[PROTON-1891] empty composite buffer slice should not allow appending new data

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: proton-j-0.27.1
• Fix Version/s: proton-j-0.27.2, proton-j-0.28.0
• Component/s: proton-j
• Assignee: Robbie Gemmell
• Reporter: Robbie Gemmell
• Created: 10/Jul/18 12:06
• Updated: 17/Jul/18 09:21
• Resolved: 10/Jul/18 12:08

Description

The CompositeReadableBuffer allows aggregating incoming data to be used by other areas. If a CRB is sliced we prevent appending the slice with new data, however a specific empty slice is returned if the buffer had no readable data and this doesn't do the same as intended.