Panic on computing code actions on incorrect code

[fenuks]

I'm using Arch Linux, nvim LSP, and rust-analyzer d15f646 2021-08-31 dev.

fn main() {
    let v = vec![];
    v.map(::to_rfc3339());
}

Bug occurs when I put cursor on ::to_rfc3339(). Brackets are important, crash doesn't occur with code like v.map(::to_rfc3339);.

Crash log captured by LSP client:

[ ERROR ] 2021-09-07T16:18:41+0200 ] /usr/share/nvim/runtime/lua/vim/lsp/rpc.lua:462 ]  "rpc"   "/usr/local/bin/rust-analyzer"  "stderr"        "Panic context:
> 
version: d15f646ff 2021-08-31 dev
request: textDocument/codeAction CodeActionParams {
    text_document: TextDocumentIdentifier {
        uri: Url {
            scheme: "file",
            cannot_be_a_base: false,
            username: "",
            password: None,
            host: None,
            port: None,
            path: "/tmp/test.rs",
            query: None,
            fragment: None,
        },
    },
    range: Range {
        start: Position {
            line: 2,
            character: 22,
        },
        end: Position {
            line: 2,
            character: 22,
        },
    },
    context: CodeActionContext {
        diagnostics: [],
        only: None,
    },
    work_done_progress_params: WorkDoneProgressParams {
        work_done_token: None,
    },
    partial_result_params: PartialResultParams {
        partial_result_token: None,
    },
}

thread '<unnamed>' panicked at 'Failed to make ast node `syntax::ast::generated::nodes::Name` from text mod ::to_rfc3339;', crates/syntax/src/ast/make.rs:675:13
stack backtrace:
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Unfortunately, I don't know how to capture full backtrace.

In /usr/local/bin/rust-analyzer I put:

#!/usr/bin/env sh
export RUST_BACKTRACE=full
/usr/bin/rust-analyzer "$@"

but nonetheless I still get information that I need to set RUST_BACKTRACE… Also tried to set it in /etc/profile and /etc/environment, to no avail. Hopefully it is enough to replicate the issue, it triggers for me 100% of the time.