[INFO] updating cached repository https://github.com/hajifkd/custom-rustc
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2cda9e472047c66cc8ac8d5e4977790026870f9b
[INFO] testing hajifkd/custom-rustc against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhajifkd%2Fcustom-rustc" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hajifkd/custom-rustc on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/hajifkd/custom-rustc
[INFO] finished tweaking git repo https://github.com/hajifkd/custom-rustc
[INFO] tweaked toml for git repo https://github.com/hajifkd/custom-rustc written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/hajifkd/custom-rustc already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] c516cfd0a8990071785986e4fee073a12819f0518c56e6d765892a14b6216de4
[INFO] running `"docker" "start" "-a" "c516cfd0a8990071785986e4fee073a12819f0518c56e6d765892a14b6216de4"`
[INFO] [stderr]    Compiling custom-rustc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `rustc_driver::driver`
[INFO] [stderr]  --> src/main.rs:9:19
[INFO] [stderr]   |
[INFO] [stderr] 9 | use rustc_driver::driver::{CompileController, CompileState};
[INFO] [stderr]   |                   ^^^^^^ could not find `driver` in `rustc_driver`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rustc_driver::CompilerCalls`
[INFO] [stderr]   --> src/main.rs:10:47
[INFO] [stderr]    |
[INFO] [stderr] 10 | use rustc_driver::{run_compiler, Compilation, CompilerCalls};
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^ no `CompilerCalls` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(rustc_private)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `custom-rustc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c516cfd0a8990071785986e4fee073a12819f0518c56e6d765892a14b6216de4"`
[INFO] running `"docker" "rm" "-f" "c516cfd0a8990071785986e4fee073a12819f0518c56e6d765892a14b6216de4"`
[INFO] [stdout] c516cfd0a8990071785986e4fee073a12819f0518c56e6d765892a14b6216de4