Wrong failure position?

[kusnezoff-alexander]

I have an example which doesn't work as I would expect it to work.
Here are the details:

Demo

Defined Grammar-Rules:

S = { ("\x20" | "\x09" | "\x0D" | "\x0A")+ }
Quote = { "'" | "\"" }
VersionInfo = { S ~ "version" ~ Eq ~ PUSH(Quote) ~ VersionNum ~ POP }
Eq = { S? ~ "=" ~ S? } // [25]
VersionNum = { "1." ~ ASCII_DIGIT+ }

Defined Unittest:

// opening and closing quotes not matching:
fails_with! {
    parser: XMLParser, input: r#" version='1.1""#, rule: Rule::VersionInfo,
    positives: vec![Rule::VersionInfo], negatives: vec![], pos: 13
};

Expected Behavior

Test passes-Parser reads until here:

 version='1.1"
                      ^

notices that "!=' which is currently on stack -> the error should be at position=13 following the rule Rule::VersionInfo

Actual Behavior

assertion `left == right` failed: positives
  left: [S]
 right: [VersionInfo]

And if i change positives to vec![Rule::S] then:

assertion `left == right` failed: pos
  left: 9
 right: 13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

I don't see why, I hope someone of you guys can spot the mistake 😃