[INFO] updating cached repository i80and/marian-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/i80and/marian-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/i80and/marian-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/i80and/marian-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/i80and/marian-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/i80and/marian-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/i80and/marian-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/i80and/marian-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1c9ca328388902d35122b62cedeff984655c9bcd
[INFO] sha for GitHub repo i80and/marian-rs: 1c9ca328388902d35122b62cedeff984655c9bcd
[INFO] validating manifest of i80and/marian-rs 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 i80and/marian-rs 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 i80and/marian-rs
[INFO] finished frobbing i80and/marian-rs
[INFO] frobbed toml for i80and/marian-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/i80and/marian-rs/Cargo.toml
[INFO] started frobbing i80and/marian-rs
[INFO] finished frobbing i80and/marian-rs
[INFO] frobbed toml for i80and/marian-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/i80and/marian-rs/Cargo.toml
[INFO] crate i80and/marian-rs 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] [stderr]     Blocking waiting for file lock on package cache
[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] testing i80and/marian-rs 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-7/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/i80and/marian-rs:/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] 284a527f833e9ccac01f8d50fd08ac055aa9c4d72be54685a6ec10928defc6ac
[INFO] running `"docker" "start" "-a" "284a527f833e9ccac01f8d50fd08ac055aa9c4d72be54685a6ec10928defc6ac"`
[INFO] [stderr]    Compiling serde v1.0.50
[INFO] [stderr]    Compiling md5 v0.3.7
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling base64 v0.9.1
[INFO] [stderr]    Compiling bytes v0.4.7
[INFO] [stderr]    Compiling rustc_version v0.2.2
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling qp-trie v0.7.1
[INFO] [stderr]    Compiling syn v0.13.7
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling simple-logging v2.0.1
[INFO] [stderr] error[E0499]: cannot borrow `*self` as mutable more than once at a time
[INFO] [stderr]    --> /opt/crater/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/crater/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] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "284a527f833e9ccac01f8d50fd08ac055aa9c4d72be54685a6ec10928defc6ac"`
[INFO] running `"docker" "rm" "-f" "284a527f833e9ccac01f8d50fd08ac055aa9c4d72be54685a6ec10928defc6ac"`
[INFO] [stdout] 284a527f833e9ccac01f8d50fd08ac055aa9c4d72be54685a6ec10928defc6ac