[INFO] cloning repository https://github.com/loalang/loalang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/loalang/loalang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floalang%2Floalang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floalang%2Floalang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 745edc192564b3f362ad1623fbb8853fcefa876e
[INFO] checking loalang/loalang against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floalang%2Floalang" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/loalang/loalang on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/loalang/loalang
[INFO] finished tweaking git repo https://github.com/loalang/loalang
[INFO] tweaked toml for git repo https://github.com/loalang/loalang written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/loalang/loalang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lsp-types v0.60.0
[INFO] [stderr]   Downloaded tokio-stdin-stdout v0.1.5
[INFO] [stderr]   Downloaded ngrammatic v0.3.1
[INFO] [stderr]   Downloaded jsonrpc-stdio-server v14.0.0
[INFO] [stderr]   Downloaded lsp-server v0.2.0
[INFO] [stderr]   Downloaded jsonrpc-core v14.0.0
[INFO] [stderr]   Downloaded hyper-staticfile v0.4.2
[INFO] [stderr]   Downloaded peekmore v0.4.0
[INFO] [stderr]   Downloaded fraction v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4cab61f731bab4d1d0147e3197ffacf812371526c9bdd934fb6a6244cb6986c1
[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" "4cab61f731bab4d1d0147e3197ffacf812371526c9bdd934fb6a6244cb6986c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cab61f731bab4d1d0147e3197ffacf812371526c9bdd934fb6a6244cb6986c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cab61f731bab4d1d0147e3197ffacf812371526c9bdd934fb6a6244cb6986c1", kill_on_drop: false }`
[INFO] [stdout] 4cab61f731bab4d1d0147e3197ffacf812371526c9bdd934fb6a6244cb6986c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1de5d61d24994aefe25ace9e756a4131f797fdb02cca8216d52d73b9f51c5c82
[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" "1de5d61d24994aefe25ace9e756a4131f797fdb02cca8216d52d73b9f51c5c82", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling unicode-segmentation v1.5.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking peekmore v0.4.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking strum v0.17.1
[INFO] [stderr]     Checking ngrammatic v0.3.1
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling bincode v1.2.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling strum_macros v0.17.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking fraction v0.6.2
[INFO] [stderr]     Checking loalang v0.1.20 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `serde_yaml`
[INFO] [stdout]  --> src/lib/fixture_tests.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate serde_yaml;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[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 E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `loalang`
[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: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/lib/vm/call_stack.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | /         std::mem::replace(
[INFO] [stdout] 34 | |             self,
[INFO] [stdout] 35 | |             CallStack(Some(Arc::new(StackFrame {
[INFO] [stdout] 36 | |                 parent,
[INFO] [stdout] ...  |
[INFO] [stdout] 41 | |             }))),
[INFO] [stdout] 42 | |         );
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/lib/vm/call_stack.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         std::mem::replace(self, CallStack(parent));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/lib/optimization/optimizer.rs:308:9
[INFO] [stdout]     |
[INFO] [stdout] 308 |         std::mem::replace(self, optimized);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1de5d61d24994aefe25ace9e756a4131f797fdb02cca8216d52d73b9f51c5c82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1de5d61d24994aefe25ace9e756a4131f797fdb02cca8216d52d73b9f51c5c82", kill_on_drop: false }`
[INFO] [stdout] 1de5d61d24994aefe25ace9e756a4131f797fdb02cca8216d52d73b9f51c5c82