[INFO] fetching crate vertree 0.2.2...
[INFO] checking vertree-0.2.2 against beta for pr-78714
[INFO] extracting crate vertree 0.2.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate vertree 0.2.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vertree 0.2.2
[INFO] finished tweaking crates.io crate vertree 0.2.2
[INFO] tweaked toml for crates.io crate vertree 0.2.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1fa73b56191d49664e2f26e331f4bd3cdc6ca832017d66358abd657ce3f9e66d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1fa73b56191d49664e2f26e331f4bd3cdc6ca832017d66358abd657ce3f9e66d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fa73b56191d49664e2f26e331f4bd3cdc6ca832017d66358abd657ce3f9e66d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fa73b56191d49664e2f26e331f4bd3cdc6ca832017d66358abd657ce3f9e66d", kill_on_drop: false }`
[INFO] [stdout] 1fa73b56191d49664e2f26e331f4bd3cdc6ca832017d66358abd657ce3f9e66d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 818bd1bdfcd11626a18cc2e799b5bf29efe060ebb9a2d95eadb24ccbe123e484
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "818bd1bdfcd11626a18cc2e799b5bf29efe060ebb9a2d95eadb24ccbe123e484", kill_on_drop: false }`
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]     Checking quickcheck v0.4.1
[INFO] [stderr]     Checking vertree v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / error_chain! {
[INFO] [stdout] 5  | |     foreign_links {
[INFO] [stdout] 6  | |         Io(::std::io::Error) #[cfg(unix)];
[INFO] [stdout] 7  | |         MsgPackEncodeError(rmp_serde::encode::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |     }
[INFO] [stdout] 46 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / error_chain! {
[INFO] [stdout] 5  | |     foreign_links {
[INFO] [stdout] 6  | |         Io(::std::io::Error) #[cfg(unix)];
[INFO] [stdout] 7  | |         MsgPackEncodeError(rmp_serde::encode::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |     }
[INFO] [stdout] 46 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right_matches`: superseded by `trim_end_matches`
[INFO] [stdout]    --> src/tree.rs:143:23
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let dir = dir.trim_right_matches('/');
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end_matches`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/snapshot.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     /// Create a random tree, take a snapshot, and ensure reading it back in gives the same tree
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/cas.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     /// Generate a bunch of write operations. Run them one at a time and filter out failing
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/cas.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     /// operations. Then run the whole set as a multi-cas. Ensure the output is the same between the
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/cas.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     /// ops run in the multicas and one at a time.
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / error_chain! {
[INFO] [stdout] 5  | |     foreign_links {
[INFO] [stdout] 6  | |         Io(::std::io::Error) #[cfg(unix)];
[INFO] [stdout] 7  | |         MsgPackEncodeError(rmp_serde::encode::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |     }
[INFO] [stdout] 46 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / error_chain! {
[INFO] [stdout] 5  | |     foreign_links {
[INFO] [stdout] 6  | |         Io(::std::io::Error) #[cfg(unix)];
[INFO] [stdout] 7  | |         MsgPackEncodeError(rmp_serde::encode::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |     }
[INFO] [stdout] 46 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/errors.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / error_chain! {
[INFO] [stdout] 5  | |     foreign_links {
[INFO] [stdout] 6  | |         Io(::std::io::Error) #[cfg(unix)];
[INFO] [stdout] 7  | |         MsgPackEncodeError(rmp_serde::encode::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |     }
[INFO] [stdout] 46 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right_matches`: superseded by `trim_end_matches`
[INFO] [stdout]    --> src/tree.rs:143:23
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let dir = dir.trim_right_matches('/');
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end_matches`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:268:14
[INFO] [stdout]     |
[INFO] [stdout] 268 |         let (mut queue, version, tree) = {
[INFO] [stdout]     |              ----^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:282:14
[INFO] [stdout]     |
[INFO] [stdout] 282 |         let (mut queue, version, tree) = {
[INFO] [stdout]     |              ----^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:295:14
[INFO] [stdout]     |
[INFO] [stdout] 295 |         let (mut set, version, tree) = {
[INFO] [stdout]     |              ----^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:308:14
[INFO] [stdout]     |
[INFO] [stdout] 308 |         let (mut set, version, tree) = {
[INFO] [stdout]     |              ----^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:322:13
[INFO] [stdout]     |
[INFO] [stdout] 322 |         let mut queue = node.content.get_queue_mut().unwrap();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:328:13
[INFO] [stdout]     |
[INFO] [stdout] 328 |         let mut queue = node.content.get_set_mut().unwrap();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right_matches`: superseded by `trim_end_matches`
[INFO] [stdout]    --> src/iterators.rs:352:55
[INFO] [stdout]     |
[INFO] [stdout] 352 |         let paths: Vec<&str> = paths.iter().map(|p| p.trim_right_matches('/')).collect();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end_matches`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/errors.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / error_chain! {
[INFO] [stdout] 5  | |     foreign_links {
[INFO] [stdout] 6  | |         Io(::std::io::Error) #[cfg(unix)];
[INFO] [stdout] 7  | |         MsgPackEncodeError(rmp_serde::encode::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |     }
[INFO] [stdout] 46 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:268:14
[INFO] [stdout]     |
[INFO] [stdout] 268 |         let (mut queue, version, tree) = {
[INFO] [stdout]     |              ----^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:282:14
[INFO] [stdout]     |
[INFO] [stdout] 282 |         let (mut queue, version, tree) = {
[INFO] [stdout]     |              ----^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:295:14
[INFO] [stdout]     |
[INFO] [stdout] 295 |         let (mut set, version, tree) = {
[INFO] [stdout]     |              ----^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:308:14
[INFO] [stdout]     |
[INFO] [stdout] 308 |         let (mut set, version, tree) = {
[INFO] [stdout]     |              ----^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:322:13
[INFO] [stdout]     |
[INFO] [stdout] 322 |         let mut queue = node.content.get_queue_mut().unwrap();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:328:13
[INFO] [stdout]     |
[INFO] [stdout] 328 |         let mut queue = node.content.get_set_mut().unwrap();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> benches/basic.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vertree`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "818bd1bdfcd11626a18cc2e799b5bf29efe060ebb9a2d95eadb24ccbe123e484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "818bd1bdfcd11626a18cc2e799b5bf29efe060ebb9a2d95eadb24ccbe123e484", kill_on_drop: false }`
[INFO] [stdout] 818bd1bdfcd11626a18cc2e799b5bf29efe060ebb9a2d95eadb24ccbe123e484