12.7 Known Bugs in gawk

• The `-F' option for changing the value of FS (see section Command-Line Options) is not necessary given the command-line variable assignment feature; it remains only for backwards compatibility.

• Syntactically invalid single character programs tend to overflow the parse stack, generating a rather unhelpful message. Such programs are surprisingly difficult to diagnose in the completely general case and the effort to do so really is not worth it.