gccrs: Fix ICE when identifier is a lang item

Compiler crash fixed when an identifier mistakenly refers to a language item.

By Philip Herron April 18, 2026 committed

This commit resolves an Internal Compiler Error (ICE) in gccrs that occurred when an identifier was incorrectly treated as a language item. The fix involves adding a check in TokenCollector::visit to correctly handle such cases.

In Details

The gccrs compiler now correctly handles cases where an identifier in the Abstract Syntax Tree (AST) is mistaken for a language item, preventing an ICE. The TokenCollector now explicitly checks for language items during AST traversal.

For Context

Internal Compiler Error (ICE): A severe error within the compiler itself that prevents compilation from completing. It typically indicates a bug in the compiler's internal logic.
language item: Special identifiers in Rust that refer to fundamental language constructs, such as the println! macro or primitive types. The compiler has specific knowledge of these items.
Abstract Syntax Tree (AST): A tree representation of the abstract syntactic structure of source code. It's an intermediate representation used by compilers to analyze and manipulate code.

Filed Under: gccrscompiler error

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