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Improve an error message #2595

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Improve an error message #2595

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4 changes: 3 additions & 1 deletion storage/storage_reference.go
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Original file line number Diff line number Diff line change
Expand Up @@ -153,7 +153,9 @@ func (s *storageReference) resolveImage(sys *types.SystemContext) (*storage.Imag
}
if s.id == "" {
logrus.Debugf("reference %q does not resolve to an image ID", s.StringWithinTransport())
return nil, fmt.Errorf("reference %q does not resolve to an image ID: %w", s.StringWithinTransport(), ErrNoSuchImage)
// %.0w makes the error visible to error.Unwrap() without including any text.
// ErrNoSuchImage ultimately is “identifier is not an image”, which is not helpful for identifying the root cause.
return nil, fmt.Errorf("reference %q does not resolve to an image ID%.0w", s.StringWithinTransport(), ErrNoSuchImage)
}
if loadedImage == nil {
img, err := s.transport.store.Image(s.id)
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