Bug 68701
| Summary: | undef $ENV{'MPAGE'} causes mpage subproc to coredump | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Raw Hide | Reporter: | Jonathan Kamens <jik> |
| Component: | mpage | Assignee: | Tim Waugh <twaugh> |
| Status: | CLOSED RAWHIDE | QA Contact: | David Lawrence <dkl> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 1.0 | ||
| 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: | 2002-07-16 14:17:27 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: | |||
| Bug Depends On: | |||
| Bug Blocks: | 67218 | ||
The coredump is in mpage. Reproducible via:
MPAGE= mpage
The perl difference is "undef $ENV{BAZ}" makes an env variable called BAZ and
assigns undef to it, which, in a subshell, becomes the empty string.
If the coredump is in mpage, then the right thing to do is to change the component to mpage, not to close the bug, eh? Fixed package is mpage-2.5.2-4. Fix confirmed with mpage-2.5.2-4. |
With perl-5.8.0-31 and mpage-2.5.2-3, run this Perl script: ----- cut here ----- #!/usr/bin/perl undef $ENV{'MPAGE'}; if (! open(MPAGE, '|-')) { exec('mpage'); } close(MPAGE) || die; ----- cut here ----- If you change "undef $ENV{'MPAGE'}" to "delete $ENV{'MPAGE'}", the coredump goes away. I realize that it is correct to use "delete" and incorrect to use "undef", but I don't think this behavior is reasonable, especially since it worked just fine in perl 5.6.1.