I run qtcreator with the option "Load system GDB pretty printers" set on. This works on my C projects as long as objects are not cells of a C array, but fails as soon as they are. In the following example, I ask GDB to render Point as (x y) :

typedef struct Point { int x, y; } Point;
int main()
{
  Point
    line[] = { {0, 0}, {1, 1} },
    point = line[1];
  return 0; // breakpoint here
} 

Creator displays array items as <not accessible> , as much as in this ASCII rendering:

 Name     Value             Type 
 + line   0x7f...10           Point[2]
     [0]  <not accessible>  Point
     [1]  <not accessible>  Point
   point  (1 1)             Point

Both gdb and qtcreator are under Ubuntu 20.04:

• GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
• Qt Creator 4.11.0

I've also tried Creator 4.14.0 with the same results.

I've investigated a bit, and found that PlainDumper.call in /usr/share/qtcreator/debugger/gdbbridge.py is missing a value.nativeValue in the situation. Rebuilding locally some nativeValue from value and theDumper  does fix  the present example.