Bug 2211507

Summary:	dynamic_cast() is failing
Product:	Red Hat Enterprise Linux 8	Reporter:	Paulo Andrade <pandrade>
Component:	gcc-toolset-11-gcc	Assignee:	Marek Polacek <mpolacek>
Status:	CLOSED WONTFIX	QA Contact:	qe-baseos-tools-bugs
Severity:	medium	Docs Contact:
Priority:	medium
Version:	8.7	CC:	ahajkova, fweimer, jakub, ohudlick, sipoyare
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2023-06-05 16:08:37 UTC	Type:	Bug
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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 20:12:26 UTC

This bug was initially created as a copy of Bug #2211506

I am copying this bug because: 



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 16:08:37 UTC

While GCC Toolset 11 is still supported, the fix is for libstdc++.so.6, which is not included in the toolset.
The fix will happen to be included in the next update of the system GCC in RHEL 9 (but currently I have no
plans to rebuild the system gcc in RHEL8).

Comment 2 Marek Polacek 2023-06-13 21:36:38 UTC

*** Bug 2211509 has been marked as a duplicate of this bug. ***