Error handling code has no business bloating Qt executable code size, so take two more steps to reduce its impact, on top of the locking it away in a Q_DECL_COLD_FUNCTION: First, split the 'where' argument into 'class' and 'method', in order to facilitate the reuse of the class strings across users. Second, move the QRegularExpression::pattern() call into the warning function, to centralize the temporary QString handling code. Saves half a KiB in text size on optimized Clang 19 Linux AMD64 C++23 builds. Pick-to: 6.10 6.9 6.8 Change-Id: I7fe23bdafc9f63d0d43b801e704866be9961648c Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>