Bug 2211506

Summary: dynamic_cast() is failing
Product: Red Hat Enterprise Linux 8 Reporter: Paulo Andrade <pandrade>
Component: gccAssignee: Marek Polacek <mpolacek>
gcc sub component: system-version QA Contact: Václav Kadlčík <vkadlcik>
Status: CLOSED ERRATA Docs Contact:
Severity: medium    
Priority: medium CC: ahajkova, fweimer, jakub, ohudlick, sipoyare, vkadlcik
Version: 8.7Keywords: Bugfix, Reopened, Triaged
Target Milestone: rcFlags: pm-rhel: mirror+
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: gcc-8.5.0-20.el8 Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2023-11-14 15:48:38 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Paulo Andrade 2023-05-31 20:10:49 UTC 
User is experiencing the issue in upstream bug report
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99074
[gcc 8 and above is crashing with dynamic_cast<>() on null pointer with optimization level -O1 and above]
and would like a backport for gcc-toolset-9-gcc-9.2* as it is being used
for their product.

While it is agreed it is UB, previous source code relied on this working.
Comment 1 Marek Polacek 2023-06-05 16:09:21 UTC 
Like <https://bugzilla.redhat.com/show_bug.cgi?id=2211507#c1>, except that GTS 9 is not supported anymore.
Comment 2 Marek Polacek 2023-06-14 11:48:18 UTC 
Reopening.  Since I'm updating RHEL 8 gcc for a different BZ, I might as well squeeze in this trivial fix.
Comment 9 errata-xmlrpc 2023-11-14 15:48:38 UTC 
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 (gcc bug fix and enhancement update), 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://access.redhat.com/errata/RHEA-2023:7099