   0  inline_call_r_r <JitCode 'allocate_instance__W_EnvironmentError'>, R[%r0] -> %r0
   6  -live- %r0
   6  setfield_gc_r %r0, $<* struct pypy.interpreter.baseobjspace.W_Root>, FieldDescr<pypy.module.exceptions.interp_exceptions.W_EnvironmentError.inst_w_errno>
  11  setfield_gc_r %r0, $<* struct pypy.interpreter.baseobjspace.W_Root>, FieldDescr<pypy.module.exceptions.interp_exceptions.W_EnvironmentError.inst_w_strerror>
  16  setfield_gc_r %r0, $<* struct pypy.interpreter.baseobjspace.W_Root>, FieldDescr<pypy.module.exceptions.interp_exceptions.W_EnvironmentError.inst_w_filename>
  21  setfield_gc_r %r0, $<* struct pypy.interpreter.baseobjspace.W_Root>, FieldDescr<pypy.module.exceptions.interp_exceptions.W_BaseException.inst_w_message>
  26  -live- %r0
  26  goto_if_not_ptr_iszero %r0, L1
  30  ref_return $<* struct pypy.interpreter.baseobjspace.W_Root>
  32  ---
  32  L1:
  32  ref_return %r0
