fix: Fix parser panicking on invalid asm options

Author: Veykril

src/tools/rust-analyzer/crates/hir-ty/src/tests/macros.rs

@@ -1498,6 +1498,11 @@ fn main() {
             43..44 '1': i32
             58..63 'mut o': i32
             66..67 '0': i32
+            !95..104 'thread_id': usize
+            !103..107 '&foo': &'? i32
+            !104..107 'foo': i32
+            !115..120 '&muto': &'? mut i32
+            !119..120 'o': i32
             293..294 'o': i32
             308..317 'thread_id': usize
         "#]],

src/tools/rust-analyzer/crates/parser/src/grammar/expressions/atom.rs

@@ -434,6 +434,7 @@ fn parse_options(p: &mut Parser<'_>) {
         let m = p.start();
         if !OPTIONS.iter().any(|&syntax| p.eat_contextual_kw(syntax)) {
             p.err_and_bump("expected asm option");
+            m.abandon(p);
             continue;
         }
         m.complete(p, ASM_OPTION);