#0  0x7F22291CA407
#1  0x1155997
#2  0xCA4D86
#3  0xC16B95
#4  0x403FFD
#5  0x403C2C
#6  0x7F22286D3B44
#7  0x403C5C
#8  0xFFFFFFFFFFFFFFFF

--- !ERROR
message: |
    Fortran open returned iostat 21 while opening: /
    , IOMSG: '/' is a directory
src_file: Subroutine Unknown
src_line: 0
...

Traceback (most recent call last):
  File "test.py", line 10, in <module>
    system.get_potential_energy()
  File "/home/askhl/src/ase/ase/atoms.py", line 676, in get_potential_energy
    energy = self._calc.get_potential_energy(self)
  File "/home/askhl/src/ase/ase/calculators/calculator.py", line 422, in get_potential_energy
    energy = self.get_property('energy', atoms)
  File "/home/askhl/src/ase/ase/calculators/calculator.py", line 461, in get_property
    self.calculate(atoms, [name], system_changes)
  File "/home/askhl/src/ase/ase/calculators/calculator.py", line 620, in calculate
    (self.name, errorcode))
RuntimeError: abinit returned an error: 1