[Bug c/21213] New: segfault declaring a transparent union

["javier dot pello at urjc dot es" <gcc-bugzilla at gcc dot gnu dot org>]

Compiling the following piece of code causes gcc 3.4.3 and 3.4.4-20050422 to
segfault

    enum some_enum {
        enum_a
    };

    union some_union {
        enum some_enum;
    }  __attribute__((__transparent_union__));

The code is compiled as

    gcc -c test.c -o test.o

and gcc complains with

    test.c:6: warning: declaration does not declare anything
    test.c:7: 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.

Dump of gcc-3.4.3 -v follows:
Reading specs from /usr/lib/gcc/i686-pc-linux-gnu/3.4.3/specs
Configured with: ../gcc-3.4.3/configure --prefix=/usr --libexecdir=/usr/lib
--sharedstatedir=/var/lib --localstatedir=/var/lib --infodir=/usr/share/info
--mandir=/usr/share/man --with-arch=pentium4
Thread model: posix
gcc version 3.4.3

Dump of gcc-3.4.4 -v follows:
Using built-in specs.
Configured with: ../gcc-3.4-20050422/configure --prefix=/usr
Thread model: posix
gcc version 3.4.4 20050422 (prerelease)

-- 
           Summary: segfault declaring a transparent union
           Product: gcc
           Version: 3.4.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: javier dot pello at urjc dot es
                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=21213