[INFO] updating cached repository renlulu/rust-merkledag
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/renlulu/rust-merkledag
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/renlulu/rust-merkledag" "work/ex/beta-1.38-1/sources/1.37.0/gh/renlulu/rust-merkledag"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/renlulu/rust-merkledag'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/renlulu/rust-merkledag" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/renlulu/rust-merkledag"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/renlulu/rust-merkledag'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 12821bcd861bacc72c7ff053067ea3e4eb6a79ad
[INFO] sha for GitHub repo renlulu/rust-merkledag: 12821bcd861bacc72c7ff053067ea3e4eb6a79ad
[INFO] validating manifest of renlulu/rust-merkledag 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 renlulu/rust-merkledag 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 renlulu/rust-merkledag
[INFO] finished frobbing renlulu/rust-merkledag
[INFO] frobbed toml for renlulu/rust-merkledag written to work/ex/beta-1.38-1/sources/1.37.0/gh/renlulu/rust-merkledag/Cargo.toml
[INFO] started frobbing renlulu/rust-merkledag
[INFO] finished frobbing renlulu/rust-merkledag
[INFO] frobbed toml for renlulu/rust-merkledag written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/renlulu/rust-merkledag/Cargo.toml
[INFO] crate renlulu/rust-merkledag 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 renlulu/rust-merkledag 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-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/renlulu/rust-merkledag:/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] 9c9d9093a219e34a0f01a10bf08be57f9bcb34703f16042c14e52cf799de333f
[INFO] running `"docker" "start" "-a" "9c9d9093a219e34a0f01a10bf08be57f9bcb34703f16042c14e52cf799de333f"`
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]    Compiling serde v1.0.87
[INFO] [stderr]    Compiling sha1 v0.5.0
[INFO] [stderr]    Compiling protobuf v2.0.6
[INFO] [stderr]    Compiling integer-encoding v1.0.5
[INFO] [stderr]    Compiling multibase v0.6.0
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling tiny-keccak v1.4.2
[INFO] [stderr]    Compiling multihash v0.8.0
[INFO] [stderr]    Compiling multihash v0.8.1-pre (https://github.com/renlulu/rust-multihash#827ede97)
[INFO] [stderr]    Compiling serde_derive v1.0.87
[INFO] [stderr]    Compiling cid v0.3.0 (https://github.com/renlulu/rust-cid.git#c335309c)
[INFO] [stderr]    Compiling merkledag v0.1.0 (/opt/crater/workdir)
[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(uniform_paths)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:209:26
[INFO] [stderr]     |
[INFO] [stderr] 209 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:210:18
[INFO] [stderr]     |
[INFO] [stderr] 210 |         self as &::std::any::Any
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:212:38
[INFO] [stderr]     |
[INFO] [stderr] 212 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:213:22
[INFO] [stderr]     |
[INFO] [stderr] 213 |         self as &mut ::std::any::Any
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:215:55
[INFO] [stderr]     |
[INFO] [stderr] 215 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:440:26
[INFO] [stderr]     |
[INFO] [stderr] 440 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:441:18
[INFO] [stderr]     |
[INFO] [stderr] 441 |         self as &::std::any::Any
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:443:38
[INFO] [stderr]     |
[INFO] [stderr] 443 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:444:22
[INFO] [stderr]     |
[INFO] [stderr] 444 |         self as &mut ::std::any::Any
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/node.rs:446:55
[INFO] [stderr]     |
[INFO] [stderr] 446 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stderr]   --> src/lib.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use serde::{Serialize, Deserialize};
[INFO] [stderr]    |             ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `multihash::Hash`
[INFO] [stderr]   --> src/lib.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use multihash::Hash;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `protobuf::CodedInputStream`
[INFO] [stderr]   --> src/lib.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use protobuf::CodedInputStream;
[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 `merkledag`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "9c9d9093a219e34a0f01a10bf08be57f9bcb34703f16042c14e52cf799de333f"`
[INFO] running `"docker" "rm" "-f" "9c9d9093a219e34a0f01a10bf08be57f9bcb34703f16042c14e52cf799de333f"`
[INFO] [stdout] 9c9d9093a219e34a0f01a10bf08be57f9bcb34703f16042c14e52cf799de333f