[INFO] updating cached repository featureenvy/rust-embedded
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/featureenvy/rust-embedded
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/featureenvy/rust-embedded" "work/ex/beta-1.37-6/sources/1.36.0/gh/featureenvy/rust-embedded"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/featureenvy/rust-embedded'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/featureenvy/rust-embedded" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/featureenvy/rust-embedded"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/featureenvy/rust-embedded'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 222231c9c41a8a6fea9d48564e9e571405d4fce4
[INFO] sha for GitHub repo featureenvy/rust-embedded: 222231c9c41a8a6fea9d48564e9e571405d4fce4
[INFO] validating manifest of featureenvy/rust-embedded on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of featureenvy/rust-embedded on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing featureenvy/rust-embedded
[INFO] finished frobbing featureenvy/rust-embedded
[INFO] frobbed toml for featureenvy/rust-embedded written to work/ex/beta-1.37-6/sources/1.36.0/gh/featureenvy/rust-embedded/Cargo.toml
[INFO] started frobbing featureenvy/rust-embedded
[INFO] finished frobbing featureenvy/rust-embedded
[INFO] frobbed toml for featureenvy/rust-embedded written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/featureenvy/rust-embedded/Cargo.toml
[INFO] crate featureenvy/rust-embedded already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/featureenvy/rust-embedded/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/hackndev/rlibc`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/hackndev/rlibc`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing featureenvy/rust-embedded against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/featureenvy/rust-embedded:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 4a5cf9efc94ab0af9d794d8cb8367c0d42c8158023694efcfc6ad0720aa3c314
[INFO] running `"docker" "start" "-a" "4a5cf9efc94ab0af9d794d8cb8367c0d42c8158023694efcfc6ad0720aa3c314"`
[INFO] [stderr]    Compiling rust-libcore v0.0.3
[INFO] [stderr]    Compiling rlibc v0.1.4 (https://github.com/hackndev/rlibc?branch=zinc#620489f8)
[INFO] [stderr]    Compiling rust-embedded v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/rlibc-22ab3e9e80121e06/620489f/src/lib.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | #![feature(no_std)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rlibc`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: use of deprecated item 'gcc::Config': gcc::Config has been renamed to gcc::Build
[INFO] [stderr]  --> build.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     gcc::Config::new().compiler("arm-none-eabi-gcc").file("src/LM4F_startup.c").flag("-mthumb").compile("libstartup.a");
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'gcc::Build::new': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stderr]  --> build.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     gcc::Config::new().compiler("arm-none-eabi-gcc").file("src/LM4F_startup.c").flag("-mthumb").compile("libstartup.a");
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4a5cf9efc94ab0af9d794d8cb8367c0d42c8158023694efcfc6ad0720aa3c314"`
[INFO] running `"docker" "rm" "-f" "4a5cf9efc94ab0af9d794d8cb8367c0d42c8158023694efcfc6ad0720aa3c314"`
[INFO] [stdout] 4a5cf9efc94ab0af9d794d8cb8367c0d42c8158023694efcfc6ad0720aa3c314