Seen using r143187 on Ubuntu Hardy on x86.

regehr@john-home:~/volatile/tmp116$ current-gcc -O0 -c small.c
small.c: In function ‘foo’:
small.c:1: error: non-trivial conversion in unary operation
long long unsigned int
long long int
iftmp.0 = -p_37.1;

small.c:1: error: non-trivial conversion in unary operation
long long unsigned int
long long int
iftmp.0 = -p_37;

small.c:1: internal compiler error: verify_gimple failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

regehr@john-home:~/volatile/tmp116$ cat small.c

unsigned long long foo (long long p_37)
{
  return -(unsigned long long) (p_37 ? : p_37);
}

regehr@john-home:~/volatile/tmp116$ current-gcc -v

Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --program-prefix=current- --enable-languages=c,c++ --prefix=/home/regehr : (reconfigured) ../configure --program-prefix=current- --enable-languages=c,c++ --prefix=/home/regehr : (reconfigured) ../configure --program-prefix=current- --enable-languages=c,c++ --prefix=/home/regehr : (reconfigured) ../configure --program-prefix=current- --prefix=/home/regehr --enable-languages=c,c++ --no-create --no-recursion : (reconfigured) ../configure --program-prefix=current- --prefix=/home/regehr --enable-languages=c,c++ --no-create --no-recursion : (reconfigured) ../configure --program-prefix=current- --prefix=/home/regehr --enable-languages=c,c++ --no-create --no-recursion : (reconfigured) ../configure --program-prefix=current- --prefix=/home/regehr --enable-languages=c,c++ --no-create --no-recursion : (reconfigured) ../configure --program-prefix=current- --prefix=/home/regehr --enable-languages=c,c++ --no-create --no-recursion
Thread model: posix
gcc version 4.4.0 20090108 (experimental) (GCC)