From @masak

On Rakudo 679e480 and Parrot r38094, the following happens when one
tries to execute a 'use' statement within a class body​:

$ perl6 -e 'class A; use Test'
Null PMC access in set_pmc_keyed()
[...]

Semicolon or block syntax on the class decl ist egal. So is using
'module', 'package' or 'grammar'.

From @kyleha

This is an automatically generated mail to inform you that tests are now available in t/spec/S10-packages/basic.t

commit f8866a9b95a6789d0692b1018a771d35e7ff35ef
Author​: kyle <kyle@​c213334d-75ef-0310-aa23-eaa082d1ae64>
Date​: Thu Jul 30 19​:22​:33 2009 +0000

  [t/spec] Tests for RT #​64688
 
  git-svn-id​: http://svn.pugscode.org/pugs@&#8203;27820 c213334d-75ef-0310-aa23-eaa082d1ae64

diff --git a/t/spec/S10-packages/basic.t b/t/spec/S10-packages/basic.t
index 44c2c4e..9fe31ed 100644
--- a/t/spec/S10-packages/basic.t
+++ b/t/spec/S10-packages/basic.t
@@ -4,7 +4,7 @@ use v6;
 
 use Test;
 
-plan 22;
+plan 32;
 
 regex fairly_conclusive_platform_error {:i ^\N*<<Null?>>}
 
@@ -146,4 +146,18 @@ eval_lives_ok q' module MapTester { (1, 2, 3).map: { $_ } } ',
        'array initialization works fine in imported subs';
 }
 
+#?rakudo todo 'RT #64688'
+{
+    eval_lives_ok 'class RT64688_c1;use Test', 'use after class line';
+    eval_lives_ok 'class RT64688_c1 { use Test }', 'use in class block';
+    eval_lives_ok 'module RT64688_m1;use Test', 'use after module line';
+    eval_lives_ok 'module RT64688_m2 { use Test }', 'use in module block';
+    eval_lives_ok 'package RT64688_p1;use Test', 'use after package line';
+    eval_lives_ok 'package RT64688_p2 { use Test }', 'use in package block';
+    eval_lives_ok 'grammar RT64688_g1;use Test', 'use after grammar line';
+    eval_lives_ok 'grammar RT64688_g2 { use Test }', 'use in grammar block';
+    eval_lives_ok 'role RT64688_r1;use Test', 'use after role line';
+    eval_lives_ok 'role RT64688_r2 { use Test }', 'use in role block';
+}
+
 # vim: ft=perl6

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

From @carbin

Easiest way to do this​:

class Foo { use Test; }
Null PMC access in set_pmc_keyed()
in Main (src/gen_setting.pm​:444)

Real way to do this​:

$ perl6 test.pl
Null PMC access in set_pmc_keyed()
in Main (src/gen_setting.pm​:444)
$ cat test.pl
use Foo;
$ cat Foo.pm
class Foo {
use Bar;
}
$ cat Bar.pm
class Bar {
method baz is export {}
}

Putting the 'use' declaration outside of the class works as a work-around.

--
Carlin

From philipp@marek.priv.at

Using the two attached files, and doing

  perl6 -e 'use W'

gives me a Null PMC access.

Without "is export" it's gone, but of course the function isn't exported.

--
Versioning your /etc, /home or even your whole installation?
  Try fsvs (fsvs.tigris.org)!

From philipp@marek.priv.at

S.pm

From philipp@marek.priv.at

W.pm

From @ShimmerFairy

None of these problems return a Null PMC access anymore. However, the
ones that involve the export keyord ("module baz is export", for
example) return a "Can't handle scope declarator on modules yet" error.

The posted additions to t/spec/S10-packages/basic.t pass (although the
additions had to be run manually due to unrelated problems with the test
file). This bug is resolved.
--
Don't Panic!

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