/in/foo.c: In function 'sum':
/in/foo.c:25:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=1;i<m;i++)
  ^~~
/in/foo.c:27:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   s+=d;
   ^