[INFO] fetching crate balanced-tree-index 2.0.0...
[INFO] checking balanced-tree-index-2.0.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate balanced-tree-index 2.0.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate balanced-tree-index 2.0.0 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate balanced-tree-index 2.0.0
[INFO] finished tweaking crates.io crate balanced-tree-index 2.0.0
[INFO] tweaked toml for crates.io crate balanced-tree-index 2.0.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] a30f6af112583144ad42e13eff3c86b9548d59bc70b691eb41c78d453dc2636a
[INFO] running `Command { std: "docker" "start" "-a" "a30f6af112583144ad42e13eff3c86b9548d59bc70b691eb41c78d453dc2636a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a30f6af112583144ad42e13eff3c86b9548d59bc70b691eb41c78d453dc2636a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a30f6af112583144ad42e13eff3c86b9548d59bc70b691eb41c78d453dc2636a", kill_on_drop: false }`
[INFO] [stdout] a30f6af112583144ad42e13eff3c86b9548d59bc70b691eb41c78d453dc2636a
[INFO] running `Command { std: "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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 329b6820e3691de650af38e8fe28656a3e8ed1f4b902c05efbfb8ccf3d055cd4
[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" "329b6820e3691de650af38e8fe28656a3e8ed1f4b902c05efbfb8ccf3d055cd4", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking aligned-array v1.0.1
[INFO] [stderr]     Checking aligned-cmov v2.0.0
[INFO] [stderr]     Checking balanced-tree-index v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `test_helper`
[INFO] [stdout]    --> src/lib.rs:226:9
[INFO] [stdout]     |
[INFO] [stdout] 226 |         test_helper::run_with_several_seeds(|mut rng| {
[INFO] [stdout]     |         ^^^^^^^^^^^ use of undeclared crate or module `test_helper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `test_helper`
[INFO] [stdout]    --> src/lib.rs:247:9
[INFO] [stdout]     |
[INFO] [stdout] 247 |         test_helper::run_with_several_seeds(|mut rng| {
[INFO] [stdout]     |         ^^^^^^^^^^^ use of undeclared crate or module `test_helper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `test_helper`
[INFO] [stdout]    --> src/lib.rs:435:9
[INFO] [stdout]     |
[INFO] [stdout] 435 |         test_helper::run_with_several_seeds(|mut rng| {
[INFO] [stdout]     |         ^^^^^^^^^^^ use of undeclared crate or module `test_helper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `test_helper`
[INFO] [stdout]    --> src/lib.rs:463:9
[INFO] [stdout]     |
[INFO] [stdout] 463 |         test_helper::run_with_several_seeds(|mut rng| {
[INFO] [stdout]     |         ^^^^^^^^^^^ use of undeclared crate or module `test_helper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `balanced-tree-index` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "329b6820e3691de650af38e8fe28656a3e8ed1f4b902c05efbfb8ccf3d055cd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "329b6820e3691de650af38e8fe28656a3e8ed1f4b902c05efbfb8ccf3d055cd4", kill_on_drop: false }`
[INFO] [stdout] 329b6820e3691de650af38e8fe28656a3e8ed1f4b902c05efbfb8ccf3d055cd4