[Bug c++/22604] New: "internal compiler error: Segmentation fault" with invalid nested classes

["flash at pobox dot com" <gcc-bugzilla at gcc dot gnu dot org>]

The invalid code below results in "internal compiler error: Segmentation fault" 
with a checking version of GCC 4.0.1.  Does not happen with GCC 3.3.4 or Apple GCC 4.0.0.
Like the code for bug 22603, this is a greatly-reduced and anonymized excerpt, found by Daniel 
Wilkerson's Delta, from a real PalmSource file.  (This reduction was found by looking for a segfault; the 
previous reduction looked for any compiler error.)  
    I don't think this is the same bug as my 22508, since that one also happened with Apple GCC 4.0.0.  
It doesn't sound to me like 21975 or 22441 either.


class NameOne;
class NameTwo : virtual public SAtom
{
 virtual NameOne* NameThree();
};
class NameFour : virtual public NameFive
{
class NameOne : public NameTwo
{
  virtual NameOne* NameThree();



======
Session:
125> /opt/gcc401chk/bin/g++ -v  /Projects/PlatformTools/compilerChain/tests/cpp/bugfiles/error/
BBinder_segfault.ii
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --enable-checking --prefix=/opt/gcc401chk --enable-languages=c,c+
+
Thread model: posix
gcc version 4.0.1
 /opt/gcc401chk/libexec/gcc/i686-pc-linux-gnu/4.0.1/cc1plus -fpreprocessed /Projects/
PlatformTools/compilerChain/tests/cpp/bugfiles/error/BBinder_segfault.ii -quiet -dumpbase 
BBinder_segfault.ii -mtune=pentiumpro -auxbase BBinder_segfault -version -o /tmp/ccuEkHiJ.s
GNU C++ version 4.0.1 (i686-pc-linux-gnu)
        compiled by GNU C version 3.3.4 (pre 3.3.5 20040809).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
/Projects/PlatformTools/compilerChain/tests/cpp/bugfiles/error/BBinder_segfault.ii:3: error: expected 
class-name before ?{? token
/Projects/PlatformTools/compilerChain/tests/cpp/bugfiles/error/BBinder_segfault.ii:7: error: expected 
class-name before ?{? token
/Projects/PlatformTools/compilerChain/tests/cpp/bugfiles/error/BBinder_segfault.ii:10: error: 
expected `}' at end of input
/Projects/PlatformTools/compilerChain/tests/cpp/bugfiles/error/BBinder_segfault.ii:10: error: invalid 
covariant return type for ?virtual NameFour::NameOne* NameFour::NameOne::NameThree()?
/Projects/PlatformTools/compilerChain/tests/cpp/bugfiles/error/BBinder_segfault.ii:4: error:   
overriding ?virtual NameOne* NameTwo::NameThree()?
/Projects/PlatformTools/compilerChain/tests/cpp/bugfiles/error/BBinder_segfault.ii:9: internal 
compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

Like bug 22603, this is tracked by PalmSouce bug 104911, though I suspect it's different.

-- 
           Summary: "internal compiler error: Segmentation fault" with
                    invalid nested classes
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: flash at pobox dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22604