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| Check name | Status | Explanation | Resolution |
|---|---|---|---|
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| Check name | Status | Explanation |
|---|---|---|
| Title check | ✅ Passed | The title clearly identifies the main fix for silent overwrites caused by trailing path separators. |
| Description check | ✅ Passed | The description directly explains the bug, implementation, regression tests, and test results for the changeset. |
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Inline comments:
In `@tests-unit/comfy_test/folder_path_test.py`:
- Around line 161-171: Create the file represented by the result of
get_save_image_path("out", temp_dir) before the trailing-separator lookup, then
assert get_save_image_path("out/", temp_dir) returns the same path metadata and
a counter exactly one greater than plain[2], directly covering cross-prefix
collision avoidance.
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GitHub Actions: CLA Assistant / 0_cla-assistant.txt: Fix saves silently overwriting each other when filename_prefix ends in a separator
Conclusion: failure
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##[endgroup]
(node:2197) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a us...
GitHub Actions: CLA Assistant / cla-assistant: Fix saves silently overwriting each other when filename_prefix ends in a separator
Conclusion: failure
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##[endgroup]
(node:2197) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a us...
🧰 Additional context used
📓 Path-based instructions (5)
**/*
📄 CodeRabbit inference engine (AGENTS.md)
**/*: Keep changes small, direct, and limited to the narrowest necessary code path and smallest number of files.
Prefer practical fixes, minimal dependencies, and existing repository patterns; remove obsolete, dead, unreachable, or unused code.
Preserve existing APIs, node names, model-loading behavior, file layout, and workflow compatibility unless replacement is explicitly intended.
Core ComfyUI must not add outbound internet requests, telemetry, tracking, reporting, remote configuration, or background network activity. User-authorized model downloads are limited to the requested artifact and must exclude telemetry and unrelated metadata.
Files:
folder_paths.pytests-unit/comfy_test/folder_path_test.py
**/*.py
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Normalize third-party return conventions at integration boundaries so core code receives the expected type and shape; avoid undocumented caller-side unwrapping.
Do not addtorch.no_grad,torch.inference_mode, or inference-mode wrappers. Do not add model freeze/unfreeze toggles; only disable globally enabled inference mode when a training path requires gradients.
Remove inference-only training behavior such as dropout while preserving checkpoint and state-dict compatibility; usenn.Identitywhen deleting a module would alter keys or ordering.
Keep imports at module scope except established optional-backend probes or imports required to avoid cycles; avoid unnecessarytry/exceptblocks and use specific exceptions with useful fallbacks.
Do not add workarounds for unsupported library versions, especially PyTorch exception-and-float-cast retries, unless a comment names the exact versions still requiring them.
Let unsupported model formats, invalid quantization metadata, and bad states fail with clear errors instead of silently degrading output.
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Treat dtype, device placement, VRAM use, and offloading as correctness concerns across CPU, CUDA, ROCm, MPS, DirectML, XPU, NPU, and low-VRAM environments.
Prefer existing ComfyUI and Comfy Kitchen operations, quantization helpers, cast/offload helpe...
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folder_paths.pytests-unit/comfy_test/folder_path_test.py
**/*.{py,json}
📄 CodeRabbit inference engine (AGENTS.md)
Treat legacy combo,
io.Combo, andio.DynamicCombovalues affecting filesystem access as untrusted; revalidate them at load/save boundaries withfolder_paths, containment checks, or fixed allowlists.
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folder_paths.pytests-unit/comfy_test/folder_path_test.py
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folder_paths.pytests-unit/comfy_test/folder_path_test.py
🪛 ast-grep (0.45.1)
tests-unit/comfy_test/folder_path_test.py
[warning] 129-129: File path is request-/variable-derived; validate and normalize to prevent path traversal.
Context: open(os.path.join(full_output_folder, name), "w")
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(open-filename-from-request)
🔇 Additional comments (4)
folder_paths.py (1)
522-525: LGTM!tests-unit/comfy_test/folder_path_test.py (3)
122-132: LGTM!
135-149: LGTM!
151-159: LGTM!
…eparator
get_save_image_path() picks the next counter by comparing existing filenames
against the prefix. map_filename() sized that prefix with
os.path.basename(filename_prefix)
while the caller compares against
os.path.basename(os.path.normpath(filename_prefix))
For a prefix that ends in a separator the two disagree: basename('out/') is the
empty string, so no existing file ever matched, the counter stayed at 1, and
every save overwrote the previous one.
Three saves with prefix 'out/', before and after:
before out_00001_.png out_00001_.png out_00001_.png
after out_00001_.png out_00002_.png out_00003_.png
map_filename() now normalizes the same way the comparison does. No behaviour
change for a prefix without a trailing separator: normpath is a no-op there.
|
Good catch on the counter continuation — that was a real hole in the test, not a nitpick. Comparing Added in Failing cases on The CLA is with the repo owner — I have flagged it and will post the signature line once they confirm. |
…nter The review is right that comparing 'out' and 'out/' on an empty directory does not prove anything: both return 1 there, so that assertion passes with the bug still present. The bug resets the counter, so the switch between the two prefix forms has to happen with files already on disk. Three saves as 'out' then three as 'out/' must number 1..6, not 1..3 twice. Fails on master (4 failing cases now, was 3).
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Problem
If
filename_prefixends in a path separator, every save silently overwrites the previous one.get_save_image_path()picks the next counter by matching existing filenames against the prefix. The two halves of that comparison normalize differently:os.path.basename('out/')is the empty string, soprefixis one character of each existing filename and never equalsfilename.max()over an empty sequence raisesValueError, the handler setscounter = 1, and the node writesout_00001_.pngagain — on top of the file it wrote last time.Nothing errors. The graph succeeds, the node reports a saved image, and the previous render is gone.
Three saves, same prefix, on
master(76135e5):filename_prefixoutout_00001_.png,out_00002_.png,out_00003_.pngout/out_00001_.png,out_00001_.png,out_00001_.png❌sub/outout_00001_.png,out_00002_.png,out_00003_.pngsub/out/out_00001_.png,out_00001_.png,out_00001_.png❌sub/sub_00001_.png,sub_00001_.png,sub_00001_.png❌filename_prefixis a free-text widget, so a trailing slash is easy to type — especially when the prefix is being used to organize output into a folder, which is exactly when losing renders hurts most. The same applies to a trailing backslash on Windows.Change
One line:
map_filename()normalizes the prefix the same way the comparison does.For a prefix without a trailing separator
os.path.normpathis a no-op on the basename, so nothing changes for existing workflows.out/andoutnow resolve to the same folder and filename and therefore share one counter, which is what the rest of the function already assumed.Testing
Added to
tests-unit/comfy_test/folder_path_test.py, driving the node's actual save loop (resolve → write the file → resolve again):out/,sub/out/,sub/each produce three distinct filenamesout,sub/outstill produceout_00001_…out_00003_— the no-regression guardout/andoutreturn the samefull_output_folder,filename,counterandsubfolderReverting only
folder_paths.py: 3 failed, 275 passed. With the change: 278 passed, 1 skipped, 0 failed (pytest tests-unit/ --continue-on-collection-errors).ruff checkclean on both files.One caveat, stated rather than hidden: 38 test modules fail to collect in my environment because torch and the other model-runtime dependencies are not installed, and that count is identical before and after. They are unaffected either way — this change is in a pure-Python path helper with no torch involvement — but I did not run them, so I am not claiming they pass.