[INFO] fetching crate kg-symbol 0.2.0...
[INFO] checking kg-symbol-0.2.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate kg-symbol 0.2.0 into /workspace/builds/worker-65/source
[INFO] validating manifest of crates.io crate kg-symbol 0.2.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kg-symbol 0.2.0
[INFO] finished tweaking crates.io crate kg-symbol 0.2.0
[INFO] tweaked toml for crates.io crate kg-symbol 0.2.0 written to /workspace/builds/worker-65/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61b6897d379d38fb6671dc85414db0328f1d6086729a0b7c80e6e9b6334c906a
[INFO] running `Command { std: "docker" "start" "-a" "61b6897d379d38fb6671dc85414db0328f1d6086729a0b7c80e6e9b6334c906a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61b6897d379d38fb6671dc85414db0328f1d6086729a0b7c80e6e9b6334c906a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61b6897d379d38fb6671dc85414db0328f1d6086729a0b7c80e6e9b6334c906a", kill_on_drop: false }`
[INFO] [stdout] 61b6897d379d38fb6671dc85414db0328f1d6086729a0b7c80e6e9b6334c906a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b7e6bb849ab2ee5fc0eaef4bf5c06167edd0d9ac6a5f9e96a1281fceee52cc6
[INFO] running `Command { std: "docker" "start" "-a" "8b7e6bb849ab2ee5fc0eaef4bf5c06167edd0d9ac6a5f9e96a1281fceee52cc6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling ryu v1.0.6
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking kg-symbol v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::alloc::AllocRef`
[INFO] [stdout]  --> src/lib.rs:6:18
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::alloc::{AllocRef, Global, Layout, handle_alloc_error};
[INFO] [stdout]   |                  ^^^^^^^^ no `AllocRef` in `alloc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `alloc` found for struct `std::alloc::Global` in the current scope
[INFO] [stdout]   --> src/lib.rs:80:31
[INFO] [stdout]    |
[INFO] [stdout] 80 |             let data = Global.alloc(layout).unwrap_or_else(|_| handle_alloc_error(layout));
[INFO] [stdout]    |                               ^^^^^ method not found in `std::alloc::Global`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `dealloc` found for struct `std::alloc::Global` in the current scope
[INFO] [stdout]    --> src/lib.rs:101:20
[INFO] [stdout]     |
[INFO] [stdout] 101 |             Global.dealloc(self.0, layout);
[INFO] [stdout]     |                    ^^^^^^^ method not found in `std::alloc::Global`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kg-symbol` due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8b7e6bb849ab2ee5fc0eaef4bf5c06167edd0d9ac6a5f9e96a1281fceee52cc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b7e6bb849ab2ee5fc0eaef4bf5c06167edd0d9ac6a5f9e96a1281fceee52cc6", kill_on_drop: false }`
[INFO] [stdout] 8b7e6bb849ab2ee5fc0eaef4bf5c06167edd0d9ac6a5f9e96a1281fceee52cc6