Fix using include_bytes in pattern position

Author: clubby789

compiler/rustc_expand/src/base.rs

@@ -507,7 +507,7 @@ impl MacResult for MacEager {
             return Some(p);
         }
         if let Some(e) = self.expr {
-            if let ast::ExprKind::Lit(_) = e.kind {
+            if matches!(e.kind, ast::ExprKind::Lit(_) | ast::ExprKind::IncludedBytes(_)) {
                 return Some(P(ast::Pat {
                     id: ast::DUMMY_NODE_ID,
                     span: e.span,

src/test/ui/proc-macro/expand-expr.rs

@@ -123,4 +123,10 @@ expand_expr_fail!(echo_pm!(arbitrary_expression() + "etc"));
 
 const _: u32 = recursive_expand!(); //~ ERROR: recursion limit reached while expanding `recursive_expand!`
 
-fn main() {}
+fn main() {
+    // https://github.com/rust-lang/rust/issues/104414
+    match b"a" {
+        include_bytes!("auxiliary/included-file.txt") => (),
+        _ => ()
+    }
+}