more OS X build problems

Hello,

I just checked out out the most recent Mozilla trunk from CVS and
followed the build instructions on the Mozilla website. During the
compilation, I ran into the error below. Are there any steps I'm
missing or is the problem with the actual code?

c++ -o nsStandardURL.o -c  -DMOZILLA_INTERNAL_API
-DOSTYPE=\"Darwin8.1.0\" -DOSARCH=\"Darwin\" -DBUILD_ID=0000000000
-DIMPL_NS_NET  -I../../../dist/include/xpcom
-I../../../dist/include/string -I../../../dist/include/mimetype
-I../../../dist/include/uconv -I../../../dist/include/locale
-I../../../dist/include/pref -I../../../dist/include/necko
-I../../../dist/include -I../../../dist/include/nspr
-I../../../dist/sdk/include    -mdynamic-no-pic   -fno-rtti
-fno-exceptions -Wall -Wconversion -Wpointer-arith -Wcast-align
-Woverloaded-virtual -Wsynth -Wno-ctor-dtor-privacy
-Wno-non-virtual-dtor -Wno-long-long -fpascal-strings -no-cpp-precomp
-fno-common -fshort-wchar -I/Developer/Headers/FlatCarbon -pipe
-DNDEBUG -DTRIMMED -O   -DMOZILLA_CLIENT -include
../../../mozilla-config.h -Wp,-MD,.deps/nsStandardURL.pp
nsStandardURL.cpp
nsStandardURL.cpp: In member function `nsresult
nsStandardURL::BuildNormalizedSpec(const char*)':
../../../dist/include/string/nsTSubstring.h:502: error:
'nsCSubstring::nsCSubstring(const nsCSubstring&)' is protected
nsStandardURL.cpp:497: error: within this context
../../../dist/include/string/nsTSubstring.h:502: error:
'nsCSubstring::nsCSubstring(const nsCSubstring&)' is protected
nsStandardURL.cpp:497: error: within this context
make[4]: *** [nsStandardURL.o] Error 1
make[3]: *** [libs] Error 2
make[2]: *** [libs] Error 2
make[1]: *** [tier_9] Error 2
make: *** [default] Error 2