From duff@lighthouse.tamucc.edu

15​:42 <@​PerlJam> rakudo​: say "" ~~ /[]/
15​:42 < p6eval> rakudo eaa3ea​: OUTPUT«Statement not terminated properly at line 2, near "~~ /[]/"␤in Main (src/gen_setting.pm​:3340)␤»
15​:42 <@​PerlJam> rakudo​: say "" ~~ /[ ]/
15​:42 < p6eval> rakudo eaa3ea​: OUTPUT«Null PMC access in find_method()␤in Main (src/gen_setting.pm​:3340)␤»
15​:42 <@​PerlJam> That's just weird.
15​:42 <@​moritz_> PerlJam​: please open a ticket for the last one
15​:42 <@​moritz_> I'm sure that's wrong
15​:42 <@​moritz_> not entirely sure about the others
15​:43 <@​TimToady> std​: say "" ~~ /[]/
15​:43 < p6eval> std 27554​: OUTPUT«##### PARSE FAILED #####␤Unrecognized regex metacharacter at /tmp/BcDXBbF0TI line 1​:␤------> say "" ~~ /[]/␤ expecting ws␤FAILED 00​:04 36m␤»
15​:44 <@​TimToady> should have a better message

The above also holds for capturing groups.

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

From @moritz

21​:13 < moritz_> rakudo​: / | /; say "alive"
21​:13 <+p6eval> rakudo 689bb7​: OUTPUT«alive␤»
21​:13 < moritz_> std​: / | /
21​:13 <+p6eval> std 32092​: OUTPUT«===SORRY!===␤Null pattern not allowed
at /tmp/seCzwubd7Z line 1​:␤------> / | ⏏/␤ expecting
quantifier␤Parse failed␤FAILED 00​:01 115m␤»

From @bbkr

NOM

both cases still broken

bbkr​:nom bbkr$ ./perl6 -e 'say "" ~~ /[]/'
===SORRY!===
Unrecognized regex metacharacter (must be quoted to match literally) at
line 1, near "/"
bbkr​:nom bbkr$
bbkr​:nom bbkr$ ./perl6 -e 'say "" ~~ / | /'

(no output for this one)

From @diakopter

On Sun Sep 11 02​:09​:36 2011, bbkr wrote​:

NOM

both cases still broken

bbkr​:nom bbkr$ ./perl6 -e 'say "" ~~ /[]/'
===SORRY!===
Unrecognized regex metacharacter (must be quoted to match literally) at
line 1, near "/"
bbkr​:nom bbkr$
bbkr​:nom bbkr$ ./perl6 -e 'say "" ~~ / | /'

(no output for this one)

this has a much later duplicate ticket.

From @coke

On Sun Sep 11 02​:09​:36 2011, bbkr wrote​:

NOM

both cases still broken

bbkr​:nom bbkr$ ./perl6 -e 'say "" ~~ /[]/'
===SORRY!===
Unrecognized regex metacharacter (must be quoted to match literally) at
line 1, near "/"
bbkr​:nom bbkr$
bbkr​:nom bbkr$ ./perl6 -e 'say "" ~~ / | /'

(no output for this one)

Both of these now die with "Null regex not allowed" - Closable with tests.

--
Will "Coke" Coleda

From @moritz

On Sat Feb 22 17​:15​:34 2014, coke wrote​:

On Sun Sep 11 02​:09​:36 2011, bbkr wrote​:

NOM

both cases still broken

bbkr​:nom bbkr$ ./perl6 -e 'say "" ~~ /[]/'
===SORRY!===
Unrecognized regex metacharacter (must be quoted to match literally) at
line 1, near "/"
bbkr​:nom bbkr$
bbkr​:nom bbkr$ ./perl6 -e 'say "" ~~ / | /'

(no output for this one)

Both of these now die with "Null regex not allowed" - Closable with tests.

Now tested​:

commit 2582eed4dce4c012eb8d2501934e3720568fad8d
Author​: Moritz Lenz <mlenz@​noris.net>
Date​: Mon Feb 24 09​:31​:20 2014 +0100

  Tests for RT #​67554

diff --git a/S32-exceptions/misc.t b/S32-exceptions/misc.t
index 9aaef14..1dd6284 100644
--- a/S32-exceptions/misc.t
+++ b/S32-exceptions/misc.t
@@ -139,6 +139,9 @@ throws_like q[/ /], X::Syntax::Regex::NullRegex;
 throws_like q[/ a | /], X::Syntax::Regex::NullRegex;
 throws_like q[/ a || /], X::Syntax::Regex::NullRegex;
 throws_like q[/ a & /], X::Syntax::Regex::NullRegex;
+# RT 67554
+throws_like q{/ [] /}, X::Syntax::Regex::NullRegex;
+throws_like q{/ | /}, X::Syntax::Regex::NullRegex;
 
 
 throws_like 'sub f($a?, $b) { }', X::Parameter::WrongOrder,

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