[INFO] updating cached repository pandaman64/lisp
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pandaman64/lisp
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pandaman64/lisp" "work/ex/beta-1.38-1/sources/1.37.0/gh/pandaman64/lisp"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/pandaman64/lisp'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pandaman64/lisp" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pandaman64/lisp"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pandaman64/lisp'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 46d4a4314a759b1c14e983bb0cd0ad1710407ca1
[INFO] sha for GitHub repo pandaman64/lisp: 46d4a4314a759b1c14e983bb0cd0ad1710407ca1
[INFO] validating manifest of pandaman64/lisp 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 pandaman64/lisp 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 pandaman64/lisp
[INFO] finished frobbing pandaman64/lisp
[INFO] frobbed toml for pandaman64/lisp written to work/ex/beta-1.38-1/sources/1.37.0/gh/pandaman64/lisp/Cargo.toml
[INFO] started frobbing pandaman64/lisp
[INFO] finished frobbing pandaman64/lisp
[INFO] frobbed toml for pandaman64/lisp written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pandaman64/lisp/Cargo.toml
[INFO] crate pandaman64/lisp 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 pandaman64/lisp 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/pandaman64/lisp:/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] bc5fff17803e18eb032d681a85972c4fa13fd2e32e30129941511e72a2461de8
[INFO] running `"docker" "start" "-a" "bc5fff17803e18eb032d681a85972c4fa13fd2e32e30129941511e72a2461de8"`
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling ascii v0.9.1
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling combine v3.6.2
[INFO] [stderr]    Compiling scheme v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(generators, generator_trait, nll)]
[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 `scheme`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bc5fff17803e18eb032d681a85972c4fa13fd2e32e30129941511e72a2461de8"`
[INFO] running `"docker" "rm" "-f" "bc5fff17803e18eb032d681a85972c4fa13fd2e32e30129941511e72a2461de8"`
[INFO] [stdout] bc5fff17803e18eb032d681a85972c4fa13fd2e32e30129941511e72a2461de8