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Fix NPE in DocumentMerger.doDiff #123 - #2990
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🟡 Changes recommended
The timing-sensitive fix lacks a deterministic regression test covering the reported race.
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What changed in this PR
Prevents duplicate compare content trees and the resulting DocumentMerger NPE during asynchronous initialization.
Changes:
- Detects re-entrant control creation.
- Skips duplicate content creation while a control is already being built.
| File | Description |
|---|---|
CompareEditor.java |
Guards the initialization callback against duplicate compare controls. |
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The "still initializing" timer and the initialization job could both create the contents of the same compare editor input. One of the two content trees stayed alive when the editor switched to another input, and its viewer later diffed against the disposed input. Add a regression test and a DisplayUtils helper for driving the event loop in tests. Fixes eclipse-platform#123
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The "still initializing" timer and the initialization job could both create the contents of the same compare editor input. One of the two content trees stayed alive when the editor switched to another input, and its viewer later diffed against the disposed input.
Fixes #123