[INFO] crate icefall 0.1.0 is already in cache
[INFO] extracting crate icefall 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/icefall/0.1.0
[INFO] extracting crate icefall 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/icefall/0.1.0
[INFO] validating manifest of icefall-0.1.0 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 icefall-0.1.0 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 icefall-0.1.0
[INFO] removed 0 missing tests
[INFO] finished frobbing icefall-0.1.0
[INFO] frobbed toml for icefall-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/icefall/0.1.0/Cargo.toml
[INFO] started frobbing icefall-0.1.0
[INFO] removed 0 missing tests
[INFO] finished frobbing icefall-0.1.0
[INFO] frobbed toml for icefall-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/icefall/0.1.0/Cargo.toml
[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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing icefall-0.1.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/icefall/0.1.0:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 6f211754e860c29f065865f24383460635fe171764e5d34b832ab5c0def9159e
[INFO] running `"docker" "start" "-a" "6f211754e860c29f065865f24383460635fe171764e5d34b832ab5c0def9159e"`
[INFO] [stderr]    Compiling icefall v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/log.rs:319:13
[INFO] [stderr]     |
[INFO] [stderr] 319 |         let mut out_buf = unsafe { (*self.buf.get()).as_mut_slice() };
[INFO] [stderr]     |             ----^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `"docker" "inspect" "6f211754e860c29f065865f24383460635fe171764e5d34b832ab5c0def9159e"`
[INFO] running `"docker" "rm" "-f" "6f211754e860c29f065865f24383460635fe171764e5d34b832ab5c0def9159e"`
[INFO] [stdout] 6f211754e860c29f065865f24383460635fe171764e5d34b832ab5c0def9159e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/icefall/0.1.0:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3a0f32a1313aeadc8b18d93a99f201c0483f1ec443b655f44fd686e84ce7d412
[INFO] running `"docker" "start" "-a" "3a0f32a1313aeadc8b18d93a99f201c0483f1ec443b655f44fd686e84ce7d412"`
[INFO] [stderr]    Compiling quickcheck v0.2.27
[INFO] [stderr]    Compiling icefall v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `rsdb`
[INFO] [stderr]  --> test/test.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | extern crate rsdb;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `icefall`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/log.rs:319:13
[INFO] [stderr]     |
[INFO] [stderr] 319 |         let mut out_buf = unsafe { (*self.buf.get()).as_mut_slice() };
[INFO] [stderr]     |             ----^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3a0f32a1313aeadc8b18d93a99f201c0483f1ec443b655f44fd686e84ce7d412"`
[INFO] running `"docker" "rm" "-f" "3a0f32a1313aeadc8b18d93a99f201c0483f1ec443b655f44fd686e84ce7d412"`
[INFO] [stdout] 3a0f32a1313aeadc8b18d93a99f201c0483f1ec443b655f44fd686e84ce7d412