c++/5817: Duplicate typedef causes ICE (gcc 3.0 regression)

[Peter Schmid <schmid at snake dot iap dot physik dot tu-darmstadt dot de>]

>Number:         5817
>Category:       c++
>Synopsis:       Duplicate typedef causes ICE (gcc 3.0 regression)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-illegal-code
>Submitter-Id:   net
>Arrival-Date:   Sun Mar 03 08:56:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Peter Schmid
>Release:        3.1 20020302 (prerelease)
>Organization:
TU Darmstadt
>Environment:
System: Linux kiste 2.4.17 #7 Thu Jan 3 17:21:51 CET 2002 i686 unknown
Architecture: i686
SuSE 7.3
glibc 2.2.4 + patches
GNU ld version 2.11.93.0.2 20020207
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads --enable-languages=c,c++,f77,objc
>Description:
The following illegal source r.C causes an ICE. This is an regression
wrt. gcc 2.95.2 and gcc 3.0.
>How-To-Repeat:
source code r.C
template <class T, class C = less<_Key>>
struct A
{
  typedef T a;
  typedef T b;
};

g++ -v -c r.C -W -Wall -save-temps
Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/specs
Configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads --enable-languages=c,c++,f77,objc
Thread model: posix
gcc version 3.1 20020302 (prerelease)
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/cpp0 -lang-c++ -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -v -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ r.C -W -Wall r.ii
GNU CPP version 3.1 20020302 (prerelease) (cpplib) (i386 Linux/ELF)
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include/g++-v3
 /usr/local/include/g++-v3/i686-pc-linux-gnu
 /usr/local/include/g++-v3/backward
 /usr/local/include
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/include
 /usr/include
End of search list.
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/cc1plus -fpreprocessed r.ii -quiet -dumpbase r.C -W -Wall -version -o r.s
GNU CPP version 3.1 20020302 (prerelease) (cpplib) (i386 Linux/ELF)
GNU C++ version 3.1 20020302 (prerelease) (i686-pc-linux-gnu)
	compiled by GNU C version 3.1 20020302 (prerelease).
r.C:1: parse error before `<' token
r.C:5: template declaration of `typedef T b'
r.C:5: internal error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.

preprocessed source code r.ii
# 1 "r.C"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "r.C"
template <class T, class C = less<_Key>>
struct A
{
  typedef T a;
  typedef T b;
};
>Fix:
	
>Release-Note:
>Audit-Trail:
>Unformatted: