[Bug 5126] New: awk doesn't handle C-escapes in argument to -F

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5126

           Summary: awk doesn't handle C-escapes in argument to -F
           Product: Busybox
           Version: 1.19.x
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Standard Compliance
        AssignedTo: unassigned at busybox.net
        ReportedBy: dubiousjim at gmail.com
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


BusyBox 1.19.3, built against uClibc 0.9.32, on i686 Linux

This works properly:
$ printf 'abc!def' | awk -v FS='\x21' '{print $1}'
abc

This should work the same way, but doesn't:
$ printf 'abc!def' | awk -F'\x21' '{print $1}'
abc!def

The same issue affects `awk -F'\t' ...` and so on.

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