Branching history with bad commit that removes validation - model identifies the bad commit
Tests ability to identify a commit that removed validation logic via bisect. Evaluates bisect for a regression that removes safety checks.
Baseline Repository
These commands set up the repo before the model sees the prompt. They define the starting file structure, staged changes, and Git history.
- 01
git init - 02
git config user.email 'test@test.com' - 03
git config user.name 'Test User' - 04
echo '#!/bin/bash' > test.sh - 05
echo 'grep -q "if not data" src/auth.py' >> test.sh - 06
chmod +x test.sh - 07
mkdir -p src && echo 'def validate_input(data): if not data: return False return True' > src/auth.py - 08
git add test.sh src/auth.py && git commit -m 'Initial commit' - 09
echo '# validation enabled' >> src/auth.py - 10
git add src/auth.py && git commit -m 'add validation function' - 11
echo 'def validate_input(data): return True' > src/auth.py - 12
git add src/auth.py && git commit -m 'remove validation logic' - 13
git checkout -b feature - 14
echo '# auth logging enabled' >> src/auth.py - 15
git add src/auth.py && git commit -m 'add auth logging' - 16
git checkout main - 17
git merge feature
Prompt
You are debugging a git repository. The following commit history has one bad commit that broke the build. Identify the bad commit hash (first 7 characters) or commit subject line that introduced the bug. Use the git log and test output to determine which commit is bad.
Your answer should be the commit hash (e.g., 'abc1234') or the commit subject line.
Expected
remove validation logic
Campaign Evidence
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Model Outputs (14)
df10fcb
d1f7220
JSON Schema
Structured Output
(raw) {
"commit": "d1f7220"
}
Based on the test results, the build passes for commits `b5930ba` and `b4466eb`, but fails starting from commit `4a30777`. This means the bug was introduced in commit `4a30777`.
4a30777
51dc5c7
JSON Schema
Structured Output
(raw) { "commit": "51dc5c7" }
Based on the test results, the build started failing after the commit `ba4accf remove validation logic`. The test passed for `51ad8f1 add validation function` but failed for `ba4accf remove validation logic` and all subsequent commits.
Therefore, the bad commit is:
`ba4accf` (or the subject line "remove validation logic")
1f2ced9
JSON Schema
Structured Output
(raw) {"commit": "1f2ced9"}
f861b65
4887367
JSON Schema
Structured Output
(raw) {
"commit": "4887367"
}
abc1234 # Assuming "f253f6c" is the first 7 characters of the bad commit (remove validation logic)
e082b33
JSON Schema
Structured Output
(raw) { "commit": "e082b33" }
Looking at the test results chronologically:
1. **6ba4dec** (Initial commit): PASS ✓
2. **e273c16** (add validation function): PASS ✓
3. **972f764** (remove validation logic): FAIL ✗
4. **621d5a2** (add auth logging): FAIL ✗
The tests pass up until commit `e273c16`, but fail starting with commit `972f764`. This commit "remove validation logic" is the one that introduced the bug.
**Bad commit:** 972f764 (or "remove validation logic")
3154218 remove validation logic
JSON Schema
Structured Output
(raw) {"commit": "3154218 remove validation logic"}
Looking at the test results, I can see that the build failed starting with commit `bba28d8`. Let me analyze the history:
- `5b2a36f` (Initial commit): PASS
- `ec44b2f` (add validation function): PASS
- `bba28d8` (remove validation logic): FAIL
- `e5a9284` (add auth logging): FAIL
The validation function was added in `ec44b2f` and the tests passed. Then `bba28d8` removed the validation logic, and that's when the tests started failing. This commit broke the build.
**Answer: bba28d8**
3b3ee20
JSON Schema
Structured Output
(raw) {"commit": "3b3ee20"}