returns: 0 returns: 0 returns: 1 returns: 0 returns: 1 returns: 0 returns: 0 returns: 1 returns: 1 returns: 1 returns: 1 returns: 0 returns: 0 returns: 0 returns: 1 returns: 0 returns: 1 returns: 0 returns: 1 returns: 1 returns: 0 ./cond.tests: [[: 4+: syntax error: operand expected (error token is "+") returns: 1 returns: 0 returns: 0 returns: 1 returns: 0 returns: 0 returns: 1 returns: 0 ok