[INFO] fetching crate mbox 0.4.4...
[INFO] checking mbox-0.4.4 against master#2ad5292aea6328113b55968b4322528d48261316 for pr-80243
[INFO] extracting crate mbox 0.4.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate mbox 0.4.4 on toolchain 2ad5292aea6328113b55968b4322528d48261316
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mbox 0.4.4
[INFO] finished tweaking crates.io crate mbox 0.4.4
[INFO] tweaked toml for crates.io crate mbox 0.4.4 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+2ad5292aea6328113b55968b4322528d48261316" "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] 6a654468beb9ecb7f61fafe8ae1c1a5d875b4c7e05fae3165f7a6a5c16f7fd48
[INFO] running `Command { std: "docker" "start" "-a" "6a654468beb9ecb7f61fafe8ae1c1a5d875b4c7e05fae3165f7a6a5c16f7fd48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a654468beb9ecb7f61fafe8ae1c1a5d875b4c7e05fae3165f7a6a5c16f7fd48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a654468beb9ecb7f61fafe8ae1c1a5d875b4c7e05fae3165f7a6a5c16f7fd48", kill_on_drop: false }`
[INFO] [stdout] 6a654468beb9ecb7f61fafe8ae1c1a5d875b4c7e05fae3165f7a6a5c16f7fd48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+2ad5292aea6328113b55968b4322528d48261316" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69cc5cf2e1ced26cc8a7410a9b981156c1dd42e2dedfb6c1a790861108be7d62
[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" "69cc5cf2e1ced26cc8a7410a9b981156c1dd42e2dedfb6c1a790861108be7d62", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling mbox v0.4.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:72:38
[INFO] [stdout]    |
[INFO] [stdout] 72 | #![cfg_attr(nightly_channel, feature(specialization,
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/sentinel.rs:110:20
[INFO] [stdout]     |
[INFO] [stdout] 110 |         let mbox = try!(MBox::from_raw_utf8_parts(base as *mut u8, len + 1));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/mbox.rs:730:22
[INFO] [stdout]     |
[INFO] [stdout] 730 |         let string = try!(from_utf8(bytes)) as *const str as *mut str;
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:72:38
[INFO] [stdout]    |
[INFO] [stdout] 72 | #![cfg_attr(nightly_channel, feature(specialization,
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/sentinel.rs:110:20
[INFO] [stdout]     |
[INFO] [stdout] 110 |         let mbox = try!(MBox::from_raw_utf8_parts(base as *mut u8, len + 1));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/mbox.rs:730:22
[INFO] [stdout]     |
[INFO] [stdout] 730 |         let string = try!(from_utf8(bytes)) as *const str as *mut str;
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.95s
[INFO] running `Command { std: "docker" "inspect" "69cc5cf2e1ced26cc8a7410a9b981156c1dd42e2dedfb6c1a790861108be7d62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69cc5cf2e1ced26cc8a7410a9b981156c1dd42e2dedfb6c1a790861108be7d62", kill_on_drop: false }`
[INFO] [stdout] 69cc5cf2e1ced26cc8a7410a9b981156c1dd42e2dedfb6c1a790861108be7d62