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-rw-r--r--plumbing/format/index/decoder.go2
1 files changed, 2 insertions, 0 deletions
diff --git a/plumbing/format/index/decoder.go b/plumbing/format/index/decoder.go
index 6634688..f43b1c5 100644
--- a/plumbing/format/index/decoder.go
+++ b/plumbing/format/index/decoder.go
@@ -273,6 +273,8 @@ func (d *Decoder) readExtension(idx *Index) error {
return err
}
default:
+ // See https://git-scm.com/docs/index-format, which says:
+ // If the first byte is 'A'..'Z' the extension is optional and can be ignored.
if header[0] < 'A' || header[0] > 'Z' {
return ErrUnknownExtension
}