Update

ftplugin/rust.vim

@@ -56,6 +56,21 @@ if exists("g:loaded_delimitMate")
 	let b:delimitMate_excluded_regions = delimitMate#Get("excluded_regions") . ',rustLifetimeCandidate,rustGenericLifetimeCandidate'
 endif
 
+if has("folding") && exists('g:rust_fold') && g:rust_fold != 0
+	let b:rust_set_foldmethod=1
+	setlocal foldmethod=syntax
+	if g:rust_fold == 2
+		setlocal foldlevel<
+	else
+		setlocal foldlevel=99
+	endif
+endif
+
+if has('conceal') && exists('g:rust_conceal')
+	let b:rust_set_conceallevel=1
+	setlocal conceallevel=2
+endif
+
 " Motion Commands {{{1
 
 " Bind motion commands to support hanging indents
@@ -103,6 +118,14 @@ let b:undo_ftplugin = "
 		\|else
 		  \|unlet! b:delimitMate_excluded_regions
 		\|endif
+		\|if exists('b:rust_set_foldmethod')
+		  \|setlocal foldmethod< foldlevel<
+		  \|unlet b:rust_set_foldmethod
+		\|endif
+		\|if exists('b:rust_set_conceallevel')
+		  \|setlocal conceallevel<
+		  \|unlet b:rust_set_conceallevel
+		\|endif
 		\|unlet! b:rust_last_rustc_args b:rust_last_args
 		\|delcommand RustRun
 		\|delcommand RustExpand