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Task prompt (4775 tokens)PR Repair Task: PR #185Before making changes, read Repair the existing PR branch in place. Do not create a new branch or PR. Context
Required OutcomeFix the currently failing checks shown below. Required Local VerificationThe workflow will rerun these commands before pushing. Your changes should make them pass: Current PR Diff StatCurrent PR Diff Excerptdiff --git a/src/cop/rails/negate_include.rs b/src/cop/rails/negate_include.rs
index a64c1c74d..c49506c47 100644
--- a/src/cop/rails/negate_include.rs
+++ b/src/cop/rails/negate_include.rs
@@ -35,6 +35,20 @@ use crate::parse::source::SourceFile;
/// uses `--force-exclusion` which handles this correctly. The `heroku/`
/// paths aren't under `vendor/` at all and are likely excluded by RuboCop's
/// file discovery or `.gitignore` handling. No cop-level fix needed.
+///
+/// ## Corpus investigation (2026-03-24)
+///
+/// FP=0, FN=4. All 4 FNs are in vendored gem paths:
+/// - `heroku/ruby/1.9.1/gems/rdoc-*/lib/rdoc/method_attr.rb` (cjstewart88__Tubalr, 2 FNs)
+/// - `vendor/bundle/ruby/2.3.0/gems/rdoc-4.3.0/lib/rdoc/method_attr.rb` (liaoziyang__stackneveroverflow, 1 FN)
+/// - `examples/vendored-puppet/vendor/puppet-2.7.8/lib/puppet/util/settings.rb` (pitluga__supply_drop, 1 FN)
+///
+/// Patterns: `!searched.include?(kernel)` inside `&&` and `! %w{...}.include?(group)`
+/// with space after `!`. Both patterns are correctly detected by the cop
+/// (verified via fixture tests). Root cause is the same file-exclusion path
+/// resolution issue as the 2026-03-19 FPs — RuboCop scans these vendored
+/// files via `--force-exclusion`, but nitrocop's corpus path resolution
+/// differs. No cop-level fix needed.
pub struct NegateInclude;
impl Cop for NegateInclude {
diff --git a/tests/fixtures/cops/rails/negate_include/offense.rb b/tests/fixtures/cops/rails/negate_include/offense.rb
index bca0fc382..7ae6b783d 100644
--- a/tests/fixtures/cops/rails/negate_include/offense.rb
+++ b/tests/fixtures/cops/rails/negate_include/offense.rb
@@ -24,3 +24,11 @@
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Rails/NegateInclude: Use `exclude?` instead of `!include?`.
handle_invalid
end
+
+# inside && expression
+parent != kernel && !searched.include?(kernel)
+ ^^^^^^^^^^^^^^^^^^^^^^^^^^ Rails/NegateInclude: Use `exclude?` instead of `!include?`.
+
+# space between ! and expression
+! %w{root wheel}.include?(group)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Rails/NegateInclude: Use `exclude?` instead of `!include?`.Local Corpus ContextThese corpus oracle artifacts are already downloaded locally by the workflow.
Use these files directly with the repo scripts when you need corpus context. python3 scripts/investigate_cop.py Department/CopName --input /home/runner/work/_temp/agent-pr-repair/repair/corpus.json --context
python3 scripts/check_cop.py Department/CopName --input /home/runner/work/_temp/agent-pr-repair/repair/corpus.json --verbose --rerun --quick --cloneFailed Checks Packetcop-check (0)
cop-check (3)
cop-check (1)
cop-check (2)
cop-check-gate
Constraints
Available Local Helper ScriptsThese helper scripts are available in this CI checkout. Prefer the stable top-level CLI paths shown below over ad hoc commands when they directly help with diagnosis or validation.
Typical usage when present: python3 scripts/check_cop.py Department/CopName --verbose --rerun --quick --clone
python3 scripts/dispatch_cops.py changed --base origin/main --head HEAD
python3 scripts/investigate_cop.py Department/CopName --context
python3 scripts/verify_cop_locations.py Department/CopName
python3 scripts/corpus_smoke_test.py --binary target/release/nitrocop |
Auto-repair Agent Failed
The repair agent step failed before local verification ran. |
Automated fix fix for
Rails/NegateIncludecorpus conformance.Refs #166
Details
Rails/NegateIncludeResult
Changes
Agent conversation excerpt
The offense.rb already has test cases added (lines 28-38). Let me first run the tests to see the current state.
The cop IS detecting the patterns (column 20 for
!searched.include?(kernel)), but the fixture annotations are wrong —^at column 0 instead of aligned, and wrong message text. Let me also check if! %w{...}.include?()with the space is detected.The space-separated
! %w{root wheel}.include?(group)is NOT detected. Let me also verify the single-line&&case is detected:The test framework bypasses CLI config. The cop IS detecting the
&&patterns (column 20) but the fixture has wrong annotations. Let me fix the fixture and check if! %w{...}is also detected.Both tests pass. The cop already detects both patterns correctly. The FNs are config/context issues (likely file exclusion path resolution for vendored gem paths), not detection bugs.
Let me update the doc comment and verify the fixture looks correct.
Good. Now let me update the doc comment on the cop struct.
Tests pass. Now let me format and commit.
The 4`
Done. The 4 corpus FNs are not detection bugs — the cop already correctly detects both patterns:
!searched.include?(kernel)inside&&expressions (FN Update tiers.json from corpus oracle #1-3)! %w{root wheel}.include?(group)with space after!(FN Update tiers.json from corpus oracle #4)The FNs come from the same file-exclusion path resolution issue documented in the 2026-03-19 investigation: RuboCop's
--force-exclusionhandles vendored gem paths (heroku/ruby/...,vendor/bundle/...) differently than nitrocop's corpus path resolution. All affected files are in vendored gem directories. No cop-level fix is possible — this requires a fix in the corpus path/exclusion handling.Task prompt (4275 tokens)
Fix Rails/NegateInclude — 0 FP, 4 FN
Instructions
You are fixing ONE cop in nitrocop, a Rust Ruby linter that uses Prism for parsing.
Current state: 6,419 matches, 0 false positives, 4 false negatives.
Focus on: FN (RuboCop flags code nitrocop misses).
Workflow
behavior on BOTH the specific FP case AND the general pattern:
tests/fixtures/cops/rails/negate_include/offense.rbwith^annotationtests/fixtures/cops/rails/negate_include/no_offense.rbcargo test --lib -- cop::rails::negate_includesrc/cop/rails/negate_include.rscargo test --lib -- cop::rails::negate_include///doc comment on the cop struct documenting what you found and fixedFixture Format
Mark offenses with
^markers on the line AFTER the offending source line:The
^characters must align with the offending columns. The message format isRails/NegateInclude: <message text>.If your test passes immediately
If you add a test case and it passes without code changes, the corpus mismatch is
caused by config/context differences, not a detection bug.
Do NOT loop trying to make the test fail. Instead:
src/config/or the cop's config handling, not detection logica
///comment on the cop struct and commitCRITICAL: Avoid regressions in the opposite direction
When fixing FPs, your change MUST NOT suppress legitimate detections. When fixing FNs,
your change MUST NOT flag code that RuboCop accepts. A fix that eliminates a few issues
in one direction but introduces hundreds in the other is a catastrophic regression.
Before exempting a category of patterns, verify with RuboCop that the general case
is still an offense:
If RuboCop flags the general pattern but not your specific case, the difference is in
a narrow context (e.g., enclosing structure, receiver type, argument count) — your fix
must target that specific context, not the broad category.
Rule of thumb: if your fix adds an early
returnorcontinuethat skips a wholenode type, operator class, or naming pattern, it's probably too broad. Prefer adding a
condition that matches the SPECIFIC differentiating context.
Rules
src/cop/rails/negate_include.rsandtests/fixtures/cops/rails/negate_include/cargo test --lib -- cop::rails::negate_includeto verify your fix (do NOT run the full test suite)git stashStart Here
Use the existing corpus data to focus on the most concentrated regressions first.
Helpful local commands:
python3 scripts/investigate-cop.py Rails/NegateInclude --repos-onlypython3 scripts/investigate-cop.py Rails/NegateInclude --contextpython3 scripts/verify-cop-locations.py Rails/NegateIncludeTop FN repos:
cjstewart88__Tubalr__f6956c8(2 FN) — exampleheroku/ruby/1.9.1/gems/rdoc-3.8/lib/rdoc/method_attr.rb:157liaoziyang__stackneveroverflow__8f4dce2(1 FN) — examplevendor/bundle/ruby/2.3.0/gems/rdoc-4.3.0/lib/rdoc/method_attr.rb:184pitluga__supply_drop__d64c50c(1 FN) — exampleexamples/vendored-puppet/vendor/puppet-2.7.8/lib/puppet/util/settings.rb:800Representative FN examples:
cjstewart88__Tubalr__f6956c8: heroku/ruby/1.9.1/gems/rdoc-3.8/lib/rdoc/method_attr.rb:157— Use.exclude?and remove the negation part.cjstewart88__Tubalr__f6956c8: heroku/ruby/1.9.1/gems/rdoc-3.9.4/lib/rdoc/method_attr.rb:157— Use.exclude?and remove the negation part.liaoziyang__stackneveroverflow__8f4dce2: vendor/bundle/ruby/2.3.0/gems/rdoc-4.3.0/lib/rdoc/method_attr.rb:184— Use.exclude?and remove the negation part.Pre-diagnostic Results
Diagnosis Summary
Each example was tested by running nitrocop on the extracted source in isolation
with
--force-default-configto determine if the issue is a code bug or config issue.Note: source context is truncated and may not parse perfectly. If a diagnosis
seems wrong (e.g., your test passes immediately for a 'CODE BUG'), treat it as
a config/context issue instead.
FN #1:
cjstewart88__Tubalr__f6956c8: heroku/ruby/1.9.1/gems/rdoc-3.8/lib/rdoc/method_attr.rb:157NOT DETECTED — CODE BUG
The cop fails to detect this pattern. Fix the detection logic.
Enclosing structure: enclosing line:
searched << kernel if kernel &&The offense is inside this structure — the cop may need
to handle this context to detect the pattern.
Message:
Use.exclude?and remove the negation part.Ready-made test snippet (add to offense.rb, adjust
^count):Full source context:
FN #2:
cjstewart88__Tubalr__f6956c8: heroku/ruby/1.9.1/gems/rdoc-3.9.4/lib/rdoc/method_attr.rb:157NOT DETECTED — CODE BUG
The cop fails to detect this pattern. Fix the detection logic.
Enclosing structure: enclosing line:
searched << kernel if kernel &&The offense is inside this structure — the cop may need
to handle this context to detect the pattern.
Message:
Use.exclude?and remove the negation part.Ready-made test snippet (add to offense.rb, adjust
^count):Full source context:
FN #3:
liaoziyang__stackneveroverflow__8f4dce2: vendor/bundle/ruby/2.3.0/gems/rdoc-4.3.0/lib/rdoc/method_attr.rb:184NOT DETECTED — CODE BUG
The cop fails to detect this pattern. Fix the detection logic.
Enclosing structure: enclosing line:
searched << kernel if kernel &&The offense is inside this structure — the cop may need
to handle this context to detect the pattern.
Message:
Use.exclude?and remove the negation part.Ready-made test snippet (add to offense.rb, adjust
^count):Full source context:
FN #4:
pitluga__supply_drop__d64c50c: examples/vendored-puppet/vendor/puppet-2.7.8/lib/puppet/util/settings.rb:800NOT DETECTED — CODE BUG
The cop fails to detect this pattern. Fix the detection logic.
Message:
Use.exclude?and remove the negation part.Ready-made test snippet (add to offense.rb, adjust
^count):Full source context:
Current Rust Implementation
src/cop/rails/negate_include.rsRuboCop Ruby Implementation (ground truth)
vendor/rubocop-rails/lib/rubocop/cop/rails/negate_include.rbRuboCop Test Excerpts
vendor/rubocop-rails/spec/rubocop/cop/rails/negate_include_spec.rbCurrent Fixture: offense.rb
tests/fixtures/cops/rails/negate_include/offense.rbCurrent Fixture: no_offense.rb
tests/fixtures/cops/rails/negate_include/no_offense.rb