QCoreApplication::arguments() crashes randomly on Linux amd64 in optimized build

With a 64-bit Linux amd64 build and Qt 5.9.0, the following will randomly crash (~50% of the time) with optimization (-O2) enabled:

#include <QtCore>

QCoreApplication *g_app;

void AA_init(int argc, char *argv[])
{{{}}
  g_app = new QCoreApplication(argc, argv);
}

void AA_run()
{{{}}
  QCoreApplication::arguments();
}

int main(int argc, char *argv[])
{{{}}
  AA_init(argc, argv);
  AA_run();
}

 I can eliminate the crash by:

• Moving the "arguments()" call to follow the "new" statement in "AA_init()".
• Moving "AA_run()" to follow the "new" statement in "AA_init()".

Upon crashing, the application will output: 

terminate called after throwing an instance of 'std::bad_alloc'
{{ what(): std::bad_alloc}}

 Stack trace from GDB  ]is attached.