[INFO] updating cached repository tl8roy/stm32f302r8_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tl8roy/stm32f302r8_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tl8roy/stm32f302r8_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/tl8roy/stm32f302r8_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tl8roy/stm32f302r8_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tl8roy/stm32f302r8_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tl8roy/stm32f302r8_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tl8roy/stm32f302r8_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0b2e694ce6d6835cca465c215db33f13ac689211
[INFO] sha for GitHub repo tl8roy/stm32f302r8_rust: 0b2e694ce6d6835cca465c215db33f13ac689211
[INFO] validating manifest of tl8roy/stm32f302r8_rust 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 tl8roy/stm32f302r8_rust 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 tl8roy/stm32f302r8_rust
[INFO] finished frobbing tl8roy/stm32f302r8_rust
[INFO] frobbed toml for tl8roy/stm32f302r8_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/tl8roy/stm32f302r8_rust/Cargo.toml
[INFO] started frobbing tl8roy/stm32f302r8_rust
[INFO] finished frobbing tl8roy/stm32f302r8_rust
[INFO] frobbed toml for tl8roy/stm32f302r8_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tl8roy/stm32f302r8_rust/Cargo.toml
[INFO] crate tl8roy/stm32f302r8_rust 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] testing tl8roy/stm32f302r8_rust 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tl8roy/stm32f302r8_rust:/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] cfc71f158aa1ad82ebe4fa052d43142ef8714b0a7fa9ae239025389638447a98
[INFO] running `"docker" "start" "-a" "cfc71f158aa1ad82ebe4fa052d43142ef8714b0a7fa9ae239025389638447a98"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.28
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.6.0
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr] error[E0463]: can't find crate for `core`
[INFO] [stderr]   |
[INFO] [stderr]   = note: the `thumbv7em-none-eabihf` target may not be installed
[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 `stable_deref_trait`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "cfc71f158aa1ad82ebe4fa052d43142ef8714b0a7fa9ae239025389638447a98"`
[INFO] running `"docker" "rm" "-f" "cfc71f158aa1ad82ebe4fa052d43142ef8714b0a7fa9ae239025389638447a98"`
[INFO] [stdout] cfc71f158aa1ad82ebe4fa052d43142ef8714b0a7fa9ae239025389638447a98