% racer complete std::io::B
Unable to find libstd under RUST_SRC_PATH. N.B. RUST_SRC_PATH variable needs to point to the src directory inside a rust checkout e.g. "/home/foouser/src/rust/src". Current value ""/nix/store/fjghknnd4x9zpgx6hxznaiw6c7y0jr2s-rust-1.47.0-2020-10-07-18bf6b4f0/lib/rustlib/src/rust/library/libstd""
% racer complete std::io::B Unable to find libstd under RUST_SRC_PATH. N.B. RUST_SRC_PATH variable needs to point to the src directory inside a rust checkout e.g. "/home/foouser/src/rust/src". Current value ""/nix/store/fjghknnd4x9zpgx6hxznaiw6c7y0jr2s-rust-1.47.0-2020-10-07-18bf6b4f0/lib/rustlib/src/rust/library/libstd""
I use nix Mozilla-rust-overlay stable
nixpkgs.latest.rustChannels.stable.rust.override { extensions = [ #
"lldb-preview"
Thanks