Ctrl+C causes GHCi 8.2.1 to "exit" in Windows (which didn't happen in 8.0.2)
On Windows, the situation regarding Ctrl+C in GHCi has always been a little flaky in the sense that some shells (e.g.,
mintty-based ones) don't intercept Ctrl+C properly, causing GHCi to exit prematurely. However, up until 8.0.2, Ctrl+C was being intercepted correctly on
cmd.exe and PowerShell.
In GHC 8.2.1, however, this has changed. If you hit Ctrl+C in GHCi on PowerShell, then GHCi will appear to "exit" (in the sense that the prompt will go back to the PowerShell one). However, if you try typing and entering commands, there's a 50-50 chance it will be interpreted by PowerShell or a lingering GHCi process (indicating that GHCi wasn't really killed!).
(Apologies for the rather crude description, but I'm not sure of a better way to report what is going on here.)