# Pinned toolchain — this workspace only builds inside a NARROW rustc band.
#
# Established empirically 2026-07-28 in a clean Debian 13 container:
#
#   rustc 1.85.0  (what `apt install rustc` gives on Debian trixie)
#       -> FAILS: "rustc 1.85.0 is not supported by the following packages"
#          aws-config, aws-sdk-*, aws-smithy-* all require >= 1.91.1
#
#   rustc 1.97.1  (what `rustup default stable` gives today)
#       -> FAILS: ethnum, error[E0512] "cannot transmute between types of
#          different sizes, or dependently-sized types"
#
#   rustc 1.94.0  -> builds clean (2m39s, workspace, exit 0)
#
# So BOTH obvious reviewer paths break: distro rustc is too old, rustup stable
# is too new. Without this pin the build reproduced on our host only because the
# toolchain happened to be restored from the previous machine. Pinning makes it
# reproducible by construction rather than by accident.
#
# Native prerequisites (also verified in the clean container, minimal set):
#   protobuf-compiler   -- lance-encoding / lance-file build scripts need protoc
#   pkg-config
#   libssl-dev
# NOT required, despite being installed on the dev host: cmake, clang, libclang-dev.
[toolchain]
channel = "1.94.0"
profile = "minimal"