From @masak

<masak> rakudo​: say 1.++()
<p6eval> rakudo c83cf2​: OUTPUT«Could not find non-existent sub
&postfix​:<.> [...]
<masak> std​: say 1.++()
<p6eval> std 29872​: OUTPUT«ok 00​:01 107m␤»
<jnthn> wtf
<masak> it parses, but as what?
<jnthn> I hate to imagine.
<masak> the error message should be some kind of tip-off. I just don't
know what kind.
<jnthn> It's a "lol you're failing at parsing postfixes" tip-off.
* masak submits rakudobug

@coke - Status changed from 'new' to 'open'

From @bbkr

NOM​: still broken

bbkr​:nom bbkr$ ./perl6 -e '1.++()'
Could not find sub &postfix​:<.>

From @Mouq

Correct error is now thrown on nom​:
11​:38 < Mouq> r​: 1.++()
11​:38 <+camelia> rakudo e3b73d​: OUTPUT«Cannot modify an immutable value␤
in sub␤ postfix​:<++> at src/gen/CORE.setting​:4000␤ in sub
postfix​:<++> at␤ src/gen/CORE.setting​:2216␤ in block at
/tmp/Ipput8Jp1R​:1␤␤»

From @Mouq

On Sun Sep 01 08​:40​:40 2013, Mouq wrote​:

Correct error is now thrown on nom​:
11​:38 < Mouq> r​: 1.++()
11​:38 <+camelia> rakudo e3b73d​: OUTPUT«Cannot modify an immutable value␤
in sub␤ postfix​:<++> at src/gen/CORE.setting​:4000␤ in sub
postfix​:<++> at␤ src/gen/CORE.setting​:2216␤ in block at
/tmp/Ipput8Jp1R​:1␤␤»

Since this had to do with dotty postfixes in general not working, and since dotty postfixes are tested in S02-lexical-conventions/unspace.t, I'm marking this as resolved

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