[clangd-11] Consistent-comparison + designated initialisers = crash

[cjdb]

Given a compile_commands.json with

{
  "directory": "/home/christopher/projects/wl/build-Release",
  "command": "/usr/bin/clang++-11   -I../include -I../   -fvisibility=hidden -fstack-protector -fdiagnostics-color=always -pedantic -Werror -Wall -Wextra -Wcast-align -Wconversion -Wdouble-promotion -Wnon-virtual-dtor -Wold-style-cast -Woverloaded-virtual -Wshadow -Wsign-conversion -Wsign-promo -Wunused -Wformat=2 -Wodr -Wno-attributes -Wnull-dereference -Wno-unused-command-line-argument -stdlib=libc++ -O3 -DNDEBUG -fsanitize=cfi -flto=thin   -std=c++2a -o CMakeFiles/demo.dir/demo.cpp.o -c /home/christopher/projects/wl/demo.cpp",
  "file": "/home/christopher/projects/wl/demo.cpp"
},

This program crashes clangd-11.

struct s {
	int x;
	friend auto operator==(s a, s b) -> bool = default;
};

auto main() -> int {
	auto a = s{.x = 0};
	auto b = s{.x = 1};
	return a != b;
}

It seems to be the combination of generating operator== and operator!= as friends (members are okay), using the one of the generated operators, and also using designated initialisers. Remove any of the three from the piece, and the crash isn't triggered.

Logs
Please attach the clangd stderr log if you can. (Usually available from the editor)
If possible, run with --log=verbose - note that the logs will include the contents of open files!
If this is a crash, try to put llvm-symbolizer on your PATH per the troubleshooting instructions.

clangd-output.txt

System information
Output of clangd --version: clangd version 11.0.0-++20200510052610+bcc5ed7b24e-1~exp1~20200510153213.37
Editor/LSP plugin: VS Code
Operating system: WSL Ubuntu20.04