[INFO] updating cached repository tonal-glyph/tgtracker
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tonal-glyph/tgtracker
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tonal-glyph/tgtracker" "work/ex/beta-1.38-1/sources/1.37.0/gh/tonal-glyph/tgtracker"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tonal-glyph/tgtracker'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tonal-glyph/tgtracker" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tonal-glyph/tgtracker"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tonal-glyph/tgtracker'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 57d2159f8b94c111371ff747926f98f5f6486a18
[INFO] sha for GitHub repo tonal-glyph/tgtracker: 57d2159f8b94c111371ff747926f98f5f6486a18
[INFO] validating manifest of tonal-glyph/tgtracker on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tonal-glyph/tgtracker on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tonal-glyph/tgtracker
[INFO] finished frobbing tonal-glyph/tgtracker
[INFO] frobbed toml for tonal-glyph/tgtracker written to work/ex/beta-1.38-1/sources/1.37.0/gh/tonal-glyph/tgtracker/Cargo.toml
[INFO] started frobbing tonal-glyph/tgtracker
[INFO] finished frobbing tonal-glyph/tgtracker
[INFO] frobbed toml for tonal-glyph/tgtracker written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tonal-glyph/tgtracker/Cargo.toml
[INFO] crate tonal-glyph/tgtracker already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing tonal-glyph/tgtracker against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tonal-glyph/tgtracker:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 486b4b3e7517a1b3818d421d426d3b60c201e30dc2848da03fd4ba9895258ad7
[INFO] running `"docker" "start" "-a" "486b4b3e7517a1b3818d421d426d3b60c201e30dc2848da03fd4ba9895258ad7"`
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling bindgen v0.49.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling pathdiff v0.1.0
[INFO] [stderr]    Compiling instant v0.1.1
[INFO] [stderr]    Compiling transpose v0.1.0
[INFO] [stderr]    Compiling strength_reduce v0.2.1
[INFO] [stderr]    Compiling sample v0.6.2
[INFO] [stderr]    Compiling memalloc v0.1.0
[INFO] [stderr]    Compiling sample v0.10.0
[INFO] [stderr]    Compiling rb v0.3.2
[INFO] [stderr]    Compiling ttf-noto-sans v0.1.1
[INFO] [stderr]    Compiling pitch v0.1.3
[INFO] [stderr]    Compiling conrod_winit v0.64.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]    Compiling rlua v0.16.2
[INFO] [stderr]    Compiling clang-sys v0.28.0
[INFO] [stderr]    Compiling tokio-sync v0.1.5
[INFO] [stderr]    Compiling actix-service v0.4.0
[INFO] [stderr]    Compiling x11 v2.18.1
[INFO] [stderr]    Compiling device_query v0.1.3
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling daggy v0.5.0
[INFO] [stderr]    Compiling hostname v0.1.5
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling socket2 v0.3.9
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling signal-hook-registry v1.0.1
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr]    Compiling rosc v0.1.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling gl_generator v0.10.0
[INFO] [stderr]    Compiling serde_bytes v0.11.1
[INFO] [stderr]    Compiling serde_osc v0.4.2
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_osc-0.4.2/src/lib.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | #![feature(try_from)]
[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 `serde_osc`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "486b4b3e7517a1b3818d421d426d3b60c201e30dc2848da03fd4ba9895258ad7"`
[INFO] running `"docker" "rm" "-f" "486b4b3e7517a1b3818d421d426d3b60c201e30dc2848da03fd4ba9895258ad7"`
[INFO] [stdout] 486b4b3e7517a1b3818d421d426d3b60c201e30dc2848da03fd4ba9895258ad7