Version: (using KDE KDE 3.5.3)
Installed from: Debian testing/unstable Packages
KCalc just crashes if you try to call function like "log" or "sin" on infinity ("inf" on display). To make infinity value just press "1/x" button when display shows "0".
It would be nice to write smth like "error" on display in these cases instead of crashing.
KCalc version is 2.0.3
For me it does not crash, but it always gives (for sin, cos, log, etc.)
So I agree that you are right: There must be an unhandled error. I will have a look.
Thanks for the bug report. I just fixed everything for KCalc 2.0.4