[INFO] crate bulletproofs 1.0.2 is already in cache
[INFO] extracting crate bulletproofs 1.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/bulletproofs/1.0.2
[INFO] extracting crate bulletproofs 1.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bulletproofs/1.0.2
[INFO] validating manifest of bulletproofs-1.0.2 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 bulletproofs-1.0.2 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 bulletproofs-1.0.2
[INFO] removed 2 missing tests
[INFO] finished frobbing bulletproofs-1.0.2
[INFO] frobbed toml for bulletproofs-1.0.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/bulletproofs/1.0.2/Cargo.toml
[INFO] started frobbing bulletproofs-1.0.2
[INFO] removed 2 missing tests
[INFO] finished frobbing bulletproofs-1.0.2
[INFO] frobbed toml for bulletproofs-1.0.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bulletproofs/1.0.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 bulletproofs-1.0.2 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bulletproofs/1.0.2:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] ca02a14b880839cac5a13a370ddf786e414551579b9b98a455a519f45b31399e
[INFO] running `"docker" "start" "-a" "ca02a14b880839cac5a13a370ddf786e414551579b9b98a455a519f45b31399e"`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/tests/r1cs.rs
[INFO] [stderr] * /opt/crater/workdir/tests/range_proof.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling subtle v2.1.1
[INFO] [stderr]    Compiling merlin v1.2.0
[INFO] [stderr]    Compiling sha3 v0.8.2
[INFO] [stderr]    Compiling curve25519-dalek v1.2.3
[INFO] [stderr]    Compiling bulletproofs v1.0.2 (/opt/crater/workdir)
[INFO] [stderr] error: couldn't read src/range_proof/../docs/range-proof-protocol.md: No such file or directory (os error 2)
[INFO] [stderr]  --> src/range_proof/mod.rs:2:18
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![doc(include = "../docs/range-proof-protocol.md")]
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(nll)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(external_doc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(try_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `bulletproofs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ca02a14b880839cac5a13a370ddf786e414551579b9b98a455a519f45b31399e"`
[INFO] running `"docker" "rm" "-f" "ca02a14b880839cac5a13a370ddf786e414551579b9b98a455a519f45b31399e"`
[INFO] [stdout] ca02a14b880839cac5a13a370ddf786e414551579b9b98a455a519f45b31399e