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Prevent NPE in CommentMustAsDiff if no hunk header (#15199) 

I do not understand how this can happen or why.

There is an apparent possibility for a comment.Patch to be missing a hunk header
- this should not happen and do not understand how. But it appears to happen on
1.13 at least in some case.

This PR will simply add a new section if the cursection is empty
thus preventing the NPE.

Fix #15198

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
This commit is contained in:
zeripath 2021-04-01 19:29:14 +01:00 committed by GitHub
parent ff460ca74d
commit a351b22dc0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 15 additions and 0 deletions
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15
services/gitdiff/gitdiff.go
View File

@ -1014,6 +1014,11 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
}
diffLine := &DiffLine{Type: DiffLineAdd, RightIdx: rightLine}
rightLine++
if curSection == nil {
// Create a new section to represent this hunk
curSection = &DiffSection{}
curFile.Sections = append(curFile.Sections, curSection)
}
curSection.Lines = append(curSection.Lines, diffLine)
case '-':
curFileLinesCount++
@ -1026,6 +1031,11 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
if leftLine > 0 {
leftLine++
}
if curSection == nil {
// Create a new section to represent this hunk
curSection = &DiffSection{}
curFile.Sections = append(curFile.Sections, curSection)
}
curSection.Lines = append(curSection.Lines, diffLine)
case ' ':
curFileLinesCount++
@ -1036,6 +1046,11 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
diffLine := &DiffLine{Type: DiffLinePlain, LeftIdx: leftLine, RightIdx: rightLine}
leftLine++
rightLine++
if curSection == nil {
// Create a new section to represent this hunk
curSection = &DiffSection{}
curFile.Sections = append(curFile.Sections, curSection)
}
curSection.Lines = append(curSection.Lines, diffLine)
default:
// This is unexpected