[ty] Remove py-fuzzer skips for seeds that are no longer slow (#19906)

.github/workflows/ci.yaml

@@ -38,7 +38,8 @@ jobs:
       fuzz: ${{ steps.check_fuzzer.outputs.changed }}
       # Flag that is set to "true" when code related to ty changes.
       ty: ${{ steps.check_ty.outputs.changed }}
-
+      # Flag that is set to "true" when code related to the py-fuzzer folder changes.
+      py-fuzzer: ${{ steps.check_py_fuzzer.outputs.changed }}
       # Flag that is set to "true" when code related to the playground changes.
       playground: ${{ steps.check_playground.outputs.changed }}
     steps:
@@ -68,7 +69,6 @@ jobs:
             ':crates/ruff_text_size/**' \
             ':crates/ruff_python_ast/**' \
             ':crates/ruff_python_parser/**' \
-            ':python/py-fuzzer/**' \
             ':.github/workflows/ci.yaml' \
           ; then
               echo "changed=false" >> "$GITHUB_OUTPUT"
@@ -138,6 +138,18 @@ jobs:
               echo "changed=true" >> "$GITHUB_OUTPUT"
           fi
 
+      - name: Check if the py-fuzzer code changed
+        id: check_py_fuzzer
+        env:
+          MERGE_BASE: ${{ steps.merge_base.outputs.sha }}
+        run: |
+          if git diff --quiet "${MERGE_BASE}...HEAD" -- 'python/py_fuzzer/**' \
+          ; then
+              echo "changed=false" >> "$GITHUB_OUTPUT"
+          else
+              echo "changed=true" >> "$GITHUB_OUTPUT"
+          fi
+
       - name: Check if there was any code related change
         id: check_code
         env:
@@ -443,7 +455,7 @@ jobs:
     needs:
       - cargo-test-linux
       - determine_changes
-    if: ${{ !contains(github.event.pull_request.labels.*.name, 'no-test') && needs.determine_changes.outputs.parser == 'true' }}
+    if: ${{ !contains(github.event.pull_request.labels.*.name, 'no-test') && (needs.determine_changes.outputs.parser == 'true' || needs.determine_changes.outputs.py-fuzzer == 'true') }}
     timeout-minutes: 20
     env:
       FORCE_COLOR: 1
@@ -633,7 +645,7 @@ jobs:
       - cargo-test-linux
       - determine_changes
     # Only runs on pull requests, since that is the only we way we can find the base version for comparison.
-    if: ${{ !contains(github.event.pull_request.labels.*.name, 'no-test') && github.event_name == 'pull_request' && needs.determine_changes.outputs.ty == 'true' }}
+    if: ${{ !contains(github.event.pull_request.labels.*.name, 'no-test') && github.event_name == 'pull_request' && (needs.determine_changes.outputs.ty == 'true' || needs.determine_changes.outputs.py-fuzzer == 'true') }}
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

python/py-fuzzer/fuzz.py

@@ -152,16 +152,13 @@ class FuzzResult:
 
 def fuzz_code(seed: Seed, args: ResolvedCliArgs) -> FuzzResult:
     """Return a `FuzzResult` instance describing the fuzzing result from this seed."""
-    # TODO(carljm) remove once we debug the slowness of these seeds
-    skip_check = seed in {120, 160, 314, 335}
-
     code = generate_random_code(seed)
     bug_found = False
     minimizer_callback: Callable[[str], bool] | None = None
 
     if args.baseline_executable_path is None:
         only_new_bugs = False
-        if not skip_check and contains_bug(
+        if contains_bug(
             code, executable=args.executable, executable_path=args.test_executable_path
         ):
             bug_found = True
@@ -172,7 +169,7 @@ def fuzz_code(seed: Seed, args: ResolvedCliArgs) -> FuzzResult:
             )
     else:
         only_new_bugs = True
-        if not skip_check and contains_new_bug(
+        if contains_new_bug(
             code,
             executable=args.executable,
             test_executable_path=args.test_executable_path,