https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80534
--- Comment #1 from Freddie Chopin <freddie_chopin at op dot pl> --- Created attachment 41276 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41276&action=edit preprocessed source which causes the problem - minimal version OK, I've managed to narrow it down to a much smaller test case: -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- $ cat ice.cpp #include <memory> using Storage = std::aligned_storage<sizeof(int)>::type; using StorageUniquePointer = std::unique_ptr<Storage[]>; StorageUniquePointer storageUniquePointer_ {new Storage[1]}; $ arm-none-eabi-g++ -c ice.cpp In file included from /home/freddie/bleeding-edge-toolchain/arm-none-eabi-gcc-7.0.1-RC-20170425-170426/arm-none-eabi-gcc-7.0.1-RC-20170425-170426/arm-none-eabi/include/c++/7.0.1/memory:80:0, from ice.cpp:1: /home/freddie/bleeding-edge-toolchain/arm-none-eabi-gcc-7.0.1-RC-20170425-170426/arm-none-eabi-gcc-7.0.1-RC-20170425-170426/arm-none-eabi/include/c++/7.0.1/bits/unique_ptr.h: In instantiation of 'class std::unique_ptr<std::aligned_storage<4>::type [], std::default_delete<std::aligned_storage<4>::type []> >': /home/freddie/bleeding-edge-toolchain/arm-none-eabi-gcc-7.0.1-RC-20170425-170426/arm-none-eabi-gcc-7.0.1-RC-20170425-170426/arm-none-eabi/include/c++/7.0.1/bits/unique_ptr.h:470:2: required from 'std::unique_ptr<_Tp [], _Dp>::unique_ptr(_Up) [with _Up = std::aligned_storage<4>::type*; _Vp = std::default_delete<std::aligned_storage<4>::type []>; <template-parameter-2-3> = void; <template-parameter-2-4> = bool; _Tp = std::aligned_storage<4>::type; _Dp = std::default_delete<std::aligned_storage<4>::type []>]' ice.cpp:5:59: required from here /home/freddie/bleeding-edge-toolchain/arm-none-eabi-gcc-7.0.1-RC-20170425-170426/arm-none-eabi-gcc-7.0.1-RC-20170425-170426/arm-none-eabi/include/c++/7.0.1/bits/unique_ptr.h:398:5: internal compiler error: in finish_member_declaration, at cp/semantics.c:2963 { ^ Please submit a full bug report, with preprocessed source if appropriate. See <https://gcc.gnu.org/bugs/> for instructions. $ -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- I'm attaching preprocessed source again. The problem goes away in these situations: - not using array as the type of std::unique_ptr; - using anything "simple" as the "Storage" type (for example just an "int") instead of std::aligned_storage; - not initializing the object or initializing it with nullptr;
