Additional: an apparently-null string operation, such as substituting a substring (appearing in the Str) with itself, can mangle the string in the same manner as .perl.EVAL:
> Blob[uint8].new(233, 1).decode("utf8-c8").subst("\x[1]",
> "\x[1]").encode("utf8-c8").perl
Blob[uint8].new(244,143,191,189,120,69,57,1)
-zefram
