Prevent NPE in CSV diff rendering when column removed (#17018) (#17377)

Backport of #17018 Fixes #16837 if a column is deleted.
go-gitea · Oct 20, 2021 · befb6be · befb6be
1 parent 79f0b1a
commit befb6be
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Showing 7 changed files with 351 additions and 136 deletions.
diff --git a/modules/csv/csv.go b/modules/csv/csv.go
@@ -32,6 +32,9 @@ func CreateReaderAndGuessDelimiter(rd io.Reader) (*stdcsv.Reader, error) {
 	var data = make([]byte, 1e4)
 	size, err := rd.Read(data)
 	if err != nil {
+		if err == io.EOF {
+			return CreateReader(bytes.NewReader([]byte{}), rune(',')), nil
+		}
 		return nil, err
 	}