'is cached' routines break when precompiled

p6rt commented 9 years ago

Migrated from rt.perl.org#122896 (status was 'open')

Searchable as RT122896$

p6rt commented 9 years ago

From @raydiak

Create a module M containing "module M { sub f () is cached is export { } }". When precompiled, the following error occurs when f() is called:

Cannot invoke null object in block at src/gen/m-CORE.setting:3604 in any enter at src/gen/m-Metamodel.nqp:3110 in method invoke at src/gen/m-CORE.setting:3548

This is perl6 version 2014.09-81-g89abcf2 built on MoarVM version 2014.09-12-gb9e24ee

p6rt commented 9 years ago

From @dwarring

Test case has been added to S10-packages/precompilation.t. Fudged for jvm and moar.

On Fri Oct 03 17:41:15 2014, raydiak@cyberuniverses.com wrote:

Create a module M containing "module M { sub f () is cached is export { } }". When precompiled, the following error occurs when f() is called:

Cannot invoke null object in block at src/gen/m-CORE.setting:3604 in any enter at src/gen/m-Metamodel.nqp:3110 in method invoke at src/gen/m-CORE.setting:3548

This is perl6 version 2014.09-81-g89abcf2 built on MoarVM version 2014.09-12-gb9e24ee

p6rt commented 9 years ago

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

p6rt commented 9 years ago

From @lizmat

On 04 Oct 2014, at 02:41, (via RT) \perl6\-bugs\-followup@perl\.org wrote:

# New Ticket Created by
# Please include the string: [perl #122896] # in the subject line of all future correspondence about this issue. # \<URL: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=122896 >

Create a module M containing "module M { sub f () is cached is export { } }". When precompiled, the following error occurs when f() is called:

Cannot invoke null object in block at src/gen/m-CORE.setting:3604 in any enter at src/gen/m-Metamodel.nqp:3110 in method invoke at src/gen/m-CORE.setting:3548

This is perl6 version 2014.09-81-g89abcf2 built on MoarVM version 2014.09-12-gb9e24ee

At least on OS X, this has now changed to a segfault on Moar, easily reproducible thus:

$ perl6 -e 'CompUnit.new("t/spec/packages/Example/C.pm").precomp’ $ perl6 -It/spec/packages -e ‘use Example::C; f()’ Segmentation fault: 11

Liz

p6rt commented 9 years ago

From @bdw

Which backend is that? I'm assuming moar.

2015-01-08 10:14 GMT+01:00 Elizabeth Mattijsen \liz@dijkmat\.nl:

On 04 Oct 2014, at 02:41, (via RT) \perl6\-bugs\-followup@perl\.org wrote:

# New Ticket Created by # Please include the string: [perl #122896] # in the subject line of all future correspondence about this issue. # \<URL: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=122896 >

Create a module M containing "module M { sub f () is cached is export { } }". When precompiled, the following error occurs when f() is called:

Cannot invoke null object in block at src/gen/m-CORE.setting:3604 in any enter at src/gen/m-Metamodel.nqp:3110 in method invoke at src/gen/m-CORE.setting:3548

This is perl6 version 2014.09-81-g89abcf2 built on MoarVM version 2014.09-12-gb9e24ee

At least on OS X, this has now changed to a segfault on Moar, easily reproducible thus:

$ perl6 -e 'CompUnit.new("t/spec/packages/Example/C.pm").precomp’ $ perl6 -It/spec/packages -e ‘use Example::C; f()’ Segmentation fault: 11

Liz

p6rt commented 9 years ago

From @lizmat

Moar :-)

On 08 Jan 2015, at 10:16, Bart Wiegmans \bartwiegmans@gmail\.com wrote:

Which backend is that? I'm assuming moar.

2015-01-08 10:14 GMT+01:00 Elizabeth Mattijsen \liz@dijkmat\.nl:

On 04 Oct 2014, at 02:41, (via RT) \perl6\-bugs\-followup@perl\.org wrote:

# New Ticket Created by # Please include the string: [perl #122896] # in the subject line of all future correspondence about this issue. # \<URL: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=122896 >

Create a module M containing "module M { sub f () is cached is export { } }". When precompiled, the following error occurs when f() is called:

Cannot invoke null object in block at src/gen/m-CORE.setting:3604 in any enter at src/gen/m-Metamodel.nqp:3110 in method invoke at src/gen/m-CORE.setting:3548

This is perl6 version 2014.09-81-g89abcf2 built on MoarVM version 2014.09-12-gb9e24ee

At least on OS X, this has now changed to a segfault on Moar, easily reproducible thus:

$ perl6 -e 'CompUnit.new("t/spec/packages/Example/C.pm").precomp’ $ perl6 -It/spec/packages -e ‘use Example::C; f()’ Segmentation fault: 11

Liz

p6rt commented 9 years ago

From @lizmat

On 08 Jan 2015, at 10:16, Bart Wiegmans \bartwiegmans@gmail\.com wrote:

Which backend is that? I'm assuming moar.

2015-01-08 10:14 GMT+01:00 Elizabeth Mattijsen \liz@dijkmat\.nl:

On 04 Oct 2014, at 02:41, (via RT) \perl6\-bugs\-followup@perl\.org wrote:

# New Ticket Created by # Please include the string: [perl #122896] # in the subject line of all future correspondence about this issue. # \<URL: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=122896 >

Create a module M containing "module M { sub f () is cached is export { } }". When precompiled, the following error occurs when f() is called:

Cannot invoke null object in block at src/gen/m-CORE.setting:3604 in any enter at src/gen/m-Metamodel.nqp:3110 in method invoke at src/gen/m-CORE.setting:3548

This is perl6 version 2014.09-81-g89abcf2 built on MoarVM version 2014.09-12-gb9e24ee

At least on OS X, this has now changed to a segfault on Moar, easily reproducible thus:

$ perl6 -e 'CompUnit.new("t/spec/packages/Example/C.pm").precomp’ $ perl6 -It/spec/packages -e ‘use Example::C; f()’ Segmentation fault: 11

I further golfed this down to:

multi sub trait_mod:\(Routine $r, :$foo!) { $r.wrap(-> |c { }); } sub a is foo { say "a" }; a

Put this in a file with a .pm extension, precomp it like above, and try to load it.

Liz

p6rt commented 9 years ago

From @lizmat

On 08 Jan 2015, at 13:36, Elizabeth Mattijsen \liz@dijkmat\.nl wrote: I further golfed this down to:

multi sub trait_mod:\(Routine $r, :$foo!) { $r.wrap(-> |c { }); } sub a is foo { say "a" }; a

Put this in a file with a .pm extension, precomp it like above, and try to load it.

By making the block completely parameterless, it gives a stack trace

Cannot invoke null object at A.pm:2 (/Users/liz/Github/rakudo.moar/A.pm.moarvm::17) from src/gen/m-Metamodel.nqp:3185 (blib/Perl6/Metamodel.moarvm:enter:28)

that brings us to:

src/Perl6/Metamodel/Dispatchers.nqp

line 101:

method enter(*@pos, *%named) { my $fresh := nqp::clone(self); my $first := self.candidates[0]; nqp::setdispatcher($fresh); $first(|@pos, |%named) # \<— $first is not set }

So it would appear that we cannot find a candidate to be dispatched to. Perhaps the original sub is not serialized???

Liz

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