[INFO] updating cached repository ghotiphud/advent-of-code-2017
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ghotiphud/advent-of-code-2017
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ghotiphud/advent-of-code-2017" "work/ex/beta-1.38-1/sources/1.37.0/gh/ghotiphud/advent-of-code-2017"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ghotiphud/advent-of-code-2017'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ghotiphud/advent-of-code-2017" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ghotiphud/advent-of-code-2017"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ghotiphud/advent-of-code-2017'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f76b8efa9658f9b2127ec4c4ff4b9cc8d0887538
[INFO] sha for GitHub repo ghotiphud/advent-of-code-2017: f76b8efa9658f9b2127ec4c4ff4b9cc8d0887538
[INFO] validating manifest of ghotiphud/advent-of-code-2017 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 ghotiphud/advent-of-code-2017 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 ghotiphud/advent-of-code-2017
[INFO] finished frobbing ghotiphud/advent-of-code-2017
[INFO] frobbed toml for ghotiphud/advent-of-code-2017 written to work/ex/beta-1.38-1/sources/1.37.0/gh/ghotiphud/advent-of-code-2017/Cargo.toml
[INFO] started frobbing ghotiphud/advent-of-code-2017
[INFO] finished frobbing ghotiphud/advent-of-code-2017
[INFO] frobbed toml for ghotiphud/advent-of-code-2017 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ghotiphud/advent-of-code-2017/Cargo.toml
[INFO] crate ghotiphud/advent-of-code-2017 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 ghotiphud/advent-of-code-2017 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/ghotiphud/advent-of-code-2017:/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] d670b53be82d3382a089122756ecd79a702cdbb42439dfcf51b3ac998514dbc3
[INFO] running `"docker" "start" "-a" "d670b53be82d3382a089122756ecd79a702cdbb42439dfcf51b3ac998514dbc3"`
[INFO] [stderr]    Compiling libc v0.2.38
[INFO] [stderr]    Compiling compiler_error v0.1.1
[INFO] [stderr]    Compiling gen-iter v0.1.2
[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/gen-iter-0.1.2/src/lib.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | #![feature(generators, generator_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `resume` found for type `T` in the current scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/gen-iter-0.1.2/src/lib.rs:53:22
[INFO] [stderr]    |
[INFO] [stderr] 53 |         match self.0.resume() {
[INFO] [stderr]    |                      ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]    = note: the following trait defines an item `resume`, perhaps you need to implement it:
[INFO] [stderr]            candidate #1: `std::ops::Generator`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `gen-iter`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0432]: unresolved import `syntax::codemap`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/compiler_error-0.1.1/src/lib.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 | use syntax::codemap::Span;
[INFO] [stderr]   |             ^^^^^^^ could not find `codemap` in `syntax`
[INFO] [stderr] 
[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/compiler_error-0.1.1/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(plugin_registrar, rustc_private)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `compiler_error`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d670b53be82d3382a089122756ecd79a702cdbb42439dfcf51b3ac998514dbc3"`
[INFO] running `"docker" "rm" "-f" "d670b53be82d3382a089122756ecd79a702cdbb42439dfcf51b3ac998514dbc3"`
[INFO] [stdout] d670b53be82d3382a089122756ecd79a702cdbb42439dfcf51b3ac998514dbc3