https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91121
Bug ID: 91121 Summary: ICE with type deduction guides and CRTP base class Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: gcc-bugs at marehr dot dialup.fu-berlin.de Target Milestone: --- Hello gcc-team, the following code will ICE ```c++ template <typename> struct a { a(int); }; template <typename> struct b : a<b<int>> { using a<b>::a; }; template <typename c> b(c)->b<c>; struct e { template <typename d> e(d); } e{b{2}}; ``` with ``` > g++-git -std=c++17 ice.cpp ice.cpp:6:8: internal compiler error: Segmentation fault 6 | } e{b{2}}; | ^ Please submit a full bug report, with preprocessed source if appropriate. See <https://bugs.archlinux.org/> for instructions. ``` gcc version: ``` g++-git -v Using built-in specs. COLLECT_GCC=g++-git COLLECT_LTO_WRAPPER=/opt/gcc/gcc-git/bin/../lib/gcc/x86_64-pc-linux-gnu/10.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /home/marehr/Packages/gcc-git/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 --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 --enable-default-pie --enable-default-ssp --enable-cet=auto Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 10.0.0 20190709 (experimental) (GCC) ``` Thank you!