False negative test in vm/tests/grammar.rs on my environment

[Tartasprint]

Earlier in #1048 some tests did not pass on my machine (Windows, VSCode 1.94.2, Rust 1.82.0), . The first one was because I didn't configure properly VSCode to use LF end of lines. It was a bit hard to figure out because cargo test was giving a diff between two strings that looked the same when printed to the terminal. But I changed my configuration, and that test passed.

But another set of tests is now failing. I was pretty sure it was another mistake I made similar to the first one, because the tests were completely unrelated to the very small change I made (adding a test shouldn't break other tests). So I pushed my changes anyway, and the tests passed on Github.

While I am happy the tests were all right, I would like to fix this testing problem. Did anyone run into similar problems ?

Here is the output of test -p pest_vm --test grammar

warning: `C:\_Travail\pest\pest\.cargo\config` is deprecated in favor of `config.toml`
note: if you need to support cargo 1.38 or earlier, you can symlink `config` to `config.toml`
   Compiling unicode-ident v1.0.13
   Compiling cfg-if v1.0.0
   Compiling proc-macro2 v1.0.88
   Compiling sha2 v0.10.8
   Compiling pest_meta v2.7.14 (C:\_Travail\pest\pest\meta)
   Compiling quote v1.0.37
   Compiling syn v2.0.79
   Compiling thiserror-impl v1.0.64
   Compiling thiserror v1.0.64
   Compiling pest v2.7.14 (C:\_Travail\pest\pest\pest)
   Compiling pest_vm v2.7.14 (C:\_Travail\pest\pest\vm)
    Finished `test` profile [unoptimized + debuginfo] target(s) in 11.96s
     Running tests\grammar.rs (target\debug\deps\grammar-d79d59864d35e3e7.exe)

running 77 tests
test ascii_digits ... FAILED
test ascii_bin_digits ... FAILED
test ascii_hex_digits ... FAILED
test ascii_alpha_lowers ... FAILED
test ascii_alphanumerics ... FAILED
test arabic ... FAILED
test ascii_alphas ... FAILED
test ascii_alpha_uppers ... FAILED
test ascii_nonzero_digits ... FAILED
test ascii_oct_digits ... FAILED
test asciis ... FAILED
test checkpoint_restore ... FAILED
test choice_range ... FAILED
test choice_string ... FAILED
test double_neg_pred ... FAILED
test emoji ... FAILED
test ident ... FAILED
test insensitive ... FAILED
test neg_pred ... FAILED
test newline ... FAILED
test optional_empty ... FAILED
test optional_string ... FAILED
test peek ... FAILED
test peek_all ... FAILED
test peek_slice_23 ... FAILED
test pop ... FAILED
test pop_all ... FAILED
test pop_fail ... FAILED
test pos_pred ... FAILED
test range ... FAILED
test repeat_atomic_empty ... FAILED
test repeat_atomic_space - should panic ... ok
test repeat_atomic_strings ... FAILED
test repeat_comment ... FAILED
test repeat_empty ... FAILED
test repeat_exact ... FAILED
test repeat_max_atomic_once ... FAILED
test repeat_max_atomic_space - should panic ... ok
test repeat_max_atomic_thrice - should panic ... ok
test repeat_max_atomic_twice ... FAILED
test repeat_max_once ... FAILED
test repeat_max_thrice - should panic ... ok
test repeat_max_twice ... FAILED
test repeat_min_atomic_once - should panic ... ok
test repeat_min_atomic_space - should panic ... ok
test repeat_min_atomic_thrice ... FAILED
test repeat_min_atomic_twice ... FAILED
test repeat_min_max_atomic_space - should panic ... ok
test repeat_min_max_atomic_thrice ... FAILED
test repeat_min_max_atomic_twice ... FAILED
test repeat_min_max_thrice ... FAILED
test repeat_min_max_twice ... FAILED
test repeat_min_once - should panic ... ok
test repeat_min_thrice ... FAILED
test repeat_min_twice ... FAILED
test repeat_mutate_stack ... FAILED
test repeat_once_atomic_empty - should panic ... ok
test repeat_once_atomic_space - should panic ... ok
test repeat_once_atomic_strings ... FAILED
test repeat_once_empty - should panic ... ok
test repeat_once_strings ... FAILED
test repeat_strings ... FAILED
test sequence ... FAILED
test sequence_atomic ... FAILED
test sequence_atomic_compound ... FAILED
test sequence_atomic_space - should panic ... ok
test sequence_compound ... FAILED
test sequence_compound_nested ... FAILED
test sequence_compound_nested_space - should panic ... ok
test sequence_non_atomic ... FAILED
test shadowing ... FAILED
test soi_at_start ... FAILED
test string ... FAILED
test test_han ... FAILED
test test_hangul ... FAILED
test test_hiragana ... FAILED
test unicode ... FAILED

failures:

---- ascii_digits stdout ----
thread 'ascii_digits' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ascii_bin_digits stdout ----
thread 'ascii_bin_digits' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ascii_hex_digits stdout ----
thread 'ascii_hex_digits' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ascii_alpha_lowers stdout ----
thread 'ascii_alpha_lowers' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ascii_alphanumerics stdout ----
thread 'ascii_alphanumerics' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- arabic stdout ----
thread 'arabic' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ascii_alphas stdout ----
thread 'ascii_alphas' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ascii_alpha_uppers stdout ----
thread 'ascii_alpha_uppers' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ascii_nonzero_digits stdout ----
thread 'ascii_nonzero_digits' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ascii_oct_digits stdout ----
thread 'ascii_oct_digits' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- asciis stdout ----
thread 'asciis' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- checkpoint_restore stdout ----
thread 'checkpoint_restore' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- choice_range stdout ----
thread 'choice_range' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- choice_string stdout ----
thread 'choice_string' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- double_neg_pred stdout ----
thread 'double_neg_pred' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- emoji stdout ----
thread 'emoji' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- ident stdout ----
thread 'ident' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- insensitive stdout ----
thread 'insensitive' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- neg_pred stdout ----
thread 'neg_pred' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- newline stdout ----
thread 'newline' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- optional_empty stdout ----
thread 'optional_empty' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- optional_string stdout ----
thread 'optional_string' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- peek stdout ----
thread 'peek' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- peek_all stdout ----
thread 'peek_all' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- peek_slice_23 stdout ----
thread 'peek_slice_23' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- pop stdout ----
thread 'pop' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- pop_all stdout ----
thread 'pop_all' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- pop_fail stdout ----
thread 'pop_fail' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- pos_pred stdout ----
thread 'pos_pred' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- range stdout ----
thread 'range' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_atomic_empty stdout ----
thread 'repeat_atomic_empty' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_atomic_strings stdout ----
thread 'repeat_atomic_strings' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_comment stdout ----
thread 'repeat_comment' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_empty stdout ----
thread 'repeat_empty' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_exact stdout ----
thread 'repeat_exact' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_max_atomic_once stdout ----
thread 'repeat_max_atomic_once' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_max_atomic_twice stdout ----
thread 'repeat_max_atomic_twice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_max_once stdout ----
thread 'repeat_max_once' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_max_twice stdout ----
thread 'repeat_max_twice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_min_atomic_thrice stdout ----
thread 'repeat_min_atomic_thrice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_min_atomic_twice stdout ----
thread 'repeat_min_atomic_twice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_min_max_atomic_thrice stdout ----
thread 'repeat_min_max_atomic_thrice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_min_max_atomic_twice stdout ----
thread 'repeat_min_max_atomic_twice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_min_max_thrice stdout ----
thread 'repeat_min_max_thrice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_min_max_twice stdout ----
thread 'repeat_min_max_twice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_min_thrice stdout ----
thread 'repeat_min_thrice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_min_twice stdout ----
thread 'repeat_min_twice' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_mutate_stack stdout ----
thread 'repeat_mutate_stack' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_once_atomic_strings stdout ----
thread 'repeat_once_atomic_strings' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_once_strings stdout ----
thread 'repeat_once_strings' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- repeat_strings stdout ----
thread 'repeat_strings' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- sequence stdout ----
thread 'sequence' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- sequence_atomic stdout ----
thread 'sequence_atomic' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- sequence_atomic_compound stdout ----
thread 'sequence_atomic_compound' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- sequence_compound stdout ----
thread 'sequence_compound' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- sequence_compound_nested stdout ----
thread 'sequence_compound_nested' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- sequence_non_atomic stdout ----
thread 'sequence_non_atomic' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- shadowing stdout ----
thread 'shadowing' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- soi_at_start stdout ----
thread 'soi_at_start' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- string stdout ----
thread 'string' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- test_han stdout ----
thread 'test_han' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- test_hangul stdout ----
thread 'test_hangul' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- test_hiragana stdout ----
thread 'test_hiragana' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }

---- unicode stdout ----
thread 'unicode' panicked at vm\tests\grammar.rs:22:61:
called `Result::unwrap()` on an `Err` value: Error { variant: ParsingError { positives: [EOI, grammar_rule, grammar_doc], negatives: [] }, location: Pos(0), line_col: Pos((1, 1)), path: None, line: "../../derive/tests/grammar.pest", continued_line: None, parse_attempts: None }


failures:
    arabic
    ascii_alpha_lowers
    ascii_alpha_uppers
    ascii_alphanumerics
    ascii_alphas
    ascii_bin_digits
    ascii_digits
    ascii_hex_digits
    ascii_nonzero_digits
    ascii_oct_digits
    asciis
    checkpoint_restore
    choice_range
    choice_string
    double_neg_pred
    emoji
    ident
    insensitive
    neg_pred
    newline
    optional_empty
    optional_string
    peek
    peek_all
    peek_slice_23
    pop
    pop_all
    pop_fail
    pos_pred
    range
    repeat_atomic_empty
    repeat_atomic_strings
    repeat_comment
    repeat_empty
    repeat_exact
    repeat_max_atomic_once
    repeat_max_atomic_twice
    repeat_max_once
    repeat_max_twice
    repeat_min_atomic_thrice
    repeat_min_atomic_twice
    repeat_min_max_atomic_thrice
    repeat_min_max_atomic_twice
    repeat_min_max_thrice
    repeat_min_max_twice
    repeat_min_thrice
    repeat_min_twice
    repeat_mutate_stack
    repeat_once_atomic_strings
    repeat_once_strings
    repeat_strings
    sequence
    sequence_atomic
    sequence_atomic_compound
    sequence_compound
    sequence_compound_nested
    sequence_non_atomic
    shadowing
    soi_at_start
    string
    test_han
    test_hangul
    test_hiragana
    unicode

test result: FAILED. 13 passed; 64 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s

error: test failed, to rerun pass `-p pest_vm --test grammar`

[tomtau]

I can't reproduce it (on macOS):

$ cargo test -p pest_vm --test grammar
(...)
  Finished `test` profile [unoptimized + debuginfo] target(s) in 5.34s
     Running tests/grammar.rs (target/debug/deps/grammar-39ec5115ffc9ef59)

running 77 tests
test ascii_alphas ... ok
test ascii_bin_digits ... ok
test ascii_hex_digits ... ok
test ascii_alpha_lowers ... ok
test ascii_alpha_uppers ... ok
test arabic ... ok
test ascii_alphanumerics ... ok
test ascii_digits ... ok
test ascii_nonzero_digits ... ok
test asciis ... ok
test checkpoint_restore ... ok
test ascii_oct_digits ... ok
test choice_range ... ok
test choice_string ... ok
test double_neg_pred ... ok
test emoji ... ok
test ident ... ok
test optional_empty ... ok
test optional_string ... ok
test neg_pred ... ok
test insensitive ... ok
test newline ... ok
test peek_all ... ok
test peek_slice_23 ... ok
test peek ... ok
test pop_all ... ok
test pos_pred ... ok
test range ... ok
test pop ... ok
test repeat_atomic_empty ... ok
test pop_fail ... ok
test repeat_empty ... ok
test repeat_atomic_strings ... ok
test repeat_comment ... ok
test repeat_exact ... ok
test repeat_max_atomic_once ... ok
test repeat_max_atomic_space - should panic ... ok
test repeat_atomic_space - should panic ... ok
test repeat_max_atomic_twice ... ok
test repeat_max_once ... ok
test repeat_max_thrice - should panic ... ok
test repeat_max_atomic_thrice - should panic ... ok
test repeat_max_twice ... ok
test repeat_min_atomic_thrice ... ok
test repeat_min_atomic_twice ... ok
test repeat_min_atomic_once - should panic ... ok
test repeat_min_max_atomic_twice ... ok
test repeat_min_max_atomic_thrice ... ok
test repeat_min_atomic_space - should panic ... ok
test repeat_min_max_thrice ... ok
test repeat_min_max_twice ... ok
test repeat_min_max_atomic_space - should panic ... ok
test repeat_min_once - should panic ... ok
test repeat_min_thrice ... ok
test repeat_once_atomic_strings ... ok
test repeat_once_atomic_empty - should panic ... ok
test repeat_min_twice ... ok
test repeat_once_empty - should panic ... ok
test repeat_strings ... ok
test repeat_mutate_stack ... ok
test sequence_atomic_compound ... ok
test repeat_once_atomic_space - should panic ... ok
test sequence ... ok
test sequence_atomic_space - should panic ... ok
test repeat_once_strings ... ok
test sequence_compound_nested ... ok
test sequence_atomic ... ok
test sequence_non_atomic ... ok
test shadowing ... ok
test sequence_compound_nested_space - should panic ... ok
test sequence_compound ... ok
test test_han ... ok
test string ... ok
test test_hangul ... ok
test test_hiragana ... ok
test soi_at_start ... ok
test unicode ... ok

test result: ok. 77 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s

maybe an issue on Windows?