5651: Add track_env_var to the proc macro server r=kjeremy a=lnicola

See https://github.com/rust-lang/rust/pull/74653.

Fixes #6054.
Fixes #5640, maybe.

Should be merged when 1.47 is released.

Proc macros still don't work for me, but it no longer crashes.



Co-authored-by: Laurențiu Nicola <lnicola@dend.ro>
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bors[bot] 2020-10-08 14:27:30 +00:00 committed by GitHub
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@ -7,7 +7,7 @@ use anyhow::{bail, format_err, Context, Result};
use crate::not_bash::{pushd, run};
// Latest stable, feel free to send a PR if this lags behind.
const REQUIRED_RUST_VERSION: u32 = 46;
const REQUIRED_RUST_VERSION: u32 = 47;
pub struct InstallCmd {
pub client: Option<ClientOpt>,