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  1. Qt Creator
  2. QTCREATORBUG-22606

Debugger cannot display vector when compiled with '-D_GLIBCXX_DEBUG'

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Not Evaluated
    • Resolution: Done
    • Affects Version/s: Qt Creator 4.10.0-beta1
    • Fix Version/s: Qt Creator 4.10.0-beta2
    • Component/s: Debugger
    • Labels:
      None
    • Environment:
      Debian testing with
      * GDB 8.2.1
      * g++ (Debian 8.3.0-6) 8.3.0
    • Platform/s:
      Linux/X11
    • Commits:
      aedc0ca91bd1bc0ad9a3e411f8c9996250e14d61 (qt-creator/qt-creator/4.10)

      Description

      Displaying the value of std::vector (and presumable other std library container) objects in the local variable pane doesn't work correctly if the program is compiled with the '-D_GLIBCXX_DEBUG' compiler flag (which results in obect size changes).

      Sample program to reproduce ("test.cpp"):

      #include <vector>
      
      int main() {
          std::vector<int> v;
          v.push_back(1);
          return 0; // breakpoint here, check value of 'v'
      };
      

       
      Makefile:

      all:
              g++ -g -O0 -D_GLIBCXX_DEBUG -o test test.cpp
      

      Sample steps to reproduce (possible with other project type than CompilationDatabase as well):

      • make sure that GDB system pretty printers are disabled, so that Qt Creator's own printers are used
      • run 'bear make' to compile the program and generate the compilation database
      • import the project into Qt Creator using the generated 'compile_commands.json' file
      • set breakpoint at the return statement
      • start debugging
      • observe the displayed value for the vector 'v' in the debugger's locals view

      Result: The value "<0 items>" is displayed for 'v' and there's no possibility to expand the vector to see the element that was inserted.

      Expected result: The value "<1 item>" should be displayed for 'v' and it should be possible to expand it to see that the vector contains an element with value '1'.

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        # Subject Branch Project Status CR V

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            Assignee:
            hjk hjk
            Reporter:
            michaelweghorn Michael Weghorn
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              Dates

              Created:
              Updated:
              Resolved:

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