[fltk/fltk] SIGSEGV with OPTION_USE_PANGO and fl_draw(const char *, int, int, int, int, Fl_Align) when strlen == 1 (#276) - Forums

On Linux, Compiling FLTK 1.4 with OPTION_USE_PANGO=ON, then using fl_draw(const char *, int, int, int, int, Fl_Align) causes a segmentation fault when strlen == 1.

#include <FL/Enumerations.H>
#include <FL/Fl.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Double_Window.H>
#include <FL/fl_draw.H>

class MyBox : public Fl_Box {
  public:
    MyBox(int x, int y, int w, int h, const char* label = NULL)
        : Fl_Box(x, y, w, h, label) {
            box(FL_DOWN_BOX);
            color(FL_WHITE);
        }

    void draw() {
        Fl_Box::draw();
        fl_color(FL_BLACK);
        fl_draw("s", x() + 10, y() + 5, w() - 20, h(), FL_ALIGN_LEFT | FL_ALIGN_CENTER);
    }
};

int main() {
    auto win = new Fl_Double_Window(400, 300);
    auto my_box = new MyBox(160, 200, 80, 30);
    win->end();
    win->show();
    return Fl::run();
}

Passing a string with any other length or NULL doesn't cause a segfault. Also not using pango, doesn't cause a segfault (with the default Xft font backend).

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