From @zoffixznet

Perhaps it should throw when it was given trailing stuff after the relevant char?

00​:49 dpk m​: say unival("1\x[300]23")
00​:49 camelia rakudo-moar 98fae3​: OUTPUT​: «1␤»
00​:50 dpk that … seems like a potential security issue for some apps
00​:51 m​: say unival("1\x[300]dasdsadsadsadsadasdsa")
00​:51 camelia rakudo-moar 98fae3​: OUTPUT​: «1␤»

From @zoffixznet

uniname seems to have the same behaviour​:

<Zoffix__> m​: say uniname 'meows'
<camelia> rakudo-moar 39d50a​: OUTPUT​: «LATIN SMALL LETTER M␤»

From @smls

On Tue, 03 Oct 2017 17​:52​:39 -0700, cpan@​zoffix.com wrote​:

Perhaps it should throw when it was given trailing stuff after the
relevant char?

00​:49 dpk m​: say unival("1\x[300]23")
00​:49 camelia rakudo-moar 98fae3​: OUTPUT​: «1␤»
00​:50 dpk that … seems like a potential security issue for some
apps
00​:51 m​: say unival("1\x[300]dasdsadsadsadsadasdsa")
00​:51 camelia rakudo-moar 98fae3​: OUTPUT​: «1␤»

I assume it's modeled after `ord`, which also does this​:

  ➜ say "Hello".ord; # 72

...which in turn probably does it because its Perl 5 version always did it​:

  $ perl -E 'say ord "Hello"
  72

Whether this is really the best thing to do, or if a warning/error would be better, I don't know.

Note that Perl 6 also has plural versions of all three of these though, which give the result for every character in the string​:

  ➜ .say for "123".ords;
  49
  50
  51

  ➜ .say for "123".uninames;
  DIGIT ONE
  DIGIT TWO
  DIGIT THREE

  ➜ .say for "123".univals;
  1
  2
  3

The RT System itself - Status changed from 'new' to 'open'

From @samcv

As has been pointed out, it only uses the first grapheme to look up the value similar to uniname, ord and such this isn't a bug but is expected functionality. Doing anything differently would break existing code. Going to close this as rejected.

@samcv - Status changed from 'open' to 'rejected'