https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52869
Sven Suursoho <spam+gcc at alt dot ee> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |spam+gcc at alt dot ee --- Comment #20 from Sven Suursoho <spam+gcc at alt dot ee> --- Seems some variant of this bug has returned with g++-11 (but not in g++-10) $ cat s.cpp struct S { void f() noexcept {} S &g() noexcept(noexcept(f())) { f(); return *this; } }; $ g++-11 -Wall -Werror -std=c++2a -c s.cpp s.cpp:4:31: error: cannot call member function 'void S::f()' without object 4 | S &g() noexcept(noexcept(f())) { f(); return *this; } | ~^~ $ cat s.cpp struct S { void f() noexcept {} S &g() noexcept(noexcept(this->f())) { f(); return *this; } }; $ g++-11 -Wall -Werror -std=c++2a -c s.cpp s.cpp:4:30: error: invalid use of 'this' at top level 4 | S &g() noexcept(noexcept(this->f())) { f(); return *this; } | ^~~~ $ cat workaround.cpp struct S { void f() noexcept {} auto g() noexcept(noexcept(this->f())) -> S& { f(); return *this; } }; $ g++-11 -Wall -Werror -std=c++2a -c workaround.cpp $ g++-11 -v Using built-in specs. COLLECT_GCC=g++-11 COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc/11.1.0/libexec/gcc/x86_64-apple-darwin19/11.1.0/lto-wrapper Target: x86_64-apple-darwin19 Configured with: ../configure --prefix=/usr/local/Cellar/gcc/11.1.0 --libdir=/usr/local/Cellar/gcc/11.1.0/lib/gcc/11 --disable-nls --enable-checking=release --enable-languages=c,c++,objc,obj-c++,fortran,d --program-suffix=-11 --with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr --with-mpc=/usr/local/opt/libmpc --with-isl=/usr/local/opt/isl --with-pkgversion='Homebrew GCC 11.1.0' --with-bugurl=https://github.com/Homebrew/homebrew-core/issues --enable-libphobos --build=x86_64-apple-darwin19 --with-system-zlib --disable-multilib --with-native-system-header-dir=/usr/include --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk Thread model: posix Supported LTO compression algorithms: zlib gcc version 11.1.0 (Homebrew GCC 11.1.0) ~ $ uname -a Darwin home.local 19.6.0 Darwin Kernel Version 19.6.0: Mon Apr 12 20:57:45 PDT 2021; root:xnu-6153.141.28.1~1/RELEASE_X86_64 x86_64