[INFO] fetching crate kg-tree 0.2.1...
[INFO] checking kg-tree-0.2.1 against try#55b3f428b4fac6790b1e8492e0b91ff2d80aec7c for pr-77035
[INFO] extracting crate kg-tree 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate kg-tree 0.2.1 on toolchain 55b3f428b4fac6790b1e8492e0b91ff2d80aec7c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kg-tree 0.2.1
[INFO] finished tweaking crates.io crate kg-tree 0.2.1
[INFO] tweaked toml for crates.io crate kg-tree 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded kg-utils v0.4.0
[INFO] [stderr]   Downloaded kg-symbol v0.2.0
[INFO] [stderr]   Downloaded kg-display-derive v0.1.1
[INFO] [stderr]   Downloaded kg-diag-derive v0.4.0
[INFO] [stderr]   Downloaded kg-display v0.1.2
[INFO] [stderr]   Downloaded kg-diag v0.4.0
[INFO] [stderr]   Downloaded kg-utils v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 51043fc6bce396e58904713da8c9715155202c65594652cd9e74f7b88640614b
[INFO] running `Command { std: "docker" "start" "-a" "51043fc6bce396e58904713da8c9715155202c65594652cd9e74f7b88640614b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51043fc6bce396e58904713da8c9715155202c65594652cd9e74f7b88640614b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51043fc6bce396e58904713da8c9715155202c65594652cd9e74f7b88640614b", kill_on_drop: false }`
[INFO] [stdout] 51043fc6bce396e58904713da8c9715155202c65594652cd9e74f7b88640614b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86f6f3231f988edb3243e571772afd06d224f58020a1c263ae92dfd531b29cd8
[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" "86f6f3231f988edb3243e571772afd06d224f58020a1c263ae92dfd531b29cd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling lexical-core v0.7.4
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling object v0.22.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.18
[INFO] [stderr]     Checking smallvec v1.5.1
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking assert_approx_eq v1.1.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking parking_lot_core v0.8.1
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking serde_yaml v0.8.14
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking kg-symbol v0.2.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stdout] error[E0432]: unresolved import `std::alloc::AllocRef`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-symbol-0.2.0/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]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-symbol-0.2.0/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]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-symbol-0.2.0/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`
[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 `Command { std: "docker" "inspect" "86f6f3231f988edb3243e571772afd06d224f58020a1c263ae92dfd531b29cd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86f6f3231f988edb3243e571772afd06d224f58020a1c263ae92dfd531b29cd8", kill_on_drop: false }`
[INFO] [stdout] 86f6f3231f988edb3243e571772afd06d224f58020a1c263ae92dfd531b29cd8