http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53868
Bug #: 53868 Summary: Temporary for indirect binding is not destroyed when destructor from initializer temp throws Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: hst...@ca.ibm.com Host: powerpc64-unknown-linux-gnu Target: powerpc64-unknown-linux-gnu The temporary created for indirect binding should be completely constructed (and from the output _it is_) before the destructors for temporaries in the initializer are called. In the following case, the destructor for a temporary in the initializer throws an int. During stack unwinding, it seems the temporary bound to the reference is missed. ### Self-contained source:> cat tempbindIndirect_inittempDtorThrows.cpp extern "C" int printf(const char *, ...); extern "C" void abort(); struct SubobjectInA { SubobjectInA(); ~SubobjectInA(); }; struct A : SubobjectInA { A() = delete; A(const A &) = delete; A(A &&) { } A(int); ~A(); }; #define TRACE_FUNC( ... ) \ { printf("%s\n", __PRETTY_FUNCTION__); __VA_ARGS__ } struct Q { Q() : q(0) TRACE_FUNC() ~Q(); int q; }; int main() { try { const A &a = Q().q; } catch (...) { return 0; } abort(); } SubobjectInA::SubobjectInA() TRACE_FUNC() SubobjectInA::~SubobjectInA() TRACE_FUNC() A::A(int) TRACE_FUNC() A::~A() TRACE_FUNC() Q::~Q() TRACE_FUNC( throw 0; ) ### Compiler invocation: g++-4.7.0 -std='c++11' tempbindIndirect_inittempDtorThrows.cpp -o test ### Compiler output: (return code 0) ### Output from resulting executable:> ./test ; echo rc=$? Q::Q() SubobjectInA::SubobjectInA() A::A(int) Q::~Q() rc=0 ### Expected output: Q::Q() SubobjectInA::SubobjectInA() A::A(int) Q::~Q() A::~A() SubobjectInA::~SubobjectInA() rc=0 ### gcc -v output:> g++-4.7.0 -v Using built-in specs. COLLECT_GCC=g++-4.7.0 COLLECT_LTO_WRAPPER=/data/gcc/libexec/gcc/powerpc64-unknown-linux-gnu/4.7.0/lto-wrapper Target: powerpc64-unknown-linux-gnu Configured with: ../gcc-4.7.0/configure --prefix=/data/gcc --program-suffix=-4.7.0 --disable-libssp --disable-libgcj --enable-version-specific-runtime-libs --with-cpu=default32 --enable-secureplt --with-long-double-128 --enable-shared --enable-__cxa_atexit --enable-threads=posix --enable-languages=c,c++,fortran --with-mpfr=/usr/local/ --with-mpc=/usr/local/ --with-gmp=/usr/local/ Thread model: posix gcc version 4.7.0 (GCC)