FA-29316 / HTTP redirects / Open access
Report redirect failures with the failing phase and completed request context: failure from code · case 01
Report redirect failures with the failing phase and completed request context: the failure from code branch emits an incorrect decision.
ROOT CAUSE
The failure-from-code decision uses 'rejected'; this violates the stipulated controller policy.
VERIFIED REPAIR
At this decision use 'code is not None', preserving the other controller outputs.
Unsuccessful approach: The partial repair uses "phase != 'policy'" and still fails an explicit boundary or control.
Case contract
Report redirect failures with the failing phase and completed request context. The explicit fixture inputs and outputs define a bounded offline policy; request identity must accompany the decision.
Why this case matters
Models a redirect controller decision before following a target or exposing a redirect result.
1 / The failure
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
from urllib.parse import urlsplit, unquote, quote
import posixpath
import re
N = 1
observations = []
def solve(request, phase, code, completed, attempted, rejected, original):
return {'request': request, 'decision': [phase, original, attempted, completed, code if code is not None else 'none', rejected, completed[-1] if completed else None, phase in ('parse','policy'), completed, rejected or phase == 'parse']}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve('/requests/' + str(N) + '/0', 'parse', 'invalid-target', ['/a'], 'bad%', True, '/a'), {'request': '/requests/' + str(N) + '/0', 'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True]})
check('fixture 2', solve('/requests/' + str(N) + '/1', 'policy', 'blocked', ['/a', '/b'], '/c', True, '/a'), {'request': '/requests/' + str(N) + '/1', 'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', True, '/b', True, ['/a', '/b'], True]})
check('fixture 3', solve('/requests/' + str(N) + '/2', 'dispatch', 'closed', ['/a'], '/b', False, '/a'), {'request': '/requests/' + str(N) + '/2', 'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', True, '/a', False, ['/a'], False]})
check('fixture 4', solve('/requests/' + str(N) + '/3', 'response', 'body-error', [], '/x', False, '/x'), {'request': '/requests/' + str(N) + '/3', 'decision': ['response', '/x', '/x', [], 'body-error', True, None, False, [], False]})
check('fixture 5', solve('/requests/' + str(N) + '/4', 'complete', None, ['/a', '/b'], '/b', False, '/a'), {'request': '/requests/' + str(N) + '/4', 'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', False, '/b', False, ['/a', '/b'], False]})
check('fixture 6', solve('/requests/' + str(N) + '/5', 'policy', 'blocked', [], '/x', True, '/x'), {'request': '/requests/' + str(N) + '/5', 'decision': ['policy', '/x', '/x', [], 'blocked', True, None, True, [], True]})
check('fixture 7', solve('/requests/' + str(N) + '/6', 'parse', 'invalid-target', ['/z', '/a'], 'bad%', False, '/z'), {'request': '/requests/' + str(N) + '/6', 'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', True, '/a', True, ['/z', '/a'], True]})
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 | {'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True], 'request': '/requests/1/0'} | {'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True], 'request': '/requests/1/0'} | Passed |
| fixture 2 | {'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', True, '/b', True, ['/a', '/b'], True], 'request': '/requests/1/1'} | {'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', True, '/b', True, ['/a', '/b'], True], 'request': '/requests/1/1'} | Passed |
| fixture 3 | {'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', False, '/a', False, ['/a'], False], 'request': '/requests/1/2'} | {'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', True, '/a', False, ['/a'], False], 'request': '/requests/1/2'} | Failed |
| fixture 4 | {'decision': ['response', '/x', '/x', [], 'body-error', False, None, False, [], False], 'request': '/requests/1/3'} | {'decision': ['response', '/x', '/x', [], 'body-error', True, None, False, [], False], 'request': '/requests/1/3'} | Failed |
| fixture 5 | {'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', False, '/b', False, ['/a', '/b'], False], 'request': '/requests/1/4'} | {'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', False, '/b', False, ['/a', '/b'], False], 'request': '/requests/1/4'} | Passed |
| fixture 6 | {'decision': ['policy', '/x', '/x', [], 'blocked', True, None, True, [], True], 'request': '/requests/1/5'} | {'decision': ['policy', '/x', '/x', [], 'blocked', True, None, True, [], True], 'request': '/requests/1/5'} | Passed |
| fixture 7 | {'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', False, '/a', True, ['/z', '/a'], True], 'request': '/requests/1/6'} | {'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', True, '/a', True, ['/z', '/a'], True], 'request': '/requests/1/6'} | Failed |
SHA-256 / a3863662939a9da5b220be2db6cde8985361a6c23aa8e452dd23e6e3a7a57e31
2 / The unsuccessful fix
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
from urllib.parse import urlsplit, unquote, quote
import posixpath
import re
N = 1
observations = []
def solve(request, phase, code, completed, attempted, rejected, original):
return {'request': request, 'decision': [phase, original, attempted, completed, code if code is not None else 'none', phase != 'policy', completed[-1] if completed else None, phase in ('parse','policy'), completed, rejected or phase == 'parse']}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve('/requests/' + str(N) + '/0', 'parse', 'invalid-target', ['/a'], 'bad%', True, '/a'), {'request': '/requests/' + str(N) + '/0', 'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True]})
check('fixture 2', solve('/requests/' + str(N) + '/1', 'policy', 'blocked', ['/a', '/b'], '/c', True, '/a'), {'request': '/requests/' + str(N) + '/1', 'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', True, '/b', True, ['/a', '/b'], True]})
check('fixture 3', solve('/requests/' + str(N) + '/2', 'dispatch', 'closed', ['/a'], '/b', False, '/a'), {'request': '/requests/' + str(N) + '/2', 'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', True, '/a', False, ['/a'], False]})
check('fixture 4', solve('/requests/' + str(N) + '/3', 'response', 'body-error', [], '/x', False, '/x'), {'request': '/requests/' + str(N) + '/3', 'decision': ['response', '/x', '/x', [], 'body-error', True, None, False, [], False]})
check('fixture 5', solve('/requests/' + str(N) + '/4', 'complete', None, ['/a', '/b'], '/b', False, '/a'), {'request': '/requests/' + str(N) + '/4', 'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', False, '/b', False, ['/a', '/b'], False]})
check('fixture 6', solve('/requests/' + str(N) + '/5', 'policy', 'blocked', [], '/x', True, '/x'), {'request': '/requests/' + str(N) + '/5', 'decision': ['policy', '/x', '/x', [], 'blocked', True, None, True, [], True]})
check('fixture 7', solve('/requests/' + str(N) + '/6', 'parse', 'invalid-target', ['/z', '/a'], 'bad%', False, '/z'), {'request': '/requests/' + str(N) + '/6', 'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', True, '/a', True, ['/z', '/a'], True]})
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 | {'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True], 'request': '/requests/1/0'} | {'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True], 'request': '/requests/1/0'} | Passed |
| fixture 2 | {'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', False, '/b', True, ['/a', '/b'], True], 'request': '/requests/1/1'} | {'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', True, '/b', True, ['/a', '/b'], True], 'request': '/requests/1/1'} | Failed |
| fixture 3 | {'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', True, '/a', False, ['/a'], False], 'request': '/requests/1/2'} | {'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', True, '/a', False, ['/a'], False], 'request': '/requests/1/2'} | Passed |
| fixture 4 | {'decision': ['response', '/x', '/x', [], 'body-error', True, None, False, [], False], 'request': '/requests/1/3'} | {'decision': ['response', '/x', '/x', [], 'body-error', True, None, False, [], False], 'request': '/requests/1/3'} | Passed |
| fixture 5 | {'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', True, '/b', False, ['/a', '/b'], False], 'request': '/requests/1/4'} | {'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', False, '/b', False, ['/a', '/b'], False], 'request': '/requests/1/4'} | Failed |
| fixture 6 | {'decision': ['policy', '/x', '/x', [], 'blocked', False, None, True, [], True], 'request': '/requests/1/5'} | {'decision': ['policy', '/x', '/x', [], 'blocked', True, None, True, [], True], 'request': '/requests/1/5'} | Failed |
| fixture 7 | {'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', True, '/a', True, ['/z', '/a'], True], 'request': '/requests/1/6'} | {'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', True, '/a', True, ['/z', '/a'], True], 'request': '/requests/1/6'} | Passed |
SHA-256 / f83e0dbdd1a69d881a3b1c1de09ace414c36bc73c3586aefc0904cb45f781db3
3 / The verified repair
Exit 0"""Failure Map reference implementation. Python standard library only."""
import json
from urllib.parse import urlsplit, unquote, quote
import posixpath
import re
N = 1
observations = []
def solve(request, phase, code, completed, attempted, rejected, original):
return {'request': request, 'decision': [phase, original, attempted, completed, code if code is not None else 'none', code is not None, completed[-1] if completed else None, phase in ('parse','policy'), completed, rejected or phase == 'parse']}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve('/requests/' + str(N) + '/0', 'parse', 'invalid-target', ['/a'], 'bad%', True, '/a'), {'request': '/requests/' + str(N) + '/0', 'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True]})
check('fixture 2', solve('/requests/' + str(N) + '/1', 'policy', 'blocked', ['/a', '/b'], '/c', True, '/a'), {'request': '/requests/' + str(N) + '/1', 'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', True, '/b', True, ['/a', '/b'], True]})
check('fixture 3', solve('/requests/' + str(N) + '/2', 'dispatch', 'closed', ['/a'], '/b', False, '/a'), {'request': '/requests/' + str(N) + '/2', 'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', True, '/a', False, ['/a'], False]})
check('fixture 4', solve('/requests/' + str(N) + '/3', 'response', 'body-error', [], '/x', False, '/x'), {'request': '/requests/' + str(N) + '/3', 'decision': ['response', '/x', '/x', [], 'body-error', True, None, False, [], False]})
check('fixture 5', solve('/requests/' + str(N) + '/4', 'complete', None, ['/a', '/b'], '/b', False, '/a'), {'request': '/requests/' + str(N) + '/4', 'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', False, '/b', False, ['/a', '/b'], False]})
check('fixture 6', solve('/requests/' + str(N) + '/5', 'policy', 'blocked', [], '/x', True, '/x'), {'request': '/requests/' + str(N) + '/5', 'decision': ['policy', '/x', '/x', [], 'blocked', True, None, True, [], True]})
check('fixture 7', solve('/requests/' + str(N) + '/6', 'parse', 'invalid-target', ['/z', '/a'], 'bad%', False, '/z'), {'request': '/requests/' + str(N) + '/6', 'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', True, '/a', True, ['/z', '/a'], True]})
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 | {'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True], 'request': '/requests/1/0'} | {'decision': ['parse', '/a', 'bad%', ['/a'], 'invalid-target', True, '/a', True, ['/a'], True], 'request': '/requests/1/0'} | Passed |
| fixture 2 | {'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', True, '/b', True, ['/a', '/b'], True], 'request': '/requests/1/1'} | {'decision': ['policy', '/a', '/c', ['/a', '/b'], 'blocked', True, '/b', True, ['/a', '/b'], True], 'request': '/requests/1/1'} | Passed |
| fixture 3 | {'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', True, '/a', False, ['/a'], False], 'request': '/requests/1/2'} | {'decision': ['dispatch', '/a', '/b', ['/a'], 'closed', True, '/a', False, ['/a'], False], 'request': '/requests/1/2'} | Passed |
| fixture 4 | {'decision': ['response', '/x', '/x', [], 'body-error', True, None, False, [], False], 'request': '/requests/1/3'} | {'decision': ['response', '/x', '/x', [], 'body-error', True, None, False, [], False], 'request': '/requests/1/3'} | Passed |
| fixture 5 | {'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', False, '/b', False, ['/a', '/b'], False], 'request': '/requests/1/4'} | {'decision': ['complete', '/a', '/b', ['/a', '/b'], 'none', False, '/b', False, ['/a', '/b'], False], 'request': '/requests/1/4'} | Passed |
| fixture 6 | {'decision': ['policy', '/x', '/x', [], 'blocked', True, None, True, [], True], 'request': '/requests/1/5'} | {'decision': ['policy', '/x', '/x', [], 'blocked', True, None, True, [], True], 'request': '/requests/1/5'} | Passed |
| fixture 7 | {'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', True, '/a', True, ['/z', '/a'], True], 'request': '/requests/1/6'} | {'decision': ['parse', '/z', 'bad%', ['/z', '/a'], 'invalid-target', True, '/a', True, ['/z', '/a'], True], 'request': '/requests/1/6'} | Passed |
SHA-256 / 57c5841b0a92b1cfb17b555fae4303a39a42f0f62f8c1cb839e48c41e6f3e6fc
Verification & scope
Stipulated offline redirect policy, not a complete HTTP, browser, URL, cache, or security implementation. Numbered variants vary request correlation identity. 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 2026-09-29T14:41:42.119010+00:00.
Case digest / 19a9e8977e1c1de2ff2ae0dee1fd97504b49e1f950b5efcc781fbdcd60509aa6