[bug#54439] [PATCH core-updates 2/2] gnu: rust: Use rust-1.60.0

[Jim Newsome <jim@jimnewsome.net>]

From: Jim Newsome <jnewsome@torproject.org>

* gnu/packages/rust.scm (rust-1.58, rust-1.59, rust-1.60, rust):
  Add rust-1.58, rust-1.59, and rust-1.60, and update rust to
  be based on rust-1.60 instead of rust-1.57.
---
 gnu/packages/rust.scm | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/rust.scm b/gnu/packages/rust.scm
index d85acef696..ebad9dc9e5 100644
--- a/gnu/packages/rust.scm
+++ b/gnu/packages/rust.scm
@@ -541,8 +541,35 @@ (define rust-1.56
 
 (define rust-1.57
   (rust-bootstrapped-package
+   ;; Verified that it *doesn't* build with 1.55. e.g.:
+   ;; * feature `edition2021` is required
    rust-1.56 "1.57.0" "06jw8ka2p3kls8p0gd4p0chhhb1ia1mlvj96zn78n7qvp71zjiim"))
 
+(define rust-1.58
+  (rust-bootstrapped-package
+   ;; Verified that it *doesn't* build with 1.56. e.g.:
+   ;; * error: attributes starting with `rustc` are reserved for use by the
+   ;;   `rustc` compiler
+   ;; * error: cannot find attribute `rustc_do_not_const_check` in this scope
+   ;; * error[E0522]: definition of an unknown language item:
+   ;;   `const_eval_select_ct`
+   rust-1.57 "1.58.1" "1iq7kj16qfpkx8gvw50d8rf7glbm6s0pj2y1qkrz7mi56vfsyfd8"))
+
+(define rust-1.59
+  (rust-bootstrapped-package
+   ;; Verified that it *doesn't* build with 1.57. e.g.:
+   ;; * error: `doc(primitive)` should never have been stable
+   ;; * error[E0522]: definition of an unknown language item:
+   ;;   `generator_return`
+   ;; * error[E0206]: the trait `Copy` may not be implemented for this type
+   rust-1.58 "1.59.0" "1yc5bwcbmbwyvpfq7zvra78l0r8y3lbv60kbr62fzz2vx2pfxj57"))
+
+(define rust-1.60
+  (rust-bootstrapped-package
+   ;; Verified that it *doesn't* build with 1.58. e.g.:
+   ;; * error: unknown codegen option: `symbol-mangling-version`
+   rust-1.59 "1.60.0" "1drqr0a26x1rb2w3kj0i6abhgbs3jx5qqkrcwbwdlx7n3inq5ji0"))
+
 ;;; Note: Only the latest versions of Rust are supported and tested.  The
 ;;; intermediate rusts are built for bootstrapping purposes and should not
 ;;; be relied upon.  This is to ease maintenance and reduce the time
@@ -551,7 +578,7 @@ (define rust-1.57
 ;;; Here we take the latest included Rust, make it public, and re-enable tests
 ;;; and extra components such as rustfmt.
 (define-public rust
-  (let ((base-rust rust-1.57))
+  (let ((base-rust rust-1.60))
     (package
       (inherit base-rust)
       (outputs (cons "rustfmt" (package-outputs base-rust)))
-- 
2.25.1