# Rust toolchain pin for the vendored SilentDragonXLite (SDXL) backend.
#
# The pinned librustzcash + transitive crates (notably traitobject 0.1.0) rely on
# pre-1.70 trait-coherence rules and fail to compile on newer rustc with
#   error[E0119]: conflicting implementations of trait `Trait` for type `(dyn Send + Sync)`
# so the backend must be built with 1.63 (the toolchain scripts/build-lite-backend-artifact.sh
# and CLAUDE.md target). rustup auto-selects this when cargo runs in this tree, so no
# RUSTUP_TOOLCHAIN / `cargo +1.63.0` is needed.
#
# Install it once with:  rustup toolchain install 1.63.0
[toolchain]
channel = "1.63.0"