/in/foo.c: In function 'isprime':
/in/foo.c:19:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=2;i<=x-1;i++)
  ^~~
/in/foo.c:22:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   if(i<x)
   ^~