{"record":{"id":"acc4bd1c2648846a","repo":"datawhalechina/hello-agents","slug":"delete-file-target-missing-rel-path","errorCode":null,"errorMessage":"Delete File target missing: {rel_path}","messagePattern":"Delete File target missing: (.+?)","errorType":"exception","errorClass":"PatchApplyError","httpStatus":null,"severity":"error","filePath":"Co-creation-projects/YYHDBL-HelloCodeAgentCli/code_agent/executors/apply_patch_executor.py","lineNumber":153,"sourceCode":"            \n            # 安全检查：确保文件后缀在允许的列表中\n            self._enforce_suffix(target)\n\n            if kind == \"add\":\n                # 添加新文件操作\n                if target.exists():\n                    raise PatchApplyError(f\"Add File target already exists: {rel_path}\")\n                # 创建父目录（如果不存在）\n                target.parent.mkdir(parents=True, exist_ok=True)\n                # 原子写入新文件内容\n                self._atomic_write(target, payload)\n                # 记录变更\n                files_changed.append(rel_path)\n                \n            elif kind == \"delete\":\n                # 删除文件操作\n                if not target.exists():\n                    raise PatchApplyError(f\"Delete File target missing: {rel_path}\")\n                # 删除前先备份文件\n                b = self._backup_file(target, backup_run_dir)\n                backups.append(str(b))\n                # 删除文件\n                target.unlink()\n                # 记录变更\n                files_changed.append(rel_path)\n                \n            elif kind == \"update\":\n                # 更新文件操作\n                if not target.exists():\n                    raise PatchApplyError(f\"Update File target missing: {rel_path}\")\n                # 读取原始文件内容（保留换行符）\n                original = target.read_text(encoding=\"utf-8\").splitlines(keepends=True)\n                # 修改前先备份文件\n                b = self._backup_file(target, backup_run_dir)\n                backups.append(str(b))\n                # 应用更新补丁内容","sourceCodeStart":135,"sourceCodeEnd":171,"githubUrl":"https://github.com/datawhalechina/hello-agents/blob/606a07d341a47be773fab7f4b71177f53f96b2c3/Co-creation-projects/YYHDBL-HelloCodeAgentCli/code_agent/executors/apply_patch_executor.py#L135-L171","documentation":"PatchApplyError raised when a '*** Delete File' operation targets a path that does not exist. The executor verifies presence before deleting (and before creating a backup), so a stale or mistyped delete target aborts. Because operations run sequentially, earlier ops in the same patch may already have been applied — this failure is not rolled back automatically.","triggerScenarios":"Patch contains Delete File for a path already removed (double-apply), a typo'd path, or a file deleted by a concurrent process between patch generation and execution.","commonSituations":"Re-running a patch that partially succeeded earlier; agent's file listing out of date; case-sensitivity or path-separator mismatches.","solutions":["Regenerate the patch against the current tree state (re-list files before planning deletes).","If re-applying, filter out delete ops for files already gone (treat as satisfied).","Restore from the timestamped backup directory if a partial apply left the tree inconsistent."],"exampleFix":"# before\npatch deletes 'src/old.py' but it was already removed -> PatchApplyError\n\n# after\nops = [op for op in parse(patch) if not (op.kind == 'delete' and not Path(op.path).exists())]\npatch = serialize(ops)","handlingStrategy":"type-guard","validationCode":"from pathlib import Path\nmissing = [p for p in delete_targets if not Path(repo_root, p).exists()]\nif missing:\n    patch = drop_ops(patch, missing)  # already-deleted targets are satisfied","typeGuard":"from pathlib import Path\n\ndef filter_stale_deletes(ops):\n    \"\"\"Drop delete ops whose targets no longer exist (idempotent re-apply).\"\"\"\n    return [op for op in ops if op.kind != \"delete\" or Path(op.path).exists()]","tryCatchPattern":"try:\n    executor.apply(patch_text)\nexcept PatchApplyError as e:\n    if \"Delete File target missing\" in str(e):\n        # partial apply possible: verify tree state, then re-apply filtered patch\n        ...","preventionTips":["Re-list the working tree immediately before generating delete operations.","Make re-application idempotent by filtering already-satisfied deletes.","Watch for case-sensitivity and path-separator mismatches between patch and filesystem."],"tags":["python","patching","conflict","code-agent"],"backgroundTag":null,"analyzedSha":"606a07d341a47be773fab7f4b71177f53f96b2c3","analyzedAt":"2026-08-14T22:57:27.446Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}