[INFO] crate olaf2 0.0.3 is already in cache
[INFO] extracting crate olaf2 0.0.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/olaf2/0.0.3
[INFO] extracting crate olaf2 0.0.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/olaf2/0.0.3
[INFO] validating manifest of olaf2-0.0.3 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 olaf2-0.0.3 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 olaf2-0.0.3
[INFO] finished frobbing olaf2-0.0.3
[INFO] frobbed toml for olaf2-0.0.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/olaf2/0.0.3/Cargo.toml
[INFO] started frobbing olaf2-0.0.3
[INFO] finished frobbing olaf2-0.0.3
[INFO] frobbed toml for olaf2-0.0.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/olaf2/0.0.3/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing olaf2-0.0.3 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/reg/olaf2/0.0.3:/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] e81e626add4e45100e9d2b3ab12e059c7760ddf8b3f20253ffc4fe7d73a5918a
[INFO] running `"docker" "start" "-a" "e81e626add4e45100e9d2b3ab12e059c7760ddf8b3f20253ffc4fe7d73a5918a"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr]    Compiling canonical-path v0.1.1
[INFO] [stderr]    Compiling open v1.3.2
[INFO] [stderr]    Compiling isatty v0.1.9
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling flate2 v1.0.11
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling actix_derive v0.3.2
[INFO] [stderr]    Compiling v_escape_derive v0.5.5
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling curl v0.4.22
[INFO] [stderr]    Compiling publicsuffix v1.5.2
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling chrono v0.4.7
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling serde_qs v0.4.6
[INFO] [stderr]    Compiling url_serde v0.2.0
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-signal v0.2.7
[INFO] [stderr]    Compiling oauth2 v2.0.0-beta.3
[INFO] [stderr]    Compiling v_escape v0.7.4
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling trust-dns-proto v0.6.3
[INFO] [stderr]    Compiling trust-dns-proto v0.5.0
[INFO] [stderr]    Compiling v_htmlescape v0.4.5
[INFO] [stderr]    Compiling simplelog v0.5.3
[INFO] [stderr]    Compiling hyper v0.12.33
[INFO] [stderr]    Compiling abscissa_derive v0.0.2
[INFO] [stderr]    Compiling abscissa v0.0.4
[INFO] [stderr]    Compiling trust-dns-resolver v0.10.3
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling reqwest v0.9.20
[INFO] [stderr]    Compiling actix v0.7.9
[INFO] [stderr]    Compiling actix-net v0.2.6
[INFO] [stderr]    Compiling actix-web v0.7.19
[INFO] [stderr]    Compiling olaf2 v0.0.3 (/opt/crater/workdir)
[INFO] [stderr] error[E0252]: the name `Serialize` is defined multiple times
[INFO] [stderr]  --> src/msgs.rs:3:33
[INFO] [stderr]   |
[INFO] [stderr] 2 | use serde::{de::DeserializeOwned, Serialize};
[INFO] [stderr]   |                                   --------- previous import of the macro `Serialize` here
[INFO] [stderr] 3 | use serde_derive::{Deserialize, Serialize};
[INFO] [stderr]   |                                 ^^^^^^^^^ `Serialize` reimported here
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Serialize` must be defined only once in the macro namespace of this module
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `actix_web::server::Server`
[INFO] [stderr]   --> src/client.rs:14:20
[INFO] [stderr]    |
[INFO] [stderr] 14 |     server::{self, Server},
[INFO] [stderr]    |                    ^^^^^^ no `Server` in `server`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]    --> src/lib.rs:151:1
[INFO] [stderr]     |
[INFO] [stderr] 151 | #![feature(uniform_paths)]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `lazy_static::lazy_static`
[INFO] [stderr]   --> src/client.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use lazy_static::lazy_static;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `serde_derive::Deserialize`
[INFO] [stderr]   --> src/client.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 | use serde_derive::Deserialize;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::util::*`
[INFO] [stderr]   --> src/client.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | use crate::util::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `de::DeserializeOwned`
[INFO] [stderr]  --> src/msgs.rs:2:13
[INFO] [stderr]   |
[INFO] [stderr] 2 | use serde::{de::DeserializeOwned, Serialize};
[INFO] [stderr]   |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Serialize`
[INFO] [stderr]  --> src/msgs.rs:3:33
[INFO] [stderr]   |
[INFO] [stderr] 3 | use serde_derive::{Deserialize, Serialize};
[INFO] [stderr]   |                                 ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Debug`
[INFO] [stderr]  --> src/msgs.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::fmt::Debug;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0252, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0252`.
[INFO] [stderr] error: Could not compile `olaf2`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e81e626add4e45100e9d2b3ab12e059c7760ddf8b3f20253ffc4fe7d73a5918a"`
[INFO] running `"docker" "rm" "-f" "e81e626add4e45100e9d2b3ab12e059c7760ddf8b3f20253ffc4fe7d73a5918a"`
[INFO] [stdout] e81e626add4e45100e9d2b3ab12e059c7760ddf8b3f20253ffc4fe7d73a5918a