[fwip]

EDIT: I am incorrect, please ignore. (Original text below, for posterity).

Nit: In many languages, doesn't this depend on what foo() does? e.g:

  foo() {
    exit(0);
  }

[loeg]

No? The foo() invocation is never reached because the while loop never terminates.

[fwip]

Apologies; I misread the function call as being inside the loop.