src/test/ui/issues/issue-57597.stderr

   1 error: repetition matches empty token tree
   2   --> $DIR/issue-57597.rs:8:7
   3    |
   4 LL |     ($($($i:ident)?)+) => {};
   5    |       ^^^^^^^^^^^^^^
   6
   7 error: repetition matches empty token tree
   8   --> $DIR/issue-57597.rs:13:7
   9    |
  10 LL |     ($($($i:ident)?)*) => {};
  11    |       ^^^^^^^^^^^^^^
  12
  13 error: repetition matches empty token tree
  14   --> $DIR/issue-57597.rs:18:7
  15    |
  16 LL |     ($($($i:ident)?)?) => {};
  17    |       ^^^^^^^^^^^^^^
  18
  19 error: repetition matches empty token tree
  20   --> $DIR/issue-57597.rs:23:7
  21    |
  22 LL |     ($($($($i:ident)?)?)?) => {};
  23    |       ^^^^^^^^^^^^^^^^^^
  24
  25 error: repetition matches empty token tree
  26   --> $DIR/issue-57597.rs:28:7
  27    |
  28 LL |     ($($($($i:ident)*)?)?) => {};
  29    |       ^^^^^^^^^^^^^^^^^^
  30
  31 error: repetition matches empty token tree
  32   --> $DIR/issue-57597.rs:33:7
  33    |
  34 LL |     ($($($($i:ident)?)*)?) => {};
  35    |       ^^^^^^^^^^^^^^^^^^
  36
  37 error: repetition matches empty token tree
  38   --> $DIR/issue-57597.rs:38:7
  39    |
  40 LL |     ($($($($i:ident)?)?)*) => {};
  41    |       ^^^^^^^^^^^^^^^^^^
  42
  43 error: repetition matches empty token tree
  44   --> $DIR/issue-57597.rs:43:7
  45    |
  46 LL |     ($($($($i:ident)*)*)?) => {};
  47    |       ^^^^^^^^^^^^^^^^^^
  48
  49 error: repetition matches empty token tree
  50   --> $DIR/issue-57597.rs:48:7
  51    |
  52 LL |     ($($($($i:ident)?)*)*) => {};
  53    |       ^^^^^^^^^^^^^^^^^^
  54
  55 error: repetition matches empty token tree
  56   --> $DIR/issue-57597.rs:53:7
  57    |
  58 LL |     ($($($($i:ident)?)*)+) => {};
  59    |       ^^^^^^^^^^^^^^^^^^
  60
  61 error: repetition matches empty token tree
  62   --> $DIR/issue-57597.rs:58:7
  63    |
  64 LL |     ($($($($i:ident)+)?)*) => {};
  65    |       ^^^^^^^^^^^^^^^^^^
  66
  67 error: repetition matches empty token tree
  68   --> $DIR/issue-57597.rs:63:7
  69    |
  70 LL |     ($($($($i:ident)+)*)?) => {};
  71    |       ^^^^^^^^^^^^^^^^^^
  72
  73 error: aborting due to 12 previous errors
  74