We encountered a problem when using the debugger from qtcreater with the gcc 9.1.0. The values of the std::string were not printed, they were marked as : <not accessible>. We found the fix on stackoverflow.
The fix is simple, you need to change the file: /usr/share/qtcreator/debugger/stdtypes.py as shown in the diff:
640c640
< (size, alloc, refcount) = d.split("ppp", value.address() + d.ptrSize())
---
> (size, alloc, refcount) = d.split("ppp", data - 3 * d.ptrSize())
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< if size > 1000:
< size = 1000
---
> d.check(0 <= size and size <= alloc and alloc <= 100*1000*1000)