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
Two source columns bind to one canonical schema position · case 01
A structured table violates the declared record or column contract.
Two source columns bind to one canonical schema position · case 02
A structured table violates the declared record or column contract.
Two source columns bind to one canonical schema position · case 03
A structured table violates the declared record or column contract.
Two source columns bind to one canonical schema position · case 04
A structured table violates the declared record or column contract.
Two source columns bind to one canonical schema position · case 05
A structured table violates the declared record or column contract.
A partial alias mapping is accepted as a complete schema · case 01
A structured table violates the declared record or column contract.
A partial alias mapping is accepted as a complete schema · case 02
A structured table violates the declared record or column contract.
A partial alias mapping is accepted as a complete schema · case 03
A structured table violates the declared record or column contract.
A partial alias mapping is accepted as a complete schema · case 04
A structured table violates the declared record or column contract.
A partial alias mapping is accepted as a complete schema · case 05
A structured table violates the declared record or column contract.
Alias resolution returns canonical indexes in physical order · case 01
A structured table violates the declared record or column contract.
Alias resolution returns canonical indexes in physical order · case 02
A structured table violates the declared record or column contract.
Alias resolution returns canonical indexes in physical order · case 03
A structured table violates the declared record or column contract.
Alias resolution returns canonical indexes in physical order · case 04
A structured table violates the declared record or column contract.
Alias resolution returns canonical indexes in physical order · case 05
A structured table violates the declared record or column contract.
A one-based row selector starts one physical record late · case 01
A structured table violates the declared record or column contract.
A one-based row selector starts one physical record late · case 02
A structured table violates the declared record or column contract.
A one-based row selector starts one physical record late · case 03
A structured table violates the declared record or column contract.
A one-based row selector starts one physical record late · case 04
A structured table violates the declared record or column contract.
A one-based row selector starts one physical record late · case 05
A structured table violates the declared record or column contract.
A one-based column selector begins at the wrong field · case 01
A structured table violates the declared record or column contract.
A one-based column selector begins at the wrong field · case 02
A structured table violates the declared record or column contract.
A one-based column selector begins at the wrong field · case 03
A structured table violates the declared record or column contract.
A one-based column selector begins at the wrong field · case 04
A structured table violates the declared record or column contract.
A one-based column selector begins at the wrong field · case 05
A structured table violates the declared record or column contract.
An inclusive row endpoint is treated as an exclusive count · case 01
A structured table violates the declared record or column contract.
An inclusive row endpoint is treated as an exclusive count · case 02
A structured table violates the declared record or column contract.
An inclusive row endpoint is treated as an exclusive count · case 03
A structured table violates the declared record or column contract.
An inclusive row endpoint is treated as an exclusive count · case 04
A structured table violates the declared record or column contract.
An inclusive row endpoint is treated as an exclusive count · case 05
A structured table violates the declared record or column contract.
An inclusive column endpoint omits its last requested cell · case 01
A structured table violates the declared record or column contract.
An inclusive column endpoint omits its last requested cell · case 02
A structured table violates the declared record or column contract.
An inclusive column endpoint omits its last requested cell · case 03
A structured table violates the declared record or column contract.
An inclusive column endpoint omits its last requested cell · case 04
A structured table violates the declared record or column contract.
An inclusive column endpoint omits its last requested cell · case 05
A structured table violates the declared record or column contract.
Projection validates only selected row widths · case 01
A structured table violates the declared record or column contract.
Projection validates only selected row widths · case 02
A structured table violates the declared record or column contract.
Projection validates only selected row widths · case 03
A structured table violates the declared record or column contract.
Projection validates only selected row widths · case 04
A structured table violates the declared record or column contract.
Projection validates only selected row widths · case 05
A structured table violates the declared record or column contract.
A BOM hides the delimiter preamble · case 01
A structured table violates the declared record or column contract.
A BOM hides the delimiter preamble · case 02
A structured table violates the declared record or column contract.
A BOM hides the delimiter preamble · case 03
A structured table violates the declared record or column contract.
A BOM hides the delimiter preamble · case 04
A structured table violates the declared record or column contract.
A BOM hides the delimiter preamble · case 05
A structured table violates the declared record or column contract.
The separator preamble is emitted as a data row · case 01
A structured table violates the declared record or column contract.
The separator preamble is emitted as a data row · case 02
A structured table violates the declared record or column contract.
The separator preamble is emitted as a data row · case 03
A structured table violates the declared record or column contract.
The separator preamble is emitted as a data row · case 04
A structured table violates the declared record or column contract.
The separator preamble is emitted as a data row · case 05
A structured table violates the declared record or column contract.
The preamble parser includes the equals sign in its delimiter · case 01
A structured table violates the declared record or column contract.
The preamble parser includes the equals sign in its delimiter · case 02
A structured table violates the declared record or column contract.
The preamble parser includes the equals sign in its delimiter · case 03
A structured table violates the declared record or column contract.
The preamble parser includes the equals sign in its delimiter · case 04
A structured table violates the declared record or column contract.
The preamble parser includes the equals sign in its delimiter · case 05
A structured table violates the declared record or column contract.
A valid preamble is ignored by subsequent row splitting · case 01
A structured table violates the declared record or column contract.
A valid preamble is ignored by subsequent row splitting · case 02
A structured table violates the declared record or column contract.
A valid preamble is ignored by subsequent row splitting · case 03
A structured table violates the declared record or column contract.
A valid preamble is ignored by subsequent row splitting · case 04
A structured table violates the declared record or column contract.
A valid preamble is ignored by subsequent row splitting · case 05
A structured table violates the declared record or column contract.
A separator preamble permits quote as a delimiter · case 01
A structured table violates the declared record or column contract.
A separator preamble permits quote as a delimiter · case 02
A structured table violates the declared record or column contract.
A separator preamble permits quote as a delimiter · case 03
A structured table violates the declared record or column contract.
A separator preamble permits quote as a delimiter · case 04
A structured table violates the declared record or column contract.
A separator preamble permits quote as a delimiter · case 05
A structured table violates the declared record or column contract.
A body tag is exposed as an additional data cell · case 01
A structured table violates the declared record or column contract.
A body tag is exposed as an additional data cell · case 02
A structured table violates the declared record or column contract.
A body tag is exposed as an additional data cell · case 03
A structured table violates the declared record or column contract.
A body tag is exposed as an additional data cell · case 04
A structured table violates the declared record or column contract.
A body tag is exposed as an additional data cell · case 05
A structured table violates the declared record or column contract.
Footer verification counts the header as a body record · case 01
A structured table violates the declared record or column contract.
Footer verification counts the header as a body record · case 02
A structured table violates the declared record or column contract.
Footer verification counts the header as a body record · case 03
A structured table violates the declared record or column contract.
Footer verification counts the header as a body record · case 04
A structured table violates the declared record or column contract.
Footer verification counts the header as a body record · case 05
A structured table violates the declared record or column contract.
A footer does not prevent later data records · case 01
A structured table violates the declared record or column contract.
A footer does not prevent later data records · case 02
A structured table violates the declared record or column contract.
A footer does not prevent later data records · case 03
A structured table violates the declared record or column contract.
A footer does not prevent later data records · case 04
A structured table violates the declared record or column contract.
A footer does not prevent later data records · case 05
A structured table violates the declared record or column contract.
A partial table without its footer is committed · case 01
A structured table violates the declared record or column contract.
A partial table without its footer is committed · case 02
A structured table violates the declared record or column contract.
A partial table without its footer is committed · case 03
A structured table violates the declared record or column contract.
A partial table without its footer is committed · case 04
A structured table violates the declared record or column contract.
A partial table without its footer is committed · case 05
A structured table violates the declared record or column contract.
Unknown record tags are treated as harmless metadata · case 01
A structured table violates the declared record or column contract.
Unknown record tags are treated as harmless metadata · case 02
A structured table violates the declared record or column contract.
Unknown record tags are treated as harmless metadata · case 03
A structured table violates the declared record or column contract.
Unknown record tags are treated as harmless metadata · case 04
A structured table violates the declared record or column contract.
Unknown record tags are treated as harmless metadata · case 05
A structured table violates the declared record or column contract.
An empty list cell is decoded as one empty element · case 01
A structured table violates the declared record or column contract.
An empty list cell is decoded as one empty element · case 02
A structured table violates the declared record or column contract.
An empty list cell is decoded as one empty element · case 03
A structured table violates the declared record or column contract.
An empty list cell is decoded as one empty element · case 04
A structured table violates the declared record or column contract.
An empty list cell is decoded as one empty element · case 05
A structured table violates the declared record or column contract.
Empty positions inside a list cell disappear · case 01
A structured table violates the declared record or column contract.
Empty positions inside a list cell disappear · case 02
A structured table violates the declared record or column contract.
Empty positions inside a list cell disappear · case 03
A structured table violates the declared record or column contract.
Empty positions inside a list cell disappear · case 04
A structured table violates the declared record or column contract.
Empty positions inside a list cell disappear · 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 ↗