Bug 511156

Summary:	sys-devel/gdb-7.7* crashes on a C++ mangled symbol
Product:	Gentoo Linux	Reporter:	Georg Rudoy <0xd34df00d>
Component:	[OLD] Core system	Assignee:	Gentoo Toolchain Maintainers <toolchain>
Status:	RESOLVED UPSTREAM
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://sourceware.org/bugzilla/show_bug.cgi?id=16957
See Also:	https://sourceware.org/bugzilla/show_bug.cgi?id=16957
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	Somewhat minimal reproducing example.

Description Georg Rudoy 2014-05-23 23:49:02 UTC

gdb's demangler enters infinite recursion and crashes as the result on the following C++ symbol:
_Z7ZipWithI7QStringS0_5QListZN4oral6detail16AdaptCreateTableI7AccountEES0_RKNS3_16CachedFieldsDataEEUlRKS0_SA_E_ET1_IDTclfp1_cvT__EcvT0__EEEERKT1_ISC_ERKT1_ISD_ET2_

The bug is already reported and confirmed to gdb's bugzilla: https://sourceware.org/bugzilla/show_bug.cgi?id=16957

Reproducible: Always

Steps to Reproduce:
1. Build attached example, g++ build line (Qt4 core and sql are required):
g++ -std=c++11 -I /usr/include/qt4/ -I /usr/include/qt4/QtCore/ -I /usr/include/qt4/QtSql/ -L/usr/lib/qt4 -lQtCore -lQtSql -O0 -g -ggdb main.cpp -o main

2. Try running gdb ./main
Actual Results:  
Crashed gdb.

Expected Results:  
gdb ready to rock!

Comment 1 Georg Rudoy 2014-05-23 23:49:53 UTC

Created attachment 377542 [details]
Somewhat minimal reproducing example.

Comment 2 SpanKY gentoo-dev

2014-05-24 23:58:16 UTC

well, if it ever gets fixed upstream, we'll include the fix in our patchset