Commit: runtime(compiler): improve rust errorformat

[Christian Brabandt]

runtime(compiler): improve rust errorformat

Commit: https://github.com/vim/vim/commit/fe0bafc7286b5b18b2f8df449041f390cbf621ab
Author: yilisharcs <yilis...@gmail.com>
Date: Thu Dec 18 21:14:12 2025 +0100

runtime(compiler): improve rust errorformat

This commit adds match patterns for:
- warnings with error codes (warning[E0123]: foobar)
- valid nightly unicode entries

closes: #18957

Signed-off-by: yilisharcs <yilis...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/compiler/rustc.vim b/runtime/compiler/rustc.vim
index ca261d857..0b4889185 100644
--- a/runtime/compiler/rustc.vim
+++ b/runtime/compiler/rustc.vim
@@ -3,6 +3,7 @@
" Maintainer: Chris Morgan <m...@chrismorgan.info>
" Latest Revision: 2023-09-11
" 2025 Nov 15 by Vim project: remove test for Vim patch 7.4.191
+" 2025 Dec 18 by Vim project: detect more errors #18957
" For bugs, patches and license go to https://github.com/rust-lang/rust.vim

if exists("current_compiler")
@@ -29,8 +30,10 @@ CompilerSet errorformat=
\%Eerror:\ %m,
\%Eerror[E%n]:\ %m,
\%Wwarning:\ %m,
+ \%Wwarning[E%n]:\ %m,
\%Inote:\ %m,
\%C\ %#-->\ %f:%l:%c,
+ \%C\ %#╭▸\ %f:%l:%c,
\%E\ \ left:%m,%C\ right:%m\ %f:%l:%c,%Z

" Old errorformat (before nightly 2016/08/10)