New Features

  • #7432 Confirm loading untrusted Cargo project. Now when you try to open a Cargo project from an unknown source for the first time, IDE displays a warning to ensure that a project is safe to invoke potentially unsafe tasks:
    • Run external Rust tools (cargo, rustc, rustfmt) that might be overridden to execute arbitrary code
    • Execute build scripts and procedural macros that also can contain arbitrary code

    For more information, follow Project security help page.

    Open a project for the first time Open an existing project

  • #4109 Provide LLDB pretty-printers to render OsStr, CString, CStr, PathBuf, Path std types in IDE debugger

    LLDB pretty-printers

  • #6342 Add completion for trait methods, types, and constants inside impl blocks (by @Kobzol)

  • #6392, #7507, #7461 Add Unused import inspection. The inspection helps you to avoid excessive and duplicating use declarations in your project. Current restrictions:
    • Only checks use declarations inside modules without a child module
    • Disabled by default for now due to possible false-positive warnings. You can enable it via Preferences | Editor | Inspections settings (by @Kobzol)

  • #6664 Substitute generic parameters in Parameter Info (by @Kobzol)

    Parameter info

  • .match postfix template improvements:

    • #7476 Always place caret into the first match arm

    • #7346 Insert .as_str() automatically when matching String (by @Kobzol)

    • #7328 Allow filling patterns after generating match arms (by @Kobzol)

  • Crates local index improvements:

    • #7425 Enable crates local index on the nightly plugin channel by default. This index is aimed to improve completion and code insight related to crate dependencies, mainly affecting Cargo.toml files. If you face any issues, please feel free to provide us with feedback via Help | Create New Issue action right from your IDE

    • #7148 Add New crate version available inspection for Cargo.toml files. This inspection warns about possibly outdated dependency versions (by @Kobzol)

    Note, it requires org.rust.crates.local.index experimental feature

  • #7457 Add completion for items inside visibility restrictions (pub(<...>)) (by @Kobzol)

  • #7345 Support type aliases in Substitute associated type intention (by @Kobzol)

  • #7456 Annotate trailing commas in TOML inline tables as errors

Performance Improvements

  • #7437 Optimize creation of crates local index (by @Kobzol)


  • #7471 Suggest traits in completion only if the path must resolve to a trait (impl <...> for type or T: <...>) (by @Kobzol)

  • #7462 Fix parsing of expressions and statements containing block subexpressions (by @afetisov)

  • #7451 Only complete ancestor mods in visibility restriction paths (pub(in <...>)) (by @Kobzol)

  • #7436 Fix Create struct intention behaviour when invoked from inside an impl block (by @Kobzol)

  • #7415 Fix false-positive error on a multi-line array inside TOML inline table

  • #7392 Fix Move Statement Up/Down action (Ctrl+Shift+Up/Down) on block expressions inside a comma-separated list (by @Kobzol)

  • #7473 Fix Add impl block intention for structures with const generic parameters (by @afetisov)

  • #7474 Fix Create lifetime parameters from usage quick-fix for items with const generic parameters (by @afetisov)

  • #6788 Correctly fill empty function call arguments with Fill missing arguments intention (by @Kobzol)

  • #7403 Fix false-positive Cannot resolve directory warnings on paths with wildcard glob patterns (* or ?) inside workspace section of TOML files (by @Kobzol)

  • #7449 Correctly handle root modules in Promote module to directory refactoring

  • #7189 Use the most recent stdlib in case of multiple libraries in a project containing several Cargo projects

  • #7460 Restore missing icon for TOML files

  • #7427 Reset crates local index state if the index is empty

  • #7513 Temporarily disable proofreading checks from Grazie plugin for Rust language in 2021.2 IDEs

Internal Improvements

  • #7491 Use Kotlin 1.5 for plugin compilation. So now it’s possible to use sealed interfaces and place subclasses of sealed classes in different files. Note, the new stdlib API is still unavailable in the project since the plugin may be launched in IDE with 1.4 runtime

  • #7523 Make 2021.2 platform default for development

  • #7388 Migrate to gradle-intellij-plugin 1.0

Full set of changes can be found here