Bug #125918 for Devel-MAT: Preserved localised values are not identifiable

Tue Jul 24 15:00:19 2018 leonerd-cpan [...] leonerd.org.uk - Ticket created

Subject:

Preserved localised values are not identifiable

The preserved value of a `local` statement is captured somewhere on the heap, but not in a way any identification can see it: Given: eval: our $FOO = "outer value"; { local $FOO = "inner value"; Devel::MAT::Dumper::dump("inside.pmat"); } We find Show quoted text

pmat> find pv "inner"

SCALAR(PV) at 0x55bbaf9aef90: "inner value" Show quoted text

pmat> identify 0x55bbaf9aef90

SCALAR(PV) at 0x55bbaf9aef90 is: └─the symbol '$Lexical::Persistence::FOO' But yet Show quoted text

pmat> find pv "outer value"

SCALAR(PV) at 0x55bbafa22be8: "outer value" Show quoted text

pmat> identify 0x55bbafa22be8

SCALAR(PV) at 0x55bbafa22be8 is: └─not found -- Paul Evans

Tue Jul 24 17:10:49 2018 leonerd-cpan [...] leonerd.org.uk - Correspondence added

Thinking about it, I expect this will require more Dumper support to walk the savestack looking for these entries - experience gained during writing similar code in Future::AsyncAwait might be helpful here. -- Paul Evans

Mon Aug 13 12:49:20 2018 leonerd-cpan [...] leonerd.org.uk - Correspondence added

Latest bzr source now has support, at least on perl5.18 onwards. Show quoted text

pmat> identify 0x55aed5d1d070

SCALAR(PV) at 0x55aed5d1d070 is: └─[inferred] saved value of SCALAR slot of GLOB($*) at 0x55aed5ca9720, which is: └─the glob '*Lexical::Persistence::FOO" -- Paul Evans

Mon Jan 14 18:19:30 2019 leonerd-cpan [...] leonerd.org.uk - Correspondence added

On Mon Aug 13 12:49:20 2018, PEVANS wrote: Show quoted text

> Latest bzr source now has support, at least on perl5.18 onwards. >

> pmat> identify 0x55aed5d1d070

> SCALAR(PV) at 0x55aed5d1d070 is: > └─[inferred] saved value of SCALAR slot of GLOB($*) at 0x55aed5ca9720, > which is: > └─the glob '*Lexical::Persistence::FOO"

Now released with D-M 0.41 + D-M-D 0.38 -- Paul Evans

Mon Jan 14 18:19:30 2019 leonerd-cpan [...] leonerd.org.uk - Fixed in 0.41 added

Mon Jan 14 18:19:54 2019 leonerd-cpan [...] leonerd.org.uk - Status changed from 'new' to 'resolved'