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Perl interpreter no longer crashes after using the PerlIO locale pragma
When a thread was spawned after using the PerlIO locale pragma, the Perl interpreter terminated unexpectedly with a segmentation fault. An upstream patch has been applied, which fixes PerlIO::encoding object duplication. As a result, threads are correctly created after setting a file handle encoding.
The bug is present in RHEL 6.9 as well.
Version-Release number of selected component (if applicable):
perl-5.10.1-143.el6
+++ This bug was initially created as a clone of Bug #1344749 +++
Description of problem:
perl segmentation fault when using PerlIO Layer :locale and threads
Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux Server release 7.2
How reproducible:
~~~~
[root@dhcp7-145 abhi]# perl
use open IO => ':locale';
use threads;
sub loop {for ($x = 1; $x < 1000000000000; $x++) {}}
$thr = threads->create(\&loop);
^d
Segmentation fault (core dumped)
~~~~
The script should not core dump but print a message like it does when run without the "open" pragma.
# perl
use threads;
sub loop {for ($x = 1; $x < 1000000000000; $x++) {}}
$thr = threads->create(\&loop);
^d
Perl exited with active threads:
1 running and unjoined
0 finished and unjoined
0 running and detached
Additional info:
1. the crash is in the PUSHSTACKi(PERLSI_MAGIC); expansion
2. looks like a very old bug :( http://www.gossamer-threads.com/lists/perl/porters/219693) and it appears to have been fixed in 2015, so maybe our perl is missing it
3. link to report is
~~~
https://rt.perl.org/Public/Bug/Display.html?id=44887
~~~
and link to patch is
~~~
https://rt.perl.org/Public/Ticket/Attachment/1362828/730066/0001-Properly-duplicate-PerlIO-encoding-objects.patch
~~~
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2017-0598.html