Reported as RT 130361

The perl debugger is not stopping at postponed breakpoints in a perl 5.20.2 that we've built from source on CPAN.

I'm not sure where to begin debugging the issue. I've examined the perldoc for perldebug and perldebguts, and grepped through the perldelta's in our build and haven't found anything (though I barely understand a lot of perldebguts).

It was suggested to me via "Chatterbox" that 1163165 is related, but I don't follow how. 

% < perl5.20.2 > -dwe0 

main::(-e:1):    0 
  DB<1> b File::Temp->new 
Subroutine File::Temp not found. 

  DB<2> b postpone File::Temp::new 
  DB<3> use File::Temp 
  DB<4> x File::Temp->new 
0  File::Temp=GLOB(0x283db48) 
   -> *File::Temp::$fh 
         FileHandle({*File::Temp::$fh}) => fileno(3)

[download]
UNEXPECTEDLY did not stop at File::Temp::new 

  DB<5> b postpone File::Temp::new 
  DB<6> x File::Temp->new 
0  File::Temp=GLOB(0x216aa78) 
   -> *File::Temp::$fh 
         FileHandle({*File::Temp::$fh}) => fileno(3)

[download]
UNEXPECTEDLY did not stop at File::Temp::new 

  DB<7> B * 
Deleting all breakpoints... 
  DB<8> b postpone File::Temp::new 
  DB<9> x File::Temp->new 
0  File::Temp=GLOB(0x216abc8) 
   -> *File::Temp::$fh 
         FileHandle({*File::Temp::$fh}) => fileno(3)

[download]
UNEXPECTEDLY did not stop at File::Temp::new 

  DB<10> b File::Temp::new 
  DB<11> x File::Temp->new 
File::Temp::new(/.../lib/5.20.2/File/Temp.pm:885): 
885:      my $proto = shift; 
  DB<<12>> c 
0  File::Temp=GLOB(0x216aeb0) 
   -> *File::Temp::$fh 
         FileHandle({*File::Temp::$fh}) => fileno(3)

[download]
STOPPED at File::Temp::new as EXPECTED

Update

I'm not sure why it didn't occur to me before, but we have local perl installations (that we don't use) that come with our Linux machines. The local install of perl 5.20.2 has the same issue. I'm going to report this as a bug.

Update 2

Reported as https://rt.perl.org/Ticket/Display.html?id=130361

In reply to debugger is not stopping at postponed breakpoints by jkahrman

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