[INFO] updating cached repository https://github.com/jacobrosenthal/rust-ffi-bench
[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] e85828968a52a6415b19ea2b37f404f2f25ea8f2
[INFO] testing jacobrosenthal/rust-ffi-bench against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacobrosenthal%2Frust-ffi-bench" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jacobrosenthal/rust-ffi-bench 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/jacobrosenthal/rust-ffi-bench
[INFO] finished tweaking git repo https://github.com/jacobrosenthal/rust-ffi-bench
[INFO] tweaked toml for git repo https://github.com/jacobrosenthal/rust-ffi-bench written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/jacobrosenthal/rust-ffi-bench 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-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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] ac08d0001f7dadb09692c5907342cac892b0d95597beb9699ba4b7acb9472f60
[INFO] running `"docker" "start" "-a" "ac08d0001f7dadb09692c5907342cac892b0d95597beb9699ba4b7acb9472f60"`
[INFO] [stderr]    Compiling encoding_index_tests v0.1.5 (https://github.com/lifthrasiir/rust-encoding#eb3d3c30)
[INFO] [stderr]    Compiling encoding-types v0.2.0 (https://github.com/lifthrasiir/rust-encoding#eb3d3c30)
[INFO] [stderr]    Compiling encoding-index-tradchinese v1.20141219.6 (https://github.com/lifthrasiir/rust-encoding#eb3d3c30)
[INFO] [stderr]    Compiling encoding-index-simpchinese v1.20160120.0 (https://github.com/lifthrasiir/rust-encoding#eb3d3c30)
[INFO] [stderr]    Compiling encoding-index-singlebyte v1.20160120.0 (https://github.com/lifthrasiir/rust-encoding#eb3d3c30)
[INFO] [stderr]    Compiling encoding-index-japanese v1.20141219.6 (https://github.com/lifthrasiir/rust-encoding#eb3d3c30)
[INFO] [stderr]    Compiling encoding-index-korean v1.20141219.6 (https://github.com/lifthrasiir/rust-encoding#eb3d3c30)
[INFO] [stderr]    Compiling encoding v0.3.0-dev (https://github.com/lifthrasiir/rust-encoding#eb3d3c30)
[INFO] [stderr]    Compiling ffi-bench v0.1.0 (/opt/rustwide/workdir)
[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(uniform_paths)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(unsized_locals)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `ffi-bench`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ac08d0001f7dadb09692c5907342cac892b0d95597beb9699ba4b7acb9472f60"`
[INFO] running `"docker" "rm" "-f" "ac08d0001f7dadb09692c5907342cac892b0d95597beb9699ba4b7acb9472f60"`
[INFO] [stdout] ac08d0001f7dadb09692c5907342cac892b0d95597beb9699ba4b7acb9472f60