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The std::emit_on_flush manipulator depends on dynamic_cast, so fails without RTTI. The std::async code can't catch a forced_unwind exception when RTTI is disabled, so it can't rethrow it either, and the test aborts. libstdc++-v3/ChangeLog: * testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail if -fno-rtti is used. * testsuite/30_threads/async/forced_unwind.cc: Expect test to abort if -fno-rtti is used.
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