[INFO] updating cached repository OutThisLife/tos-book
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/OutThisLife/tos-book
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/OutThisLife/tos-book" "work/ex/beta-1.38-1/sources/1.37.0/gh/OutThisLife/tos-book"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/OutThisLife/tos-book'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/OutThisLife/tos-book" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/OutThisLife/tos-book"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/OutThisLife/tos-book'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ad3a51e9e8ead0da2b33529991c90ecb3dfc6afa
[INFO] sha for GitHub repo OutThisLife/tos-book: ad3a51e9e8ead0da2b33529991c90ecb3dfc6afa
[INFO] validating manifest of OutThisLife/tos-book 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 OutThisLife/tos-book 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 OutThisLife/tos-book
[INFO] finished frobbing OutThisLife/tos-book
[INFO] frobbed toml for OutThisLife/tos-book written to work/ex/beta-1.38-1/sources/1.37.0/gh/OutThisLife/tos-book/Cargo.toml
[INFO] started frobbing OutThisLife/tos-book
[INFO] finished frobbing OutThisLife/tos-book
[INFO] frobbed toml for OutThisLife/tos-book written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/OutThisLife/tos-book/Cargo.toml
[INFO] crate OutThisLife/tos-book 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 OutThisLife/tos-book 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/OutThisLife/tos-book:/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] 12354449fa92975d1e4f0887a4998b863e9fc4c4c1d6995af69d13496ba731cc
[INFO] running `"docker" "start" "-a" "12354449fa92975d1e4f0887a4998b863e9fc4c4c1d6995af69d13496ba731cc"`
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]    Compiling svg v0.5.12
[INFO] [stderr]    Compiling macro-utils v0.1.2
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling tokio-sync v0.1.3
[INFO] [stderr]    Compiling tokio-executor v0.1.6
[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/literalext-0.1.1/src/lib.rs:19:37
[INFO] [stderr]    |
[INFO] [stderr] 19 | #![cfg_attr(feature = "proc-macro", feature(proc_macro))]
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling minifier v0.0.28
[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 `literalext`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "12354449fa92975d1e4f0887a4998b863e9fc4c4c1d6995af69d13496ba731cc"`
[INFO] running `"docker" "rm" "-f" "12354449fa92975d1e4f0887a4998b863e9fc4c4c1d6995af69d13496ba731cc"`
[INFO] [stdout] 12354449fa92975d1e4f0887a4998b863e9fc4c4c1d6995af69d13496ba731cc