From @drforr

OS​: Ubuntu 14.10 Linux 64-bit, 2GiB RAM, VirtualBox
Host​: Windows 8 Intel i5 Core

rakudo commit 67a75c1e1d9ed99326b7e426eea3cd969dba35ea
Date​: Sat Feb 28 16​:16​:52 2015 +0100

Accidentally called $class.new(...) without a matching signature. The
compiler correctly reports that it could not find a matching signature,
but incorrectly does *not* report the package/file/line where the bad
call occurred. Incidentally, the signature it *did* try has a trailing
'*%_' that doesn't occur in the actual code, but that may be a compiler
artifact.

The entirety of the error is​:

--cut here--
===SORRY!===
Cannot call 'new'; none of these signatures match​:
:(Polar $​: Real \mag, Real \theta, *%_)
--cut here--

Below is the class, followed by the admittedly incorrect attempt to
invoke it​:

--cut here--
class Polar {
  proto method new(|) { * }
  multi method new(Real \mag, Real \theta) { }
}

constant j = Polar.new( 0e0 );

say j.re;
--cut here--

From @Mouq

FWIW the *%_ is correct. I'm marking this LTA error as dependent upon #​114204, since that ticket covers the lack of Capture information in the error.

On another note, changing `constant j` to `my \term​:<j>` or `my $j` restores the line numbers to the error. This gives a clue, since the RHS of constants are evaluated at compile time. And indeed, that seems to be the culprit for the missing line numbers​:

$ perl6 -e'class Polar {proto method new (|) {*}; multi method new(Real \mag, Real \theta) { }}; Polar.new(1e0)'
Cannot call 'new'; none of these signatures match​:
:(Polar $​: Real \mag, Real \theta, *%_)
  in block <unit> at -e​:1

$ perl6 -e'class Polar {proto method new (|) {*}; multi method new(Real \mag, Real \theta) { }}; BEGIN Polar.new(1e0)'
===SORRY!===
Cannot call 'new'; none of these signatures match​:
:(Polar $​: Real \mag, Real \theta, *%_)
$ perl6 -e'class Polar {proto method new (|) {*}; multi method new(Real \mag, Real \theta) { }}; CHECK Polar.new(1e0)'
===SORRY!===
Cannot call 'new'; none of these signatures match​:
:(Polar $​: Real \mag, Real \theta, *%_)

I found ticket #​81502 which covers this error, and am adding that as another dependency for this bug.

I have no problem if someone wants to close this as being a duplicate. The two dependencies seem to cover the problem, although this ticket/use case may still be useful to have :)

On Mon Mar 02 12​:41​:03 2015, drforr@​pobox.com wrote​:

OS​: Ubuntu 14.10 Linux 64-bit, 2GiB RAM, VirtualBox
Host​: Windows 8 Intel i5 Core

rakudo commit 67a75c1e1d9ed99326b7e426eea3cd969dba35ea
Date​: Sat Feb 28 16​:16​:52 2015 +0100

Accidentally called $class.new(...) without a matching signature. The
compiler correctly reports that it could not find a matching signature,
but incorrectly does *not* report the package/file/line where the bad
call occurred. Incidentally, the signature it *did* try has a trailing
'*%_' that doesn't occur in the actual code, but that may be a compiler
artifact.

The entirety of the error is​:

--cut here--
===SORRY!===
Cannot call 'new'; none of these signatures match​:
:(Polar $​: Real \mag, Real \theta, *%_)
--cut here--

Below is the class, followed by the admittedly incorrect attempt to
invoke it​:

--cut here--
class Polar {
proto method new(|) { * }
multi method new(Real \mag, Real \theta) { }
}

constant j = Polar.new( 0e0 );

say j.re;
--cut here--

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

From @jnthn

On Mon Mar 02 12​:41​:03 2015, drforr@​pobox.com wrote​:

Accidentally called $class.new(...) without a matching signature. The
compiler correctly reports that it could not find a matching signature,
but incorrectly does *not* report the package/file/line where the bad
call occurred. Incidentally, the signature it *did* try has a trailing
'*%_' that doesn't occur in the actual code, but that may be a compiler
artifact.

The entirety of the error is​:

--cut here--
===SORRY!===
Cannot call 'new'; none of these signatures match​:
:(Polar $​: Real \mag, Real \theta, *%_)
--cut here--

Below is the class, followed by the admittedly incorrect attempt to
invoke it​:

--cut here--
class Polar {
proto method new(|) { * }
multi method new(Real \mag, Real \theta) { }
}

constant j = Polar.new( 0e0 );

say j.re;
--cut here--

It now reports rather more information about what went wrong;

===SORRY!=== Error while compiling z.p6
An exception occurred while evaluating a constant
at z.p6​:6
Exception details​:
  Cannot call new(Polar​: Num); none of these signatures match​:
  (Polar​: Real \mag, Real \theta, *%_)
  in any new at src/Perl6/World.nqp​:1313
  in block at z.p6​:6

Test added in S32-exceptions/misc.t.

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