1.18.0 and nightly ICE on invalid code: attempted to bump the parser past EOF (may be stuck in a loop)

[zhendongsu]

$ rustc --version
rustc 1.20.0-nightly (bf0a9e0b4 2017-07-10)
$ 
$ rustc tmp.rs
error: expected expression, found `<eof>`
 --> tmp.rs:1:26
  |
1 | fn main () { let x = | } |
  |                          ^

error: internal compiler error: attempted to bump the parser past EOF (may be stuck in a loop)
 --> tmp.rs:1:26
  |
1 | fn main () { let x = | } |
  |                          ^

error: aborting due to 2 previous errors

$ 
$ rustc-1.18.0 tmp.rs
error: expected expression, found `<eof>`
 --> tmp.rs:1:26
  |
1 | fn main () { let x = | } |
  |                          ^

error: internal compiler error: attempted to bump the parser past EOF (may be stuck in a loop)
 --> tmp.rs:1:26
  |
1 | fn main () { let x = | } |
  |                          ^

error: aborting due to 2 previous errors

$ 
$ cat tmp.rs
fn main () { let x = | } |
$ 

[DanielJin21]

Even more minimal test case: fn main() { | } |

The parser for some reason is expecting a pattern by end of the second |.

[goffrie]

The ICE is fixed in nightly.