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CidFromReader wraps valid io.EOF in ErrInvalidCid #152

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gammazero opened this issue Apr 1, 2023 · 1 comment · Fixed by #151
Closed

CidFromReader wraps valid io.EOF in ErrInvalidCid #152

gammazero opened this issue Apr 1, 2023 · 1 comment · Fixed by #151
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@gammazero
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gammazero commented Apr 1, 2023

When reading from an io.Reader that has no data, the io.EOF error should not be wrapped in ErrInvalidCid. This is not an invalid CID, and is not the same as a partial read which is indicated by io.ErrUnexpectedEOF.

This is an issue because existing code that uses CidFromReader may check for the end of an input stream by if err == io.EOF instead of the preferred if errors.Is(err, io.EOF), and that code will break at runtime after upgrading to go-cid v0.4.0.

@gammazero gammazero added the need/triage Needs initial labeling and prioritization label Apr 1, 2023
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