Using dev builds

To use the dev build:

1. Add the generated toolchain to rustup rustup toolchain link <name> $PROJECT_ROOT/build/x86_64-unknown-linux-gnu/stage1
2. Tell rustc which toolchain to use rustc +stage1 ...
3. To print out debug logs (debug!), set the RUSTC_LOG environment variable

Eg:

# Create toolchain under the name "stage1"
% rustup toolchain link stage1 build/x86_64-unknown-linux-gnu/stage1

% cd ~/my_test_suite

# Use the stage1 toolchain
% rustc +stage1 drop_move.rs

# Debug print everything in librustc_infer
% RUSTC_LOG=rustc_infer rustc +stage1 drop_move.rs

# More precise debug printing librustc_infer
% RUSTC_LOG=rustc_infer::infer rustc +stage1 drop_move.rs

# Even more precise debug printing librustc_infer
% RUSTC_LOG=rustc_infer::infer::error_reporting rustc +stage1 drop_move.rs