https://bugs.kde.org/show_bug.cgi?id=498381
Bug ID: 498381
Summary: Very slow image parsing in XCF plugin
Classification: Frameworks and Libraries
Product: frameworks-kimageformats
Version: 6.9.0
Platform: Compiled Sources
OS: All
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: alex.me...@kde.org
Reporter: iph...@gmail.com
CC: aa...@kde.org, kdelibs-b...@kde.org
Target Milestone: ---
The following file takes 7 seconds to parse.
Reproducer:
```
const QByteArray data = QByteArray::fromBase64(
"AWdpbXAgeGNmAAAwAAoAAABbAAAAAzMAAAAAAAAAAAAAAAYAcAEAAAAAAwAAAAAAAf//////bW1t"
"bW1tbW1tbW1tbW1tbW3/////////////bW1tnZ2dnZ2dnZ2dJSFQUy1BZG9iZZ2dnZ2dnZ2dnZ2d"
"nZ2dnZ2dnZ2dnXJycnJycnJycnJycnJycnJycnJycnJycnJtfm1tbW1tbW1tAAAAAAAAAAABMQAA"
"7wYAAAAAAAAAAQAAAAAAAAAAAAAAAAkAAAAJ22M/");
QImage::fromData(data.mid(1), "XCF");
```
Here's another file that takes over a minute (be sure to remove the first
byte):
```
AWdpbXAgeGNmAAAwAAoAAABbAAAAAzMAAAAAAAAAAAAAAAYAcAEAAAAAAwAAAAAAAf//////bW1t
bW1tbW1tbW1tbW1tbW3/////////////bW1tnZ2dnZ2dnZ2dJSFQUy1BZG9iZZ2dnZ2dnZ2dnZ2d
nZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2d
nZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ1ycnJycnJycnJycnLJcnJy
cnJycnJycnJycnJycnJycnJtfm1tbW1tbW1tAAAAAAAAAAABMgAA7wYAAAAAAAAAAQAAAAAAAAAA
AAAAAAkAAAAJ22M/
```
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