https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67054
Bug ID: 67054 Summary: Constructor inheritance with non-default constructible members Product: gcc Version: 5.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: alltaken380 at gmail dot com Target Milestone: --- Created attachment 36086 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36086&action=edit Preprocessed source code Following code won't compile: struct NonDefault { NonDefault(int) {} }; struct Base { Base(int) {} }; struct Derived : public Base { NonDefault foo = 4; using Base::Base; }; auto test() { auto d = Derived{ 5 }; } $ g++ -std=c++14 -c test.cpp test.cpp: In function ‘auto test()’: test.cpp:20:25: error: use of deleted function ‘Derived::Derived(int)’ auto d = Derived{ 5 }; ^ test.cpp:15:17: note: ‘Derived::Derived(int)’ is implicitly deleted because the default definition would be ill-formed: using Base::Base; ^ test.cpp:15:17: error: no matching function for call to ‘NonDefault::NonDefault()’ test.cpp:3:5: note: candidate: NonDefault::NonDefault(int) NonDefault(int) {} ^ test.cpp:3:5: note: candidate expects 1 argument, 0 provided test.cpp:1:8: note: candidate: constexpr NonDefault::NonDefault(const NonDefault&) struct NonDefault ^ test.cpp:1:8: note: candidate expects 1 argument, 0 provided test.cpp:1:8: note: candidate: constexpr NonDefault::NonDefault(NonDefault&&) test.cpp:1:8: note: candidate expects 1 argument, 0 provided $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: /build/gcc-multilib/src/gcc-5.2.0/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --enable-libmpx --with-system-zlib --with-isl --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --enable-gnu-indirect-function --enable-multilib --disable-werror --enable-checking=release --with-default-libstdcxx-abi=gcc4-compatible Thread model: posix gcc version 5.2.0 (GCC)