exit status: 1 with stderr:
<stdin>:3:7: error: definition conflicts with previous value var a = 1 ^ <stdin>:2:7: note: previous definition of 'a' is here var a = 1 ^ <stdin>:2:7: warning: initialization of variable 'a' was never used; consider replacing with assignment to '_' or removing it var a = 1 ~~~~^ _ <stdin>:3:7: warning: initialization of variable 'a' was never used; consider replacing with assignment to '_' or removing it var a = 1 ~~~~^ _