FA-10041 / Packaging / Open access
Editable installation mapping: Conflicting editable modules silently override · case 01
Conflicting editable modules silently override.
ROOT CAUSE
The implementation substitutes False for module in result and result[module] != directory, so conflicting editable modules silently override.
VERIFIED REPAIR
Reject different directories for the same module while allowing identical repeats.
Unsuccessful approach: The attempted repair substitutes module in result. Fixture 6 still yields 'conflict' instead of [('a', 'src/a')].
Case contract
Resolve declared modules to their source directories, reject missing sources, reject duplicate module names pointing elsewhere, exclude disabled declarations, and keep module names sorted. Identical repeats are allowed.
Why this case matters
An offline model of editable installation mapping, suitable for testing build and release tooling without external services.
1 / The failure
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(declarations, available):
result = {}
for module, directory, enabled in declarations:
if not enabled: continue
if directory not in available: return 'missing-source'
if False: return 'conflict'
result[module] = directory
return sorted(result.items())
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve([], []), [])
check('fixture 2', solve([('a', 'src/a', True)], ['src/a']), [('a', 'src/a')])
check('fixture 3', solve([('a', 'src/a', False)], []), [])
check('fixture 4', solve([('a', 'src/a', True)], []), 'missing-source')
check('fixture 5', solve([('a', 'src/a', True), ('a', 'lib/a', True)], ['src/a', 'lib/a']), 'conflict')
check('fixture 6', solve([('a', 'src/a', True), ('a', 'src/a', True)], ['src/a']), [('a', 'src/a')])
check('fixture 7', solve([('z', 'src/z', True), ('a', 'src/a', True)], ['src/a', 'src/z']), [('a', 'src/a'), ('z', 'src/z')])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| fixture 1 | [] | [] | Passed |
| fixture 2 | [['a', 'src/a']] | [['a', 'src/a']] | Passed |
| fixture 3 | [] | [] | Passed |
| fixture 4 | missing-source | missing-source | Passed |
| fixture 5 | [['a', 'lib/a']] | conflict | Failed |
| fixture 6 | [['a', 'src/a']] | [['a', 'src/a']] | Passed |
| fixture 7 | [['a', 'src/a'], ['z', 'src/z']] | [['a', 'src/a'], ['z', 'src/z']] | Passed |
SHA-256 / 0494b9499274782f688b27ca418c23eb1b52d650db77bf23d6bf4455d2690571
2 / The unsuccessful fix
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(declarations, available):
result = {}
for module, directory, enabled in declarations:
if not enabled: continue
if directory not in available: return 'missing-source'
if module in result: return 'conflict'
result[module] = directory
return sorted(result.items())
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve([], []), [])
check('fixture 2', solve([('a', 'src/a', True)], ['src/a']), [('a', 'src/a')])
check('fixture 3', solve([('a', 'src/a', False)], []), [])
check('fixture 4', solve([('a', 'src/a', True)], []), 'missing-source')
check('fixture 5', solve([('a', 'src/a', True), ('a', 'lib/a', True)], ['src/a', 'lib/a']), 'conflict')
check('fixture 6', solve([('a', 'src/a', True), ('a', 'src/a', True)], ['src/a']), [('a', 'src/a')])
check('fixture 7', solve([('z', 'src/z', True), ('a', 'src/a', True)], ['src/a', 'src/z']), [('a', 'src/a'), ('z', 'src/z')])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| fixture 1 | [] | [] | Passed |
| fixture 2 | [['a', 'src/a']] | [['a', 'src/a']] | Passed |
| fixture 3 | [] | [] | Passed |
| fixture 4 | missing-source | missing-source | Passed |
| fixture 5 | conflict | conflict | Passed |
| fixture 6 | conflict | [['a', 'src/a']] | Failed |
| fixture 7 | [['a', 'src/a'], ['z', 'src/z']] | [['a', 'src/a'], ['z', 'src/z']] | Passed |
SHA-256 / 4ee3078c74ee7b692ad25b648b50524dbfbe2234f9c424703d157c6db4606240
3 / The verified repair
Exit 0"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(declarations, available):
result = {}
for module, directory, enabled in declarations:
if not enabled: continue
if directory not in available: return 'missing-source'
if module in result and result[module] != directory: return 'conflict'
result[module] = directory
return sorted(result.items())
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve([], []), [])
check('fixture 2', solve([('a', 'src/a', True)], ['src/a']), [('a', 'src/a')])
check('fixture 3', solve([('a', 'src/a', False)], []), [])
check('fixture 4', solve([('a', 'src/a', True)], []), 'missing-source')
check('fixture 5', solve([('a', 'src/a', True), ('a', 'lib/a', True)], ['src/a', 'lib/a']), 'conflict')
check('fixture 6', solve([('a', 'src/a', True), ('a', 'src/a', True)], ['src/a']), [('a', 'src/a')])
check('fixture 7', solve([('z', 'src/z', True), ('a', 'src/a', True)], ['src/a', 'src/z']), [('a', 'src/a'), ('z', 'src/z')])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| fixture 1 | [] | [] | Passed |
| fixture 2 | [['a', 'src/a']] | [['a', 'src/a']] | Passed |
| fixture 3 | [] | [] | Passed |
| fixture 4 | missing-source | missing-source | Passed |
| fixture 5 | conflict | conflict | Passed |
| fixture 6 | [['a', 'src/a']] | [['a', 'src/a']] | Passed |
| fixture 7 | [['a', 'src/a'], ['z', 'src/z']] | [['a', 'src/a'], ['z', 'src/z']] | Passed |
SHA-256 / 55a2bd8e53b742cf8ec0aa1912ceda9be623f41c54473bced84ba9d67c9b5326
Verification & scope
This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.
Observations recorded using Python 3.12.14 at 2026-09-29T14:38:35.382887+00:00.
Case digest / ad6184c55a77ef74c71c3c5b580bfac7a6dd8a9fbd96b89c494b14985c7f7d59