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
Quarterly and annual report due dates for a fiscal year: quarter month · case 01
A June fiscal year gets quarterly deadlines based on calendar quarters.
Quarterly and annual report due dates for a fiscal year: quarter month · case 02
A June fiscal year gets quarterly deadlines based on calendar quarters.
Quarterly and annual report due dates for a fiscal year: quarter month · case 03
A June fiscal year gets quarterly deadlines based on calendar quarters.
Quarterly and annual report due dates for a fiscal year: quarter month · case 04
A June fiscal year gets quarterly deadlines based on calendar quarters.
Quarterly and annual report due dates for a fiscal year: quarter month · case 05
A June fiscal year gets quarterly deadlines based on calendar quarters.
Quarterly and annual report due dates for a fiscal year: month end day · case 01
Quarters ending in 31-day months are treated as ending on the 30th.
Quarterly and annual report due dates for a fiscal year: month end day · case 02
Quarters ending in 31-day months are treated as ending on the 30th.
Quarterly and annual report due dates for a fiscal year: month end day · case 03
Quarters ending in 31-day months are treated as ending on the 30th.
Quarterly and annual report due dates for a fiscal year: month end day · case 04
Quarters ending in 31-day months are treated as ending on the 30th.
Quarterly and annual report due dates for a fiscal year: month end day · case 05
Quarters ending in 31-day months are treated as ending on the 30th.
Limitations period tolled during minority: majority leap · case 01
A claimant born on February 29 is treated as an adult on February 28.
Limitations period tolled during minority: majority leap · case 02
A claimant born on February 29 is treated as an adult on February 28.
Limitations period tolled during minority: majority leap · case 03
A claimant born on February 29 is treated as an adult on February 28.
Limitations period tolled during minority: majority leap · case 04
A claimant born on February 29 is treated as an adult on February 28.
Limitations period tolled during minority: majority leap · case 05
A claimant born on February 29 is treated as an adult on February 28.
Limitations period tolled during minority: minority start · case 01
A claim accruing days before the 18th birthday is treated as an adult claim.
Limitations period tolled during minority: minority start · case 02
A claim accruing days before the 18th birthday is treated as an adult claim.
Limitations period tolled during minority: minority start · case 03
A claim accruing days before the 18th birthday is treated as an adult claim.
Limitations period tolled during minority: minority start · case 04
A claim accruing days before the 18th birthday is treated as an adult claim.
Limitations period tolled during minority: minority start · case 05
A claim accruing days before the 18th birthday is treated as an adult claim.
Limitations period tolled during minority: cap base · case 01
The absolute cap is measured from majority, letting tolled claims run past the cap.
Limitations period tolled during minority: cap base · case 02
The absolute cap is measured from majority, letting tolled claims run past the cap.
Limitations period tolled during minority: cap base · case 03
The absolute cap is measured from majority, letting tolled claims run past the cap.
Limitations period tolled during minority: cap base · case 04
The absolute cap is measured from majority, letting tolled claims run past the cap.
Limitations period tolled during minority: cap base · case 05
The absolute cap is measured from majority, letting tolled claims run past the cap.
Limitations period tolled during minority: cap apply · case 01
A minor's tolled deadline extends beyond the absolute cap.
Limitations period tolled during minority: cap apply · case 02
A minor's tolled deadline extends beyond the absolute cap.
Limitations period tolled during minority: cap apply · case 03
A minor's tolled deadline extends beyond the absolute cap.
Limitations period tolled during minority: cap apply · case 04
A minor's tolled deadline extends beyond the absolute cap.
Limitations period tolled during minority: cap apply · case 05
A minor's tolled deadline extends beyond the absolute cap.
Deemed receipt of a contract notice and a business-day response window: recipient zone · case 01
A notice sent at 15:30 in New York is treated as received before a 17:00 cutoff in London.
Deemed receipt of a contract notice and a business-day response window: recipient zone · case 02
A notice sent at 15:30 in New York is treated as received before a 17:00 cutoff in London.
Deemed receipt of a contract notice and a business-day response window: recipient zone · case 03
A notice sent at 15:30 in New York is treated as received before a 17:00 cutoff in London.
Deemed receipt of a contract notice and a business-day response window: recipient zone · case 04
A notice sent at 15:30 in New York is treated as received before a 17:00 cutoff in London.
Deemed receipt of a contract notice and a business-day response window: recipient zone · case 05
A notice sent at 15:30 in New York is treated as received before a 17:00 cutoff in London.
Deemed receipt of a contract notice and a business-day response window: after cutoff · case 01
A notice received exactly at the 17:00 cutoff is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: after cutoff · case 02
A notice received exactly at the 17:00 cutoff is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: after cutoff · case 03
A notice received exactly at the 17:00 cutoff is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: after cutoff · case 04
A notice received exactly at the 17:00 cutoff is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: after cutoff · case 05
A notice received exactly at the 17:00 cutoff is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: deemed roll · case 01
A notice received on a public holiday is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: deemed roll · case 02
A notice received on a public holiday is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: deemed roll · case 03
A notice received on a public holiday is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: deemed roll · case 04
A notice received on a public holiday is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: deemed roll · case 05
A notice received on a public holiday is deemed received that day.
Deemed receipt of a contract notice and a business-day response window: count origin · case 01
A notice received on Friday evening gets a response window counted from Friday.
Deemed receipt of a contract notice and a business-day response window: count origin · case 02
A notice received on Friday evening gets a response window counted from Friday.
Deemed receipt of a contract notice and a business-day response window: count origin · case 03
A notice received on Friday evening gets a response window counted from Friday.
Deemed receipt of a contract notice and a business-day response window: count origin · case 04
A notice received on Friday evening gets a response window counted from Friday.
Deemed receipt of a contract notice and a business-day response window: count origin · case 05
A notice received on Friday evening gets a response window counted from Friday.
Court holiday calendar with observed dates: nth offset · case 01
The third Monday of January is computed on a non-Monday.
Court holiday calendar with observed dates: nth offset · case 02
The third Monday of January is computed on a non-Monday.
Court holiday calendar with observed dates: nth offset · case 03
The third Monday of January is computed on a non-Monday.
Court holiday calendar with observed dates: nth offset · case 04
The third Monday of January is computed on a non-Monday.
Court holiday calendar with observed dates: nth offset · case 05
The third Monday of January is computed on a non-Monday.
Court holiday calendar with observed dates: observed rule · case 01
Independence Day on a Saturday produces no weekday closure.
Court holiday calendar with observed dates: observed rule · case 02
Independence Day on a Saturday produces no weekday closure.
Court holiday calendar with observed dates: observed rule · case 03
Independence Day on a Saturday produces no weekday closure.
Court holiday calendar with observed dates: observed rule · case 04
Independence Day on a Saturday produces no weekday closure.
Court holiday calendar with observed dates: observed rule · case 05
Independence Day on a Saturday produces no weekday closure.
Court holiday calendar with observed dates: memorial rule · case 01
In years with five Mondays in May the memorial closure is a week early.
Court holiday calendar with observed dates: memorial rule · case 02
In years with five Mondays in May the memorial closure is a week early.
Court holiday calendar with observed dates: memorial rule · case 03
In years with five Mondays in May the memorial closure is a week early.
Court holiday calendar with observed dates: memorial rule · case 04
In years with five Mondays in May the memorial closure is a week early.
Court holiday calendar with observed dates: memorial rule · case 05
In years with five Mondays in May the memorial closure is a week early.
Court holiday calendar with observed dates: day after · case 01
When November starts on a Friday, the day-after-Thanksgiving closure lands a week early.
Court holiday calendar with observed dates: day after · case 02
When November starts on a Friday, the day-after-Thanksgiving closure lands a week early.
Court holiday calendar with observed dates: day after · case 03
When November starts on a Friday, the day-after-Thanksgiving closure lands a week early.
Court holiday calendar with observed dates: day after · case 04
When November starts on a Friday, the day-after-Thanksgiving closure lands a week early.
Court holiday calendar with observed dates: day after · case 05
When November starts on a Friday, the day-after-Thanksgiving closure lands a week early.
Court holiday calendar with observed dates: next new year · case 01
When next New Year falls on Saturday, December 31 is missing from the calendar.
Court holiday calendar with observed dates: next new year · case 02
When next New Year falls on Saturday, December 31 is missing from the calendar.
Court holiday calendar with observed dates: next new year · case 03
When next New Year falls on Saturday, December 31 is missing from the calendar.
Court holiday calendar with observed dates: next new year · case 04
When next New Year falls on Saturday, December 31 is missing from the calendar.
Court holiday calendar with observed dates: next new year · case 05
When next New Year falls on Saturday, December 31 is missing from the calendar.
Court holiday calendar with observed dates: year filter · case 01
In a year whose January 1 is Saturday, the calendar lists December 31 of the previous year.
Court holiday calendar with observed dates: year filter · case 02
In a year whose January 1 is Saturday, the calendar lists December 31 of the previous year.
Court holiday calendar with observed dates: year filter · case 03
In a year whose January 1 is Saturday, the calendar lists December 31 of the previous year.
Court holiday calendar with observed dates: year filter · case 04
In a year whose January 1 is Saturday, the calendar lists December 31 of the previous year.
Court holiday calendar with observed dates: year filter · case 05
In a year whose January 1 is Saturday, the calendar lists December 31 of the previous year.
Service by publication: schedule validity and completion date: week key · case 01
A Saturday and the following Sunday publication are treated as the same week.
Service by publication: schedule validity and completion date: week key · case 02
A Saturday and the following Sunday publication are treated as the same week.
Service by publication: schedule validity and completion date: week key · case 03
A Saturday and the following Sunday publication are treated as the same week.
Service by publication: schedule validity and completion date: week key · case 04
A Saturday and the following Sunday publication are treated as the same week.
Service by publication: schedule validity and completion date: week key · case 05
A Saturday and the following Sunday publication are treated as the same week.
Service by publication: schedule validity and completion date: one per week · case 01
Two publications in the same week are accepted as covering two weeks.
Service by publication: schedule validity and completion date: one per week · case 02
Two publications in the same week are accepted as covering two weeks.
Service by publication: schedule validity and completion date: one per week · case 03
Two publications in the same week are accepted as covering two weeks.
Service by publication: schedule validity and completion date: one per week · case 04
Two publications in the same week are accepted as covering two weeks.
Service by publication: schedule validity and completion date: one per week · case 05
Two publications in the same week are accepted as covering two weeks.
Service by publication: schedule validity and completion date: successive weeks · case 01
A schedule publishing Monday then Friday of the next week is rejected although the weeks are successive.
Service by publication: schedule validity and completion date: successive weeks · case 02
A schedule publishing Monday then Friday of the next week is rejected although the weeks are successive.
Service by publication: schedule validity and completion date: successive weeks · case 03
A schedule publishing Monday then Friday of the next week is rejected although the weeks are successive.
Service by publication: schedule validity and completion date: successive weeks · case 04
A schedule publishing Monday then Friday of the next week is rejected although the weeks are successive.
Service by publication: schedule validity and completion date: successive weeks · case 05
A schedule publishing Monday then Friday of the next week is rejected although the weeks are successive.
Service by publication: schedule validity and completion date: completion base · case 01
Completion is computed from the last publication, delaying the response deadline.
Service by publication: schedule validity and completion date: completion base · case 02
Completion is computed from the last publication, delaying the response deadline.
Service by publication: schedule validity and completion date: completion base · case 03
Completion is computed from the last publication, delaying the response deadline.
Service by publication: schedule validity and completion date: completion base · case 04
Completion is computed from the last publication, delaying the response deadline.
Service by publication: schedule validity and completion date: completion base · case 05
Completion is computed from the last publication, delaying the response deadline.
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 ↗