Opened https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103499 On Tue, Nov 30, 2021 at 8:16 AM Oleg Smolsky <osmolsky@xxxxxxxxxxxx> wrote: > FWIIW, this case does compile with Clang12: > > /opt/llvm-12/bin/clang++ task.cpp -std=c++20 -c -o task.pcm -Xclang > -emit-module-interface > /opt/llvm-12/bin/clang++ task.cpp -std=c++20 -c -o task.o > -fprebuilt-module-path=. > /opt/llvm-12/bin/clang++ main.cpp -std=c++20 -c -o main.o > -fprebuilt-module-path=. > > On Mon, Nov 29, 2021 at 4:08 PM Oleg Smolsky <osmolsky@xxxxxxxxxxxx> > wrote: > >> Hi there! I'm trying to integrate C++20 modules into my project and got >> stuck on a "virtual destructor" issue. Here is a minimal reproducer >> rejected by GCC11: >> >> /opt/gcc-11/bin/g++ -std=c++20 -fmodules-ts -c -o main.o main.cpp >> main.cpp: In function ‘int main()’: >> main.cpp:6:12: error: invalid use of non-static member function ‘virtual >> Derived@task::~Derived()’ >> 6 | delete p; >> >> The module is called "task" and here is its interface (task.cpp): >> >> export module task; >> #include "b.h" >> #include "d.h" >> >> b.h: >> >> #pragma once >> export struct Base { >> virtual ~Base() = default; >> void DoStuff(); >> }; >> >> b.cpp: >> >> module; >> #include <string> >> module task; >> void Base::DoStuff() {} >> >> The consumer is exactly what you'd imagine - "new Derived;", followed by >> a virtual call, followed by the "delete". >> >> How is this supposed to work? Is this code Standard-compliant? >> >> Thanks! >> Oleg. >> >
