dev-lang/rust: port fix for compile fault with +parallel +miri

rust-lang/rust#87623

Signed-off-by: Miezhiko <[email protected]>

Author: Miezhiko

dev-lang/rust/files/1.54.0-parallel-miri.patch

@@ -0,0 +1,43 @@
+From a789b49e4c0e7d742cc39713484596293d844537 Mon Sep 17 00:00:00 2001
+From: hyd-dev <[email protected]>
+Date: Fri, 30 Jul 2021 21:28:34 +0800
+Subject: [PATCH] Use `Lrc` instead of `Rc` in `MiriCompilerCalls::config()`
+
+---
+ src/bin/miri.rs | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/src/tools/miri/src/bin/miri.rs b/src/tools/miri/src/bin/miri.rs
+index 5a8f07263..18c393815 100644
+--- a/src/tools/miri/src/bin/miri.rs
++++ b/src/tools/miri/src/bin/miri.rs
+@@ -1,5 +1,6 @@
+ #![feature(rustc_private, bool_to_option, stmt_expr_attributes)]
+ 
++extern crate rustc_data_structures;
+ extern crate rustc_driver;
+ extern crate rustc_errors;
+ extern crate rustc_hir;
+@@ -12,12 +13,12 @@ use std::convert::TryFrom;
+ use std::env;
+ use std::num::NonZeroU64;
+ use std::path::PathBuf;
+-use std::rc::Rc;
+ use std::str::FromStr;
+ 
+ use hex::FromHexError;
+ use log::debug;
+ 
++use rustc_data_structures::sync::Lrc;
+ use rustc_driver::Compilation;
+ use rustc_errors::emitter::{ColorConfig, HumanReadableErrorType};
+ use rustc_hir::{self as hir, def_id::LOCAL_CRATE, Node};
+@@ -42,7 +43,7 @@ impl rustc_driver::Callbacks for MiriCompilerCalls {
+                 // HACK: rustc will emit "crate ... required to be available in rlib format, but
+                 // was not found in this form" errors once we use `tcx.dependency_formats()` if
+                 // there's no rlib provided, so setting a dummy path here to workaround those errors.
+-                Rc::make_mut(&mut crate_source).rlib = Some((PathBuf::new(), PathKind::All));
++                Lrc::make_mut(&mut crate_source).rlib = Some((PathBuf::new(), PathKind::All));
+                 crate_source
+             };
+         });

dev-lang/rust/rust-1.54.0.ebuild

@@ -149,6 +149,7 @@ PATCHES=(
 	"${FILESDIR}"/1.47.0-ignore-broken-and-non-applicable-tests.patch
 	"${FILESDIR}"/1.49.0-gentoo-musl-target-specs.patch
 	"${FILESDIR}"/1.53.0-rustversion-1.0.5.patch # https://github.com/rust-lang/rust/pull/86425
+	"${FILESDIR}"/1.54.0-parallel-miri.patch # https://github.com/rust-lang/miri/pull/1863
 )
 
 S="${WORKDIR}/${MY_P}-src"