error: missing '}' to close a placeholder. If the '{' was intended to be a literal, escape it with '{{'
 --> tests/fail/nightly/invalid_placeholder.rs:2:26
  |
2 |     sscanf::sscanf!("", "{", str);
  |                          ^

error: missing '}' to close a placeholder. If the '{' was intended to be a literal, escape it with '{{'
 --> tests/fail/nightly/invalid_placeholder.rs:3:26
  |
3 |     sscanf::sscanf!("", "{str");
  |                          ^^^^

error: missing '}' to close a placeholder. If the '{' was intended to be a literal, escape it with '{{'
 --> tests/fail/nightly/invalid_placeholder.rs:4:26
  |
4 |     sscanf::sscanf!("", "{:", str);
  |                          ^^

error: missing '}' to close a placeholder. If the '{' was intended to be a literal, escape it with '{{'
 --> tests/fail/nightly/invalid_placeholder.rs:5:26
  |
5 |     sscanf::sscanf!("", "{:b", str);
  |                          ^^^

error: missing '}' to close a placeholder. If the '{' was intended to be a literal, escape it with '{{'
 --> tests/fail/nightly/invalid_placeholder.rs:6:26
  |
6 |     sscanf::sscanf!("", "{://", str);
  |                          ^^^^

error: format options cannot be empty. Consider removing the ':'
 --> tests/fail/nightly/invalid_placeholder.rs:7:28
  |
7 |     sscanf::sscanf!("", "{:}}", str);
  |                            ^

error: unexpected standalone '}'. Literal '}' need to be escaped as '}}'
 --> tests/fail/nightly/invalid_placeholder.rs:8:26
  |
8 |     sscanf::sscanf!("", "}", str);
  |                          ^

error: unexpected standalone '}'. Literal '}' need to be escaped as '}}'
 --> tests/fail/nightly/invalid_placeholder.rs:9:27
  |
9 |     sscanf::sscanf!("", ":}", str);
  |                           ^

error: unexpected standalone '}'. Literal '}' need to be escaped as '}}'
  --> tests/fail/nightly/invalid_placeholder.rs:10:29
   |
10 |     sscanf::sscanf!("", "{{:}", str);
   |                             ^

error: missing `:` in front of custom regex. Write `{:/.*?/}` instead
  --> tests/fail/nightly/invalid_placeholder.rs:11:27
   |
11 |     sscanf::sscanf!("", "{/.*?/}", str);
   |                           ^^^^^