Panic in Parser::nth(): "the parser seems stuck"

[djc]

Backtrace:

thread 'Worker' panicked at 'the parser seems stuck', crates/parser/src/parser.rs:55:9
stack backtrace:
   0: _rust_begin_unwind
   1: core::panicking::panic_fmt
   2: parser::parser::Parser::nth
   3: parser::grammar::expressions::expr_bp
   4: parser::grammar::expressions::arg_list
   5: parser::grammar::expressions::expr_bp
   6: parser::grammar::expressions::atom::array_expr
   7: parser::grammar::expressions::atom::atom_expr
   8: parser::grammar::expressions::expr_bp
   9: parser::grammar::expressions::expr_bp
  10: parser::grammar::expressions::atom::tuple_expr
  11: parser::grammar::expressions::atom::atom_expr
  12: parser::grammar::expressions::expr_bp
  13: parser::grammar::expressions::atom::array_expr
  14: parser::grammar::expressions::atom::atom_expr
  15: parser::grammar::expressions::expr_bp
  16: parser::grammar::expressions::expr_bp
  17: parser::grammar::expressions::arg_list
  18: parser::grammar::expressions::expr_bp
  19: parser::grammar::expressions::record_expr_field_list
  20: parser::grammar::expressions::path_expr
  21: parser::grammar::expressions::atom::atom_expr
  22: parser::grammar::expressions::expr_bp
  23: parser::grammar::items::consts::const_or_static
  24: parser::grammar::items::opt_item
  25: parser::grammar::items::item_or_macro
  26: parser::grammar::items::mod_contents
  27: parser::grammar::entry::top::macro_items
  28: mbe::syntax_bridge::token_tree_to_syntax_node
  29: <hir_expand::db::ParseMacroExpansionQuery as salsa::plumbing::QueryFunction>::execute
  30: salsa::runtime::Runtime::execute_query_implementation
  31: salsa::derived::slot::Slot<Q,MP>::read_upgrade
  32: salsa::derived::slot::Slot<Q,MP>::read
  33: <salsa::derived::DerivedStorage<Q,MP> as salsa::plumbing::QueryStorageOps<Q>>::try_fetch
  34: <DB as hir_expand::db::AstDatabase>::parse_macro_expansion::__shim
  35: hir_expand::db::parse_or_expand
  36: hir_def::item_tree::ItemTree::file_item_tree_query
  37: salsa::runtime::Runtime::execute_query_implementation
  38: salsa::derived::slot::Slot<Q,MP>::read_upgrade
  39: salsa::derived::slot::Slot<Q,MP>::read
  40: <salsa::derived::DerivedStorage<Q,MP> as salsa::plumbing::QueryStorageOps<Q>>::try_fetch
  41: <DB as hir_def::db::DefDatabase>::file_item_tree::__shim
  42: hir_def::nameres::collector::DefCollector::collect_macro_expansion
  43: hir_def::nameres::collector::ModCollector::collect
  44: hir_def::nameres::collector::collect_defs
  45: hir_def::nameres::DefMap::crate_def_map_query
  46: salsa::runtime::Runtime::execute_query_implementation
  47: salsa::derived::slot::Slot<Q,MP>::read_upgrade
  48: salsa::derived::slot::Slot<Q,MP>::read
  49: <salsa::derived::DerivedStorage<Q,MP> as salsa::plumbing::QueryStorageOps<Q>>::try_fetch
  50: <DB as hir_def::db::DefDatabase>::crate_def_map_query::__shim
  51: hir_def::db::crate_def_map_wait
  52: hir_def::nameres::collector::collect_defs
  53: hir_def::nameres::DefMap::crate_def_map_query
  54: salsa::runtime::Runtime::execute_query_implementation
  55: salsa::derived::slot::Slot<Q,MP>::read_upgrade
  56: salsa::derived::slot::Slot<Q,MP>::read
  57: <salsa::derived::DerivedStorage<Q,MP> as salsa::plumbing::QueryStorageOps<Q>>::try_fetch
  58: <DB as hir_def::db::DefDatabase>::crate_def_map_query::__shim
  59: hir_def::db::crate_def_map_wait
  60: hir_def::nameres::collector::collect_defs
  61: hir_def::nameres::DefMap::crate_def_map_query
  62: salsa::runtime::Runtime::execute_query_implementation
  63: salsa::derived::slot::Slot<Q,MP>::read_upgrade
  64: salsa::derived::slot::Slot<Q,MP>::read
  65: <salsa::derived::DerivedStorage<Q,MP> as salsa::plumbing::QueryStorageOps<Q>>::try_fetch
  66: <DB as hir_def::db::DefDatabase>::crate_def_map_query::__shim
  67: hir_def::db::crate_def_map_wait
  68: hir_def::nameres::collector::collect_defs
  69: hir_def::nameres::DefMap::crate_def_map_query
  70: salsa::runtime::Runtime::execute_query_implementation
  71: salsa::derived::slot::Slot<Q,MP>::read_upgrade
  72: salsa::derived::slot::Slot<Q,MP>::read
  73: <salsa::derived::DerivedStorage<Q,MP> as salsa::plumbing::QueryStorageOps<Q>>::try_fetch
  74: <DB as hir_def::db::DefDatabase>::crate_def_map_query::__shim
  75: hir_def::db::crate_def_map_wait
  76: hir::semantics::source_to_def::SourceToDefCtx::file_to_def
  77: hir::semantics::source_to_def::SourceToDefCtx::find_container
  78: hir::semantics::SemanticsImpl::analyze_impl
  79: hir::semantics::SemanticsImpl::scope
  80: ide::inlay_hints::inlay_hints
  81: std::panicking::try
  82: rust_analyzer::handlers::handle_inlay_hints
  83: std::panicking::try
  84: <F as threadpool::FnBox>::call_box

This seems to be in response to the following source code (mentioned in the request: textDocument/codeLens):

use std::fs;

fn main() {
    let model = grapheme_to_phoneme::Model::load_in_memory().expect("should load");
    let dict = fs::read_to_string("/usr/share/dict/words").expect("should read words");
    let words = dict.lines().collect::<Vec<_>>();
    dbg!(&words[..10]);


    //let phonemes = model.predict_phonemes_strs("test").expect("should encode");
    //println!("{:?}", phonemes);
}

#[cfg(test)]
mod tests {
    use grapheme_to_phoneme::Model;

    #[test]
    fn basic() {
        let model = Model::load_in_memory().expect("should load");
        assert_eq!(
            model.predict_phonemes_strs("test").expect("should encode"),
            vec!["T", "EH1", "S", "T"]
                .iter()
                .map(|s| s.to_string())
                .collect::<Vec<String>>()
        );
    }
}

(FWIW, in the terminal Cargo/rustc don't seem to have any issues dealing with this project.)

rust-analyzer version: rust-analyzer version: 0.3.1325-standalone (9ed1829 2022-12-17)
rustc version: rustc 1.66.0 (69f9c33d7 2022-12-12)

[bjorn3]

#13794 might have fixed this. Can you try the latest rust-analyzer version?

[djc]

Yes, 0.4.1327-standalone (761b127 2022-12-20) seems to work. Thanks!