https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82148
Bug ID: 82148 Summary: ICE in assign_temp, at function.c:968 Product: gcc Version: 7.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: matthias.hochsteger at tuwien dot ac.at Target Milestone: --- Created attachment 42141 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42141&action=edit Preprocessed source file The code below fails to compile with -std=c++17, but compiles with -std=c++14. A work-around is to add a constructor to 'Base'. The code (code.ii is attached): /////////////////////////////////// #include <initializer_list> struct Base { // Working with the follwing line // ~Base() {} }; struct Derived : public Base { Derived (std::initializer_list<int> list) { } ~Derived() { } }; void foo(Base a) { } void bar() { foo(Derived{0}); } /////////////////////////////////// The compiler call: > c++ -v -save-temps -std=c++17 -c code.cpp Using built-in specs. COLLECT_GCC=c++ Target: x86_64-pc-linux-gnu Configured with: /build/gcc/src/gcc/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 --disable-multilib --disable-werror --enable-checking=release --enable-default-pie --enable-default-ssp Thread model: posix gcc version 7.2.0 (GCC) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++1z' '-c' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/cc1plus -E -quiet -v -D_GNU_SOURCE code.cpp -mtune=generic -march=x86-64 -std=c++1z -fpch-preprocess -o code.ii ignoring nonexistent directory "/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../x86_64-pc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0 /usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/x86_64-pc-linux-gnu /usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/backward /usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/include /usr/local/include /usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/include-fixed /usr/include End of search list. COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++1z' '-c' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/cc1plus -fpreprocessed code.ii -quiet -dumpbase code.cpp -mtune=generic -march=x86-64 -auxbase code -std=c++1z -version -o code.s GNU C++14 (GCC) version 7.2.0 (x86_64-pc-linux-gnu) compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version 3.1.5-p2, MPC version 1.0.3, isl version isl-0.18-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C++14 (GCC) version 7.2.0 (x86_64-pc-linux-gnu) compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version 3.1.5-p2, MPC version 1.0.3, isl version isl-0.18-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: f3b185e2b85ecd352b4699fa98d9eb0f code.cpp: In function ‘void bar()’: code.cpp:17:8: internal compiler error: in assign_temp, at function.c:968 foo(Derived{0}); ~~~^~~~~~~~~~~~ Please submit a full bug report, with preprocessed source if appropriate. See <https://bugs.archlinux.org/> for instructions. ------------------------------------------------------------ Thanks, Matthias