Public bug reported:
Binary package hint: gcc-4.4
With this file as the only input:
==============
class A
{
A * get_a_pointer();
};
template <class T>
void function()
{
A::get_a_pointer().anything;
}
==============
The g++ crashes with this output:
==============
‘
crashy_test.cpp:9: confused by earlier errors, bailing out
Preprocessed source stored into /tmp/ccWR7fhP.out file, please attach this to
your bugreport.
==============
A box pops up with the message "Sorry, the program cc1plus closed
unexpectedly". Here is the preprocessed source it saved:
==============
// /usr/lib/gcc/x86_64-linux-gnu/4.4.1/cc1plus -quiet -D_GNU_SOURCE
crashy_test.cpp -D_FORTIFY_SOURCE=2 -quiet -dumpbase crashy_test.cpp
-mtune=generic -auxbase crashy_test -fstack-protector -o - -frandom-seed=0
# 1 "crashy_test.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "crashy_test.cpp"
class A
{
A * get_a_pointer();
};
template <class T>
void function()
{
A::get_a_pointer().anything;
}
==============
Other info:
It doesn't seem to matter that 'anything' doesn't exist. Replacing it with a
member (variable or function) that does exist doesn't make a difference.
You get a similar error even if you remove the last '}'.
This bug should be low priority, since it only occurs if your code has two
errors g++ should be reporting (in the second to last line):
-You cannot call A::get_a_pointer() without an object, and
-You cannot request members from the non-class type A*.
I don't mind it reporting one of these errors, then bailing out without
crashing.
The problem goes away if you make A::get_a_pointer static, or if you replace
the . with ->. It also goes away if you make function not a template function.
It can be reproduced if you make function a member function of a templated
class instead.
$ g++ -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.4.1-4ubuntu8'
--with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--enable-multiarch --enable-linker-build-id --with-system-zlib
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --enable-nls
--enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --disable-werror
--with-arch-32=i486 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu8)
$ apt-cache policy gcc-4.4
gcc-4.4:
Installed: 4.4.1-4ubuntu8
Candidate: 4.4.1-4ubuntu8
Version table:
*** 4.4.1-4ubuntu8 0
500 http://gb.archive.ubuntu.com karmic/main Packages
100 /var/lib/dpkg/status
$ uname -a
Linux ubuntu 2.6.31-16-generic #53-Ubuntu SMP Tue Dec 8 04:02:15 UTC 2009
x86_64 GNU/Linux
$ lsb_release -rd
Description: Ubuntu 9.10
Release: 9.10
** Affects: gcc-4.4 (Ubuntu)
Importance: Undecided
Status: New
--
templates with class and pointer error cause bailing out and crash
https://bugs.launchpad.net/bugs/503668
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