[INFO] updating cached repository https://github.com/i80and/marian-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] 1c9ca328388902d35122b62cedeff984655c9bcd
[INFO] testing i80and/marian-rs against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fi80and%2Fmarian-rs" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/i80and/marian-rs on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/i80and/marian-rs
[INFO] finished tweaking git repo https://github.com/i80and/marian-rs
[INFO] tweaked toml for git repo https://github.com/i80and/marian-rs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/i80and/marian-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3a72d2f09601e41371edf01db7bff4eada547d89ac039f6dce1030e453ec33e8
[INFO] running `"docker" "start" "-a" "3a72d2f09601e41371edf01db7bff4eada547d89ac039f6dce1030e453ec33e8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling byte-tools v0.2.0
[INFO] [stderr]    Compiling arrayref v0.3.4
[INFO] [stderr]    Compiling serde v1.0.50
[INFO] [stderr]    Compiling constant_time_eq v0.1.3
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling same-file v1.0.2
[INFO] [stderr]    Compiling md5 v0.3.7
[INFO] [stderr]    Compiling smallvec v0.6.1
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling relay v0.1.1
[INFO] [stderr]    Compiling base64 v0.9.1
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling regex-syntax v0.6.0
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling rustc_version v0.2.2
[INFO] [stderr]    Compiling walkdir v2.1.4
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling block-buffer v0.3.3
[INFO] [stderr]    Compiling idna v0.1.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.1
[INFO] [stderr]    Compiling qp-trie v0.7.1
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling simple-logging v2.0.1
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr] error[E0499]: cannot borrow `*self` as mutable more than once at a time
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/qp-trie-0.7.1/src/node.rs:502:41
[INFO] [stderr]     |
[INFO] [stderr] 479 |           &mut self,
[INFO] [stderr]     |           - let's call the lifetime of this reference `'1`
[INFO] [stderr] ...
[INFO] [stderr] 485 | /         match *self {
[INFO] [stderr] 486 | |             Node::Branch(ref mut branch) if branch.choice <= graft => {
[INFO] [stderr]     | |                          -------------- first mutable borrow occurs here
[INFO] [stderr] 487 | |                 let index = branch.index(key.borrow());
[INFO] [stderr] 488 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 502 | |                 let node = mem::replace(self, Node::Branch(Branch::new(graft)));
[INFO] [stderr]     | |                                         ^^^^ second mutable borrow occurs here
[INFO] [stderr] ...   |
[INFO] [stderr] 517 | |             }
[INFO] [stderr] 518 | |         }
[INFO] [stderr]     | |_________- returning this value requires that `self.0` is borrowed for `'1`
[INFO] [stderr] 
[INFO] [stderr] error[E0499]: cannot borrow `*self` as mutable more than once at a time
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/qp-trie-0.7.1/src/node.rs:505:45
[INFO] [stderr]     |
[INFO] [stderr] 479 |           &mut self,
[INFO] [stderr]     |           - let's call the lifetime of this reference `'1`
[INFO] [stderr] ...
[INFO] [stderr] 485 | /         match *self {
[INFO] [stderr] 486 | |             Node::Branch(ref mut branch) if branch.choice <= graft => {
[INFO] [stderr]     | |                          -------------- first mutable borrow occurs here
[INFO] [stderr] 487 | |                 let index = branch.index(key.borrow());
[INFO] [stderr] 488 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 505 | |                 let graft_branch = unsafe { self.unwrap_branch_mut() };
[INFO] [stderr]     | |                                             ^^^^ second mutable borrow occurs here
[INFO] [stderr] ...   |
[INFO] [stderr] 517 | |             }
[INFO] [stderr] 518 | |         }
[INFO] [stderr]     | |_________- returning this value requires that `self.0` is borrowed for `'1`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0499`.
[INFO] [stderr] error: could not compile `qp-trie`.
[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] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3a72d2f09601e41371edf01db7bff4eada547d89ac039f6dce1030e453ec33e8"`
[INFO] running `"docker" "rm" "-f" "3a72d2f09601e41371edf01db7bff4eada547d89ac039f6dce1030e453ec33e8"`
[INFO] [stdout] 3a72d2f09601e41371edf01db7bff4eada547d89ac039f6dce1030e453ec33e8