[INFO] updating cached repository https://github.com/Schaeff/zokrates_web_prover
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 243f9539b88e414dd7421210578a71f13b7133db
[INFO] testing Schaeff/zokrates_web_prover against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FSchaeff%2Fzokrates_web_prover" "work/builds/worker-8/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Schaeff/zokrates_web_prover on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Schaeff/zokrates_web_prover
[INFO] finished tweaking git repo https://github.com/Schaeff/zokrates_web_prover
[INFO] tweaked toml for git repo https://github.com/Schaeff/zokrates_web_prover written to work/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Schaeff/zokrates_web_prover already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 7b4991514dcffc27ff553623b26f6d69cbccfd63d3c7c21735aece2a97b1eaeb
[INFO] running `"docker" "start" "-a" "7b4991514dcffc27ff553623b26f6d69cbccfd63d3c7c21735aece2a97b1eaeb"`
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.46
[INFO] [stderr]    Compiling bumpalo v2.4.3
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling wasm-bindgen v0.2.46
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling memory_units v0.3.0
[INFO] [stderr]    Compiling zokrates_core v0.3.12 (https://github.com/ZoKrates/ZoKrates/?branch=wasm-prover#50942ecf)
[INFO] [stderr]    Compiling rustc-hex v1.0.0
[INFO] [stderr]    Compiling reduce v0.1.2
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling regex-automata v0.1.7
[INFO] [stderr]    Compiling parity-wasm v0.31.3
[INFO] [stderr]    Compiling parity-wasm v0.35.7
[INFO] [stderr]    Compiling serde_bytes v0.10.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.30
[INFO] [stderr]    Compiling blake2-rfc_bellman_edition v0.0.1
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling pest v2.1.1
[INFO] [stderr]    Compiling backtrace v0.3.32
[INFO] [stderr]    Compiling bincode v0.8.0
[INFO] [stderr]    Compiling tiny-keccak v1.5.0
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling csv-core v0.1.6
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling bstr v0.2.1
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling pest_meta v2.1.1
[INFO] [stderr]    Compiling from-pest v0.3.1
[INFO] [stderr]    Compiling wasmi-validation v0.1.0
[INFO] [stderr]    Compiling csv v1.1.0
[INFO] [stderr]    Compiling weedle v0.9.0
[INFO] [stderr]    Compiling wasmi v0.4.5
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.46
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.46
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling zokrates_parser v0.1.1 (https://github.com/ZoKrates/ZoKrates/?branch=wasm-prover#50942ecf)
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.46
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.46
[INFO] [stderr]    Compiling single v1.0.0
[INFO] [stderr]    Compiling pest-ast v0.3.3
[INFO] [stderr]    Compiling js-sys v0.3.23
[INFO] [stderr]    Compiling console_error_panic_hook v0.1.6
[INFO] [stderr]    Compiling ff_derive_ce v0.4.0
[INFO] [stderr]    Compiling web-sys v0.3.23
[INFO] [stderr]    Compiling ff_ce v0.6.0
[INFO] [stderr]    Compiling pairing_ce v0.17.0
[INFO] [stderr]    Compiling zokrates_field v0.3.3 (https://github.com/ZoKrates/ZoKrates/?branch=wasm-prover#50942ecf)
[INFO] [stderr]    Compiling zokrates_pest_ast v0.1.1 (https://github.com/ZoKrates/ZoKrates/?branch=wasm-prover#50942ecf)
[INFO] [stderr]    Compiling bellman_ce v0.3.0
[INFO] [stderr]    Compiling sapling-crypto_ce v0.0.5
[INFO] [stderr]    Compiling zokrates_embed v0.1.0 (https://github.com/ZoKrates/ZoKrates/?branch=wasm-prover#50942ecf)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/zokrates-bc4b6b685c9dd735/50942ec/zokrates_core/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_patterns, box_syntax)]
[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 `zokrates_core`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7b4991514dcffc27ff553623b26f6d69cbccfd63d3c7c21735aece2a97b1eaeb"`
[INFO] running `"docker" "rm" "-f" "7b4991514dcffc27ff553623b26f6d69cbccfd63d3c7c21735aece2a97b1eaeb"`
[INFO] [stdout] 7b4991514dcffc27ff553623b26f6d69cbccfd63d3c7c21735aece2a97b1eaeb