ccache clang \
                -O2 -g -fno-inline-functions -fthreadsafe-statics -Wnon-virtual-dtor -Werror -Wignored-qualifiers -Wformat -Wswitch -O3 -g0 -march=native -DNO_UPLOAD_STATS -Qunused-arguments -Wno-logical-op-parentheses -pipe  -D_GNU_SOURCE=1 -D_REENTRANT -I/usr/include/SDL -I/usr/include/libdrm -I/usr/include/GL -I/usr/include/libpng12   -DIMPLEMENT_SAVE_PNG \
                -c src/custom_object_dialog.cpp
In file included from src/custom_object.cpp:1:
src/custom_object.cpp:4442:15: error: comparison of unsigned expression < 0 is always false [-Werror,-Wtautological-compare]
 if((segment) < (0)) { std::ostringstream s; s << "src/custom_object.cpp" << ":" << 4442 << " ASSERT GE FAILED: " << "segment" << " < " << "0" << ": " << (segment) << " < " << (0) << "\n"; if(throw_validation_failure_on_assert()) { throw validation_failure_exception(s.str()); } else { std::cerr << s.str(); output_backtrace(); report_assert_msg(s.str()); abort(); } };
    ~~~~~~~~~ ^ ~~~
src/custom_object.cpp:4465:15: error: comparison of unsigned expression < 0 is always false [-Werror,-Wtautological-compare]
 if((segment) < (0)) { std::ostringstream s; s << "src/custom_object.cpp" << ":" << 4465 << " ASSERT GE FAILED: " << "segment" << " < " << "0" << ": " << (segment) << " < " << (0) << "\n"; if(throw_validation_failure_on_assert()) { throw validation_failure_exception(s.str()); } else { std::cerr << s.str(); output_backtrace(); report_assert_msg(s.str()); abort(); } };
    ~~~~~~~~~ ^ ~~~
2 errors generated.
make: *** [custom_object.o] Error 1
make: *** Waiting for unfinished jobs....
In file included from src/custom_object_dialog.cpp:1:
src/custom_object_dialog.cpp:549:11: error: comparison of unsigned expression < 0 is always false [-Werror,-Wtautological-compare]
 if(index < 0 || index >= choices.size()) {
    ~~~~~ ^ ~
1 error generated.
make: *** [custom_object_dialog.o] Error 1