Bug 90422 (IT_64547)
| Summary: | Perl dies with "panic: end_shift" errors | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 3 | Reporter: | Steevithak <steevithak> |
| Component: | perl | Assignee: | Warren Togami <wtogami> |
| Status: | CLOSED WONTFIX | QA Contact: | David Lawrence <dkl> |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 3.0 | CC: | bluth, david.r.steiner, dff, kreilly, laroche, rduran, tao |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-05-28 07:14:29 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Steevithak
2003-05-07 23:32:21 UTC
Found a workaround and won't have time to work on a test case for a while. But it does appear to be a bug in RedHat's build of Perl related to regular expressions and UTF-8. I'm not actually processing UTF-8 data in the first place but for some reason this build of Perl thinks everything is UTF-8. Anyway, I discovered that putting a "use bytes;" pragma at the begining of the code seem to turn off the defective UTF-8 stuff. Thanks for the workaround! This issue still exists in perl-5.8.0-88.4
on AS3.0. Here is a test case:
--------------------- begin ----------------
#!/usr/bin/perl -w
use File::Basename;
while (<STDIN>) {
chop;
$bname = basename ($_);
($dname = $_) =~ s/\/$bname$//;
print "d=$dname b=$bname\n";
}
------------------ end ----------------
This panics on input like "/asdffa/asfddsa/asfas.xx" and misbehaves on
input like "/asdfsa/asdfsf/sdfas".
-richard
removing the end-of-string "$" from s/// avoids the panic, but is not the desired behavior. -richard It's oviously related to UTF-8: (/tmp/test.pl is the above script) $ /tmp/test.pl /asdffa/asfddsa/asfas.xx panic: end_shift at /tmp/test.pl line 6, <STDIN> line 1. $ LANG=en_US /tmp/test.pl /asdffa/asfddsa/asfas.xx d=/asdffa/asfddsa b=asfas.xx So, (un-)setting LANG is a clean workaround to this? Cheers, Nick We are still seeing this bug in perl-5.8.0-89.10 on RHEL 3WS. The failure mode is the same for the test program in Comment #2 and using the "use:bytes" pragma is still a workaround. However, this is not being caused by the perl bug noted in the initial description. That patch was applied by perl-5.8.0-upstream-18197.patch. Thanks, -David- I forgot to include this in the last comment: We compiled perl 5.8.6 from perl.org on our target machine and it does not exhibit this behavior. Apparently, we are still missing a key patch. -David- I'll update this with some words from the maintainer: " utf8 issues in perl 5.8.0 are difficult to resolve without ending up breaking ABI. we've applied a number of patches to help and will investigate other options, but it is unlikely further changes can be made without significantly more divergence from upstream. " So, it is known that it is still a problem, and we would advise you to either "not do that", or use the Perl as shipped with RHEL4, as it doesn't exhibit those problems. Agreement from engineering is that this is infeasible to fix. Sorry. Your options are to upgrade perl yourself or use RHEL4. |