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Build Identifier: 20100917-0705 Non-stop mode, toggle breakpoint, at first user clicks the marker bar to add breakpoint, if he did not wait for the icon changing from 'pending' to 'done', and click the icon again, it will lead to the inconsistent state between GUI and GDB backend, and when terminate debug process will get an error dialog ‘Clear Breakpoint status have encounter a problem’, the detailed message is ‘Breakpoint does not have an associated marker’. It could be easily reproduced under the situation that backend could not response the add breakpoint operation quickly. It maybe not a problem from the perspective of normal user behavior, while I think it’s also an issue caused by the asynchronous style design, the eclipse debug part and CDI part think that if the call to DSF is returned, the breakpoint should be added successfully, while the MIBreakpointManager will just initiate an asynchronous operation. Reproducible: Sometimes Steps to Reproduce: 1.Non-stop mode 2.To make it could be reproduced everytimes, could add a sleep in GDBBackend#interruptAndWait 3.Toggle marker bar to add/delete breakpoint