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Umbra has no testing implementation in the main SQLancer repository. SQLancer is credited with 55 bugs in it, reported between 2023-05-12 and 2025-11-07.

How the bugs break down

By year reported

2023
18
2024
28
2025
9

Who found them

Found by the SQLancer project
55

By status

Fixed
55

By symptom

Unclassified
55

By technique

Technique not recorded
55

Why each bug counts

Listed in the project's own bug repository
55

Who reported them (2)

Suyang Zhong
46
Zhaokun Xiang
9

Every bug on record (55)

One row per report, newest first, each linking to the report itself. Rejected reports are marked and are not part of any count above.

Reported Report Status Technique Reporter
2025-11-07 An unexpected internal error in a left join fixed — Zhaokun Xiang
2025-10-07 An unexpected internal error in an equivalent join fixed — Zhaokun Xiang
2025-09-07 An unexpected internal error in joins fixed — Zhaokun Xiang
2025-09-07 An unexpected anti-join logic bug fixed — Zhaokun Xiang
2025-08-07 An unexpected core dumped in multiple joins fixed — Zhaokun Xiang
2025-07-23 An unexpected core dump in multiple joins fixed — Zhaokun Xiang
2025-07-16 An unexpected internal error fixed — Zhaokun Xiang
2025-07-07 An unexpected core dumped in index creation fixed — Zhaokun Xiang
2025-06-30 Unexpected lateral join Result fixed — Zhaokun Xiang
2024-12-01 Unexpected Abort fixed — Suyang Zhong
2024-12-01 Assertion failure when using UNION ALL fixed — Suyang Zhong
2024-11-01 Unexpected Results when Using LEFT JOIN with VIEW on IS NOT NULL fixed — Suyang Zhong
2024-10-01 Unexpected Results when Using Multiple Comparison fixed — Suyang Zhong
2024-10-01 Segmentation fault when Using NATURAL FULL JOIN fixed — Suyang Zhong
2024-08-02 Unexpected results when using logical operator in VIEW fixed — Suyang Zhong
2024-08-01 Unexpected Results when Using IN and BETWEEN AND for VIEW fixed — Suyang Zhong
2024-08-01 FATAL ERROR when Using NATURAL FULL JOIN fixed — Suyang Zhong
2024-07-01 Unexpected Results when Using IN and BETWEEN AND for VIEW fixed — Suyang Zhong
2024-07-01 Unexpected Results when Using CAST fixed — Suyang Zhong
2024-06-02 Unexpected result when using NULLIF and CAST in VIEW fixed — Suyang Zhong
2024-06-02 Unexpected result when using LEFT JOIN and NULL values fixed — Suyang Zhong
2024-06-01 Unexpected Results when Using NOT IN expression fixed — Suyang Zhong
2024-06-01 Unexpected Results when Using IS NULL with empty VIEW fixed — Suyang Zhong
2024-04-02 Unexpected result when using LEFT JOIN and VIEW fixed — Suyang Zhong
2024-04-02 Crash when using INNER JOIN fixed — Suyang Zhong
2024-04-01 Unexpected results when Using IN expression With INDEX fixed — Suyang Zhong
2024-04-01 Unexpected results when Using BETWEEN With VIEW fixed — Suyang Zhong
2024-01-18 ERROR: AddressSanitizer: use-after-poison fixed — Suyang Zhong
2024-01-18 Assertion failure when using COALESCE and CASE WHEN fixed — Suyang Zhong
2024-01-16 Crash when using BETWEEN operator and large integer fixed — Suyang Zhong
2024-01-15 Unexpected results when using NATURAL RIGHT JOIN with INDEX fixed — Suyang Zhong
2024-01-15 ERROR: AddressSanitizer: stack-buffer-overflow fixed — Suyang Zhong
2024-01-15 Assertion failure when using COT and BETWEEN AND fixed — Suyang Zhong
2024-01-14 Unexpected results when Casting to VARCHAR fixed — Suyang Zhong
2024-01-13 Unexpected results when Using COS and IN expression fixed — Suyang Zhong
2024-01-13 Assertion failure when using NATURAL JOIN fixed — Suyang Zhong
2024-01-01 Segmentation fault when Using NATURAL FULL JOIN fixed — Suyang Zhong
2023-12-23 Unexpected results when Using UNION ALL for JOIN fixed — Suyang Zhong
2023-12-23 Unexpected results when Mod negative number with View fixed — Suyang Zhong
2023-12-19 Unexpected results when LEFT JOIN a view fixed — Suyang Zhong
2023-12-16 Unexpected results when Using BETWEEN Operator and Comparison fixed — Suyang Zhong
2023-12-14 Segmentation fault when Using Between Operator and integer fixed — Suyang Zhong
2023-12-12 Unexpected Results When Using Between Operator and String Concatenation fixed — Suyang Zhong
2023-11-29 Potential Issue when Dropping table fixed — Suyang Zhong
2023-11-29 Potential Issue in NULLIF function fixed — Suyang Zhong
2023-11-29 Potential Issue about boolean pruning in filter fixed — Suyang Zhong
2023-11-29 Potential Issue about UNIQUE INDEX fixed — Suyang Zhong
2023-11-28 Potential Issue in BETWEEN operator fixed — Suyang Zhong
2023-11-27 Unexpected Results when Comparing Boolean Values fixed — Suyang Zhong
2023-09-12 Segmentation fault when Using Between Operator fixed — Suyang Zhong
2023-09-12 Potential Issue when Using CONCAT with overflow integers fixed — Suyang Zhong
2023-06-12 Unexpected results after triggering an index scan fixed — Suyang Zhong
2023-05-12 Segmentation fault when Using NATURAL LEFT JOIN fixed — Suyang Zhong
2023-05-12 Potential issue when Using Boolean values and BETWEEN Operator fixed — Suyang Zhong
2023-05-12 Potential issue handling Boolean values after INDEX fixed — Suyang Zhong

Every figure on this page is computed from _data/impact/. The attribution policy explains what has to be true for a bug to be counted.