Yes, scrolling a split editor while a tooltip is showing can start a tight feedback loop that makes DrRacket unresponsive. I discovered it yesterday as well. I just pushed a fix, which will show up after tonight's nightly build and of course in v5.2.1.

Neil T

On 11/16/2011 08:20 PM, José Lopes wrote:
Hello,

Check syntax in split window seems to enter an infinite loop...

Regards,
José


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