As pointed out by ClangSA highlighing in QtCreator, but also by Coverity, the way the TCBPoint default constructor was written meant that _t, _c, and _b were left uninitialized even if the user value-initialized a TCBPoint object: TCBPoint p = {}; // ought to zero-initialize, but doesn't Fix by removing all the constructors. Being just a POD^Waggregate is more than sufficient for this type and aggregate initialization behaves predictably: TCBPoint p; // partially-formed (_t, _b, _c are uninitialized) TCBPoint p = {}; // well-formed, value-initialized: _t, _c, _b are 0.0 Amends b9f0bde16e85161666d5090952955bebacc40f89. Coverity-Id: 11609 Pick-to: 6.11 6.10 6.8 6.5 Change-Id: I301e5a7b68e86ddf967348b683f7a97fdc0b598d Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>