Variables in Locals and Expressions not accessible in QT Creator

Question

If I try to debug my C++ program in QT Creator the Locals and Expressions window shows me the variables in the program. However all the values show "< not accessible >".

Screenshot:

How do I get the values to show? I can print the values out with cout so I know they are initialized.

Edit: It seems like it only applies to strings

Specs/other:

• Windows 8, 64bit
• QT 5.2.0
• MinGW 32bit, I think 4.8
• QT Creator 3.0.0

Answer 1

尝试删除Tools / Options / Debugger / GDB / Load系统GDB漂亮打印机上的复选标记，看看这是否有所不同。

Answer 2

Solved:

For composite types (std::string and other classes) it doesn't automatically convert to some default type (eg std::string to char*); so what you need to do it right-click on a value, then select the submenu Change local display format-> Raw structure, and then keep opening the symbol until you get something meaningful (when possible). Eg for std::string, after you change to “Raw structure”, you get your actual string (by clicking the “+” sign to the left of your symbol) in: _M_dataplus->_M_p

Note that you can “Change local display format” for one symbol (the one you selected) or for all symbols of that type (eg you select a std::string, then all std::strings change to Raw structure)

From this link: http://qt-project.org/forums/viewthread/36121/

Credit goes to Gyll.