1 error: repetition matches empty token tree
2 --> $DIR/issue-5067.rs:9:8
7 error: repetition matches empty token tree
8 --> $DIR/issue-5067.rs:11:8
13 error: repetition matches empty token tree
14 --> $DIR/issue-5067.rs:13:8
19 error: repetition matches empty token tree
20 --> $DIR/issue-5067.rs:18:9
22 LL | ( [$()*] ) => {};
25 error: repetition matches empty token tree
26 --> $DIR/issue-5067.rs:20:9
28 LL | ( [$()+] ) => {};
31 error: repetition matches empty token tree
32 --> $DIR/issue-5067.rs:22:9
34 LL | ( [$()?] ) => {};
37 error: repetition matches empty token tree
38 --> $DIR/issue-5067.rs:27:8
40 LL | ( $($()* $(),* $(a)* $(a),* )* ) => {};
41 | ^^^^^^^^^^^^^^^^^^^^^^^^^^
43 error: repetition matches empty token tree
44 --> $DIR/issue-5067.rs:29:8
46 LL | ( $($()* $(),* $(a)* $(a),* )+ ) => {};
47 | ^^^^^^^^^^^^^^^^^^^^^^^^^^
49 error: repetition matches empty token tree
50 --> $DIR/issue-5067.rs:31:8
52 LL | ( $($()* $(),* $(a)* $(a),* )? ) => {};
53 | ^^^^^^^^^^^^^^^^^^^^^^^^^^
55 error: repetition matches empty token tree
56 --> $DIR/issue-5067.rs:33:8
58 LL | ( $($()? $(),* $(a)? $(a),* )* ) => {};
59 | ^^^^^^^^^^^^^^^^^^^^^^^^^^
61 error: repetition matches empty token tree
62 --> $DIR/issue-5067.rs:35:8
64 LL | ( $($()? $(),* $(a)? $(a),* )+ ) => {};
65 | ^^^^^^^^^^^^^^^^^^^^^^^^^^
67 error: repetition matches empty token tree
68 --> $DIR/issue-5067.rs:37:8
70 LL | ( $($()? $(),* $(a)? $(a),* )? ) => {};
71 | ^^^^^^^^^^^^^^^^^^^^^^^^^^
73 error: repetition matches empty token tree
74 --> $DIR/issue-5067.rs:47:12
76 LL | ( $(a $()+)* ) => {};
79 error: repetition matches empty token tree
80 --> $DIR/issue-5067.rs:49:12
82 LL | ( $(a $()*)+ ) => {};
85 error: repetition matches empty token tree
86 --> $DIR/issue-5067.rs:51:12
88 LL | ( $(a $()+)? ) => {};
91 error: repetition matches empty token tree
92 --> $DIR/issue-5067.rs:53:12
94 LL | ( $(a $()?)+ ) => {};
97 error: repetition matches empty token tree
98 --> $DIR/issue-5067.rs:60:18
100 LL | (a $e1:expr $($(, a $e2:expr)*)*) => ([$e1 $($(, $e2)*)*]);
103 error: repetition matches empty token tree
104 --> $DIR/issue-5067.rs:71:8
109 error: aborting due to 18 previous errors