I haven't used IDE for a while and today, when i opened to do something, it was throwing me multiple errors.
Error 1 : error: Found argument '--filter-platform' which wasn't expected, or isn't valid in this context
The rust-analyzer invokes the command cargo metadata with the flag --filter-platform. This flag was added in Rust 1.41.0. The older versions will give the following error.
C:/.cargo/bin/cargo.exe metadata --verbose --format-version 1 --all-features --filter-platform x86_64-pc-windows-msvc
stdout : error: Found argument '--filter-platform' which wasn't expected, or isn't valid in this context
Error 2 : Another error was Fetching Cargo Config failed.
Execution failed (exit code 101).
C:/.cargo/bin/cargo.exe -Z unstable-options config get
stdout :
stderr : error: no such subcommand: `config`
Error 3 : Rust 1.39.0 which is no longer supported. It may lead to unexpected errors. Consider upgrading your toolchain to at least 1.56.0
Solution is to update Rust by executing the command rustup update from your terminal.