From @masak

<masak> rakudo​: -> *@​a { @​a[+0] }.()
<p6eval> rakudo 78faa0​: OUTPUT«No applicable candidates found to
dispatch to for 'postcircumfix​:<[ ]>'. Available candidates are​:␤​:(Mu
: Int $i;; *%_)␤​:(Mu : Block $b;; *%_)␤​:(Mu :
!whatever_dispatch_helper ;; *%_) [...]
* masak submits rakudobug
<moritz_> rakudo​: -> *@​a { @​a[0] }.()
<p6eval> rakudo 78faa0​: ( no output )
<masak> something with + that makes it not a good index.
<moritz_> rakudo​: say (+0).WHAT
<p6eval> rakudo 78faa0​: OUTPUT«Num()␤»
<masak> that, probably :)
<moritz_> :-)
<masak> the funny thing is that it works with non-slurpy arrays​:
<masak> rakudo​: -> @​a { say @​a[+0] }.([5])
<p6eval> rakudo 78faa0​: OUTPUT«5␤»
<moritz_> yeh knew, we've had lots of trouble with slurpy params
<moritz_> colomon and me

From @bbkr

$ perl6 -e '-> *@​a { @​a[+0] }.()'

(compiles without error)

# using sample data​:
$ perl6 -e '-> *@​a { say @​a[+0] }.([5])'
5

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

From @bbkr

taken for tests

[14​:32] <moritz_> bbkr​: S06-signature/slurpy-params.t probably

From @bbkr

tests added in t/spec/S06-signature/slurpy-params.t

@bbkr - Status changed from 'open' to 'resolved'

From @kyleha

This is an automatically generated mail to inform you that tests are now available in t/spec/S06-signature/slurpy-params.t

commit c5d5e34edb598ce84b0858855707ca20fbeabf94
Author​: bbkr <bbkr@​c213334d-75ef-0310-aa23-eaa082d1ae64>
Date​: Tue Aug 3 12​:41​:02 2010 +0000

  [t/spec] tests for RT #​74410 The combination of prefix​:<+> and slurpy arrays doesnt work
 
  git-svn-id​: http://svn.pugscode.org/pugs@&#8203;31893 c213334d-75ef-0310-aa23-eaa082d1ae64

diff --git a/t/spec/S06-signature/slurpy-params.t b/t/spec/S06-signature/slurpy-params.t
index 5c4d542..ddd4139 100644
--- a/t/spec/S06-signature/slurpy-params.t
+++ b/t/spec/S06-signature/slurpy-params.t
@@ -323,6 +323,12 @@ eval_dies_ok 'sub rt65324(*@x, $oops) { say $oops }',
     A(5, 4);
 }
 
+# RT #74410
+{
+    is -> *@a { @a[+0] }.([5]), 5,
+        'slurpy array can be indexed if index contains prefix:<+>';
+}
+
 done_testing;
 
 # vim: ft=perl6