second quote of an escaped pair is revisited as syntax · case 04
A structured table violates the declared record or column contract.
The second quote of an escaped pair is revisited as syntax · case 05
A structured table violates the declared record or column contract.
An open quoted comment-looking field is accepted at EOF · case 01
A structured table violates the declared record or column contract.
An open quoted comment-looking field is accepted at EOF · case 02
A structured table violates the declared record or column contract.
An open quoted comment-looking field is accepted at EOF · case 03
A structured table violates the declared record or column contract.
An open quoted comment-looking field is accepted at EOF · case 04
A structured table violates the declared record or column contract.
An open quoted comment-looking field is accepted at EOF · case 05
A structured table violates the declared record or column contract.
A variadic column consumes the trailing fixed field · case 01
A structured table violates the declared record or column contract.
A variadic column consumes the trailing fixed field · case 02
A structured table violates the declared record or column contract.
A variadic column consumes the trailing fixed field · case 03
A structured table violates the declared record or column contract.
A variadic column consumes the trailing fixed field · case 04
A structured table violates the declared record or column contract.
A variadic column consumes the trailing fixed field · case 05
A structured table violates the declared record or column contract.
The first variadic field is lost at the rest boundary · case 01
A structured table violates the declared record or column contract.
The first variadic field is lost at the rest boundary · case 02
A structured table violates the declared record or column contract.
The first variadic field is lost at the rest boundary · case 03
A structured table violates the declared record or column contract.
The first variadic field is lost at the rest boundary · case 04
A structured table violates the declared record or column contract.
The first variadic field is lost at the rest boundary · case 05
A structured table violates the declared record or column contract.
A variadic field is flattened into one delimited scalar · case 01
A structured table violates the declared record or column contract.
A variadic field is flattened into one delimited scalar · case 02
A structured table violates the declared record or column contract.
A variadic field is flattened into one delimited scalar · case 03
A structured table violates the declared record or column contract.
A variadic field is flattened into one delimited scalar · case 04
A structured table violates the declared record or column contract.
A variadic field is flattened into one delimited scalar · case 05
A structured table violates the declared record or column contract.
The trailing fixed field uses a schema index instead of the final physical index · case 01
A structured table violates the declared record or column contract.
The trailing fixed field uses a schema index instead of the final physical index · case 02
A structured table violates the declared record or column contract.
The trailing fixed field uses a schema index instead of the final physical index · case 03
A structured table violates the declared record or column contract.
The trailing fixed field uses a schema index instead of the final physical index · case 04
A structured table violates the declared record or column contract.
The trailing fixed field uses a schema index instead of the final physical index · case 05
A structured table violates the declared record or column contract.
An explicit empty variadic cell is omitted · case 01
A structured table violates the declared record or column contract.
An explicit empty variadic cell is omitted · case 02
A structured table violates the declared record or column contract.
An explicit empty variadic cell is omitted · case 03
A structured table violates the declared record or column contract.
An explicit empty variadic cell is omitted · case 04
A structured table violates the declared record or column contract.
An explicit empty variadic cell is omitted · case 05
A structured table violates the declared record or column contract.
Transpose width is taken only from the first record · case 01
A structured table violates the declared record or column contract.
Transpose width is taken only from the first record · case 02
A structured table violates the declared record or column contract.
Transpose width is taken only from the first record · case 03
A structured table violates the declared record or column contract.
Transpose width is taken only from the first record · case 04
A structured table violates the declared record or column contract.
Transpose width is taken only from the first record · case 05
A structured table violates the declared record or column contract.
Missing trailing fields become explicit empty strings · case 01
A structured table violates the declared record or column contract.
Missing trailing fields become explicit empty strings · case 02
A structured table violates the declared record or column contract.
Missing trailing fields become explicit empty strings · case 03
A structured table violates the declared record or column contract.
Missing trailing fields become explicit empty strings · case 04
A structured table violates the declared record or column contract.
Missing trailing fields become explicit empty strings · 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 ↗