From @masak

<masak> rakudo​: say (-5 ... ^5).perl
<p6eval> rakudo ae1300​: OUTPUT«(-5, -4, -3, -2, -1, 0, 0, 1, 2, 3, 4)␤»
<diakopter> std is rebuilding, I think
* masak submits rakudobug
<masak> rakudo​: say (-5 ... 5).perl
<p6eval> rakudo ae1300​: OUTPUT«(-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5)␤»
<masak> aha!

So it's the prefix​:<^> that does it. The infix​:<...> operator probably
steps up from -5 to 0, and then includes 0 again as the first value of
C<^5>.

From @pmichaud

This appears to be working in current master trunk; assigning to
moritz++ for spectest coverage and ticket closing.

Pm

@pmichaud - Status changed from 'new' to 'resolved'

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

@moritz - 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/S03-operators/series.t

commit b0f602506f06761e471735595b380b601c30178a
Author​: moritz <moritz@​c213334d-75ef-0310-aa23-eaa082d1ae64>
Date​: Tue Jun 29 09​:57​:00 2010 +0000

  [t/spec] test for RT #​75698, -5 ... ^5 should contain only one 0
 
  git-svn-id​: http://svn.pugscode.org/pugs@&#8203;31496 c213334d-75ef-0310-aa23-eaa082d1ae64

diff --git a/t/spec/S03-operators/series.t b/t/spec/S03-operators/series.t
index 000a487..0e09041 100644
--- a/t/spec/S03-operators/series.t
+++ b/t/spec/S03-operators/series.t
@@ -138,6 +138,10 @@ is (1, -1, 1 ... -2), Nil, 'empty alternating series (2)';
     is ~(1 ...^ 0), '1', 'singleton exclusive series';
 }
 
+
+# RT #75698
+ok ?(one((-5 ... ^5).flat) == 0), '-5 ... ^5 produces just one zero';
+
 done_testing;
 
 # vim: ft=perl6