Name Resolution

Fix E0710: Unstable Name Lookup in Extern Crate Declaration

Rust intermediate Linux macOS Windows WebAssembly Aug 4, 2026

Rust compiler error E0710 occurs when an extern crate declaration uses unstable name resolution features that are only available on nightly Rust.

Fix E0210: Type Name is Reserved as a Foreign Type Name

Rust intermediate Linux macOS Windows WebAssembly Jul 25, 2026

Rust compiler error E0210 occurs when attempting to define a type with a name that is reserved for foreign type bindings in the C ABI.

Fix go-undefined-name: Resolve 'undefined: name not found' errors in Go

Go intermediate Go Runtime Go Compiler Jul 3, 2026

Understand and resolve the 'undefined: name not found' error in Go, which indicates an identifier is used without proper declaration or import within its scope.

Fix NameError: Python undefined name resolution at runtime

Python beginner All platforms (Windows, macOS, Linux) Python 3.x Python 2.7 (legacy) Jun 13, 2026

NameError occurs when Python encounters an undefined name during execution, indicating a variable, function, or class has not been defined or imported.