/in/foo.c: In function 'fn':
/in/foo.c:26:8: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
        else
        ^~~~
/in/foo.c:28:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
     return 0;
     ^~~~~~
/in/foo.c:23:12: warning: unused variable 'i' [-Wunused-variable]
        int i;
            ^