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SIFR-RUST-TRUST-0001 belongs to the Rust interop trust diagnostic family. It means: rust interop trust declaration is missing.

Why It Happens

A Rust interop dependency or item is blocked by trust policy. Declare trust explicitly for the required Rust surface.
Use sifr --explain SIFR-RUST-TRUST-0001 locally to see the renderer’s exact message template and any machine-applicable suggestions for the compiler version you are running.

Details

See the Error Codes index for the complete catalog.