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.
• If your system actually has support for `/dev/fd' and the associated `/dev/stdin', `/dev/stdout', and `/dev/stderr' files, you may get different output from gawk than you would get on a system without those files. When gawk interprets these files internally, it synchronizes output to the standard output with output to `/dev/stdout', while on a system with those files, the output is actually to different open files (see section Special File Names in gawk).
• 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.

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