Invalid RTTI with Clang on macOS (Apple LLVM version 9.1.0 (clang-902.0.39.1))

app.cpp

#include <cstdio>
#include <stdexcept>

int main() {
  try {
    throw std::runtime_error("test");
  }
  catch (const std::exception& e) {
    // This catch block should be executed...
    std::printf("%s exception\n", e.what());
  }
  catch (const std::runtime_error& e) {
    // ...but instead we get this one when we link with "lib"
    std::printf("%s runtime_error\n", e.what());
  }
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.0)

add_library(lib lib.cpp)
add_executable(app app.cpp)
target_link_libraries(app lib)
target_compile_options(app PRIVATE -frtti)
target_compile_options(lib PRIVATE -fno-rtti)

invalid-output.txt

test runtime_error

lib.cpp

#include <memory>

void fun1() {
  // Comment this line and you will see the correct "test exception" output instead of "test runtime_error"
  std::__throw_bad_weak_ptr();
}

void fun2() {
}