Misleading error message from mpiexec with missing #! interpreter

[iljah]

With openmpi 2.0.2 compiled from source I try to execute this script (test.sh):

#!/bin/nonexistent
echo works

and the error message from mpiexec -n 1 is very confusing:

...
  Application name:  ./test.sh
  Error:             No such file or directory

It took me a long while to figure out what was wrong with my mpi4py script, which had a wrong #! line due to virtualenv weirdness...