On Wed, 17 Feb 2021 15:27:40 +0100 Mattias Gaertner via fpc-pascal <fpc-pascal@lists.freepascal.org> wrote:
> Hi, > > I have a strange bug, that suddenly Self becomes a random value when > calling an overridden virtual method. It happens when activating a > TCustomSQLQuery. > Below is a gdb stacktrace with fpc 3.3.1, where Self became 0. On > other runs I saw various other values. My patch turns the crash into a normal Exception: https://bugs.freepascal.org/view.php?id=38503 > Where to start looking? > It happens in Lazarus at designtime, so maybe some vmt issue? Turns out it was an evil combination of optimization and misleading gdb output. Mattias _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
