[INFO] updating cached repository vi/netmeasure2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vi/netmeasure2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vi/netmeasure2" "work/ex/beta-1.37-6/sources/1.36.0/gh/vi/netmeasure2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/vi/netmeasure2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vi/netmeasure2" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vi/netmeasure2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vi/netmeasure2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d6f64fe96180263f086404d1f3bceabf440a6a3b
[INFO] sha for GitHub repo vi/netmeasure2: d6f64fe96180263f086404d1f3bceabf440a6a3b
[INFO] validating manifest of vi/netmeasure2 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 vi/netmeasure2 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 vi/netmeasure2
[INFO] removed workspace from vi/netmeasure2
[INFO] finished frobbing vi/netmeasure2
[INFO] frobbed toml for vi/netmeasure2 written to work/ex/beta-1.37-6/sources/1.36.0/gh/vi/netmeasure2/Cargo.toml
[INFO] started frobbing vi/netmeasure2
[INFO] removed workspace from vi/netmeasure2
[INFO] finished frobbing vi/netmeasure2
[INFO] frobbed toml for vi/netmeasure2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vi/netmeasure2/Cargo.toml
[INFO] crate vi/netmeasure2 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/vi/netmeasure2/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[INFO] the lockfile is outdated, regenerating it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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 vi/netmeasure2 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-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/vi/netmeasure2:/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] 5327401ca30ac0702738047b51a5b57a19b11a4051dbda3a77c287815e6f62ae
[INFO] running `"docker" "start" "-a" "5327401ca30ac0702738047b51a5b57a19b11a4051dbda3a77c287815e6f62ae"`
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling macro-attr v0.2.0
[INFO] [stderr]    Compiling counted-array v0.1.2
[INFO] [stderr]    Compiling spin_sleep v0.3.7
[INFO] [stderr]    Compiling strum v0.15.0
[INFO] [stderr]    Compiling static_assertions v0.3.3
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling enum-unitary v0.3.6
[INFO] [stderr]    Compiling structopt v0.2.18
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling serde_cbor v0.9.0
[INFO] [stderr]    Compiling netmeasure2 v0.2.0 (/opt/crater/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(const_slice_len)]
[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(vec_resize_default)]
[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(try_blocks)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(nll)]
[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 `netmeasure2`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5327401ca30ac0702738047b51a5b57a19b11a4051dbda3a77c287815e6f62ae"`
[INFO] running `"docker" "rm" "-f" "5327401ca30ac0702738047b51a5b57a19b11a4051dbda3a77c287815e6f62ae"`
[INFO] [stdout] 5327401ca30ac0702738047b51a5b57a19b11a4051dbda3a77c287815e6f62ae