[INFO] fetching crate red_union_find 0.3.0...
[INFO] checking red_union_find-0.3.0 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate red_union_find 0.3.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate red_union_find 0.3.0 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate red_union_find 0.3.0
[INFO] finished tweaking crates.io crate red_union_find 0.3.0
[INFO] tweaked toml for crates.io crate red_union_find 0.3.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "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" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3dcbadd4f55ddddee4932a25cecee1f93bd89293a383d8a6de422138a6377328
[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" "3dcbadd4f55ddddee4932a25cecee1f93bd89293a383d8a6de422138a6377328", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dcbadd4f55ddddee4932a25cecee1f93bd89293a383d8a6de422138a6377328", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dcbadd4f55ddddee4932a25cecee1f93bd89293a383d8a6de422138a6377328", kill_on_drop: false }`
[INFO] [stdout] 3dcbadd4f55ddddee4932a25cecee1f93bd89293a383d8a6de422138a6377328
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 708e6a268cd1c6743884a9ebefb68f8ef571be21041ea4ca6d0959d2b5d4a35d
[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" "708e6a268cd1c6743884a9ebefb68f8ef571be21041ea4ca6d0959d2b5d4a35d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking red_union_find v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `num_integer`
[INFO] [stdout]    --> src/lib.rs:507:13
[INFO] [stdout]     |
[INFO] [stdout] 507 |         use num_integer::Integer;
[INFO] [stdout]     |             ^^^^^^^^^^^ use of undeclared crate or module `num_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `red_union_find`
[INFO] [stdout] error[E0599]: no method named `gcd` found for type `u16` in the current scope
[INFO] [stdout]    --> src/lib.rs:518:22
[INFO] [stdout]     |
[INFO] [stdout] 518 |         assert_eq!(a.gcd(&b), 1, "a and b are not relatively prime");
[INFO] [stdout]     |                      ^^^ method not found in `u16`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[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] running `Command { std: "docker" "inspect" "708e6a268cd1c6743884a9ebefb68f8ef571be21041ea4ca6d0959d2b5d4a35d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "708e6a268cd1c6743884a9ebefb68f8ef571be21041ea4ca6d0959d2b5d4a35d", kill_on_drop: false }`
[INFO] [stdout] 708e6a268cd1c6743884a9ebefb68f8ef571be21041ea4ca6d0959d2b5d4a35d