Bitfield members wrongly shown in debugger's expressions view (GDB)

Bitfield members are not properly shown in the debugger's "Expressions" view. They work correctly when expanding the object they are members of (either in the "Locals" or in the "Expressions" view), but not when using an expression that directly refers to them, like "myobject.mybitmember".

A sample program to reproduce this is as well as a screenshot attached.

Steps to reproduce:

1. Compile attached sample program "qtc-test.cpp" (based on existing "Bitfields" test for Qt Creator's debugging helpers)
2. Set breakpoint at line 23
3. add expressions to view all of the members for object "s" in the "Expressions" view, e.g. by adding the following expression and then expanding it: "s;s.b;s.c;s.c1;s.d;s.e;s.f;s.front;s.g;s.h;s.i;s.x;s.y;s.z"
4. start debugging with GDB
5. expand the object "s" in the "Locals" view and compare the values that are shown for the members there and in the expressions view

Actual result:

• The correct values and types are shown for the members in the "Locals" view
• Wrong values are shown for many of the bitfield expressions in the "Expressions" view, e.g.

• • "s.c1" is shown as having value "18", but it is 0/false
  • "s.x" is shown as having value 301994906, but it's actually 2