[Bug c++/60379] New: [4.9 Regression] pugixml build failure caused by r207001

["trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60379

            Bug ID: 60379
           Summary: [4.9 Regression] pugixml build failure caused by
                    r207001
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
                CC: jason at gcc dot gnu.org

/usr/bin/g++  -flto=4 -march=native -O2 -Dpugixml_EXPORTS  -DNDEBUG
-march=native -O2 -pipe  -fPIC   -o
CMakeFiles/pugixml.dir/var/tmp/portage/dev-libs/pugixml-1.4/work/pugix
ml-1.4/src/pugixml.cpp.o -c
/var/tmp/portage/dev-libs/pugixml-1.4/work/pugixml-1.4/src/pugixml.cpp
/var/tmp/portage/dev-libs/pugixml-1.4/work/pugixml-1.4/src/pugixml.cpp: In
static member function âstatic typename Traits::value_type
pugi::impl::{anonymous}::utf_decoder<Tra
its, opt_swap>::decode_utf8_block(const uint8_t*, size_t, typename
Traits::value_type)â:
/var/tmp/portage/dev-libs/pugixml-1.4/work/pugixml-1.4/src/pugixml.cpp:892:90:
error: a cast to a type other than an integral or enumeration type cannot
appear in a constant-
expression
       while (size >= 4 && (*static_cast<const uint32_t*>(static_cast<const
void*>(data)) & 0x80808080) == 0)


markus@x4 tmp % cat test.ii
template <int> struct A {
  void m_fn1(int p1) {
    int *a;
    while (p1 && *static_cast<int *>(static_cast<void *>(a)))
      ;
  }
};

markus@x4 tmp % g++ -c test.ii
test.ii: In member function âvoid A<<anonymous> >::m_fn1(int)â:
test.ii:4:15: error: a cast to a type other than an integral or enumeration
type cannot appear in a constant-expression
     while (p1 && *static_cast<int *>(static_cast<void *>(a)))
               ^

Started with r207001.