error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:40:11
   |
40 |     foo!(a?a?a); //~ ERROR no rules expected the token `?`
   |           ^

error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:41:11
   |
41 |     foo!(a?a); //~ ERROR no rules expected the token `?`
   |           ^

error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:42:11
   |
42 |     foo!(a?); //~ ERROR no rules expected the token `?`
   |           ^

error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:43:11
   |
43 |     baz!(a?a?a); //~ ERROR no rules expected the token `?`
   |           ^

error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:44:11
   |
44 |     baz!(a?a); //~ ERROR no rules expected the token `?`
   |           ^

error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:45:11
   |
45 |     baz!(a?); //~ ERROR no rules expected the token `?`
   |           ^

error: unexpected end of macro invocation
  --> $DIR/macro-at-most-once-rep-ambig.rs:46:11
   |
46 |     baz!(a,); //~ ERROR unexpected end of macro invocation
   |           ^

error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:47:11
   |
47 |     baz!(a?a?a,); //~ ERROR no rules expected the token `?`
   |           ^

error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:48:11
   |
48 |     baz!(a?a,); //~ ERROR no rules expected the token `?`
   |           ^

error: no rules expected the token `?`
  --> $DIR/macro-at-most-once-rep-ambig.rs:49:11
   |
49 |     baz!(a?,); //~ ERROR no rules expected the token `?`
   |           ^

error: unexpected end of macro invocation
  --> $DIR/macro-at-most-once-rep-ambig.rs:50:5
   |
50 |     barplus!(); //~ ERROR unexpected end of macro invocation
   |     ^^^^^^^^^^^

error: unexpected end of macro invocation
  --> $DIR/macro-at-most-once-rep-ambig.rs:51:15
   |
51 |     barplus!(a?); //~ ERROR unexpected end of macro invocation
   |               ^

error: unexpected end of macro invocation
  --> $DIR/macro-at-most-once-rep-ambig.rs:52:15
   |
52 |     barstar!(a?); //~ ERROR unexpected end of macro invocation
   |               ^

error: aborting due to 13 previous errors