[INFO] fetching crate memur 0.1.2...
[INFO] checking memur-0.1.2 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate memur 0.1.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate memur 0.1.2 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate memur 0.1.2
[INFO] finished tweaking crates.io crate memur 0.1.2
[INFO] tweaked toml for crates.io crate memur 0.1.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08e253ea189ee989708d8d0ce1150cdbfafd207bd89e008b23a083997f6dd2cd
[INFO] running `Command { std: "docker" "start" "-a" "08e253ea189ee989708d8d0ce1150cdbfafd207bd89e008b23a083997f6dd2cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08e253ea189ee989708d8d0ce1150cdbfafd207bd89e008b23a083997f6dd2cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08e253ea189ee989708d8d0ce1150cdbfafd207bd89e008b23a083997f6dd2cd", kill_on_drop: false }`
[INFO] [stdout] 08e253ea189ee989708d8d0ce1150cdbfafd207bd89e008b23a083997f6dd2cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b1cfd671b57378fac9d280de452b40549db93d01ab93feb8d0d32918ddbe0ee
[INFO] running `Command { std: "docker" "start" "-a" "2b1cfd671b57378fac9d280de452b40549db93d01ab93feb8d0d32918ddbe0ee", kill_on_drop: false }`
[INFO] [stderr]     Checking memur v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `transmute_copy` that must be used
[INFO] [stdout]    --> src/droplist.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     std::mem::transmute_copy::<T, T>(ref_to_t);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let _ = std::mem::transmute_copy::<T, T>(ref_to_t);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `transmute_copy` that must be used
[INFO] [stdout]    --> src/droplist.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     std::mem::transmute_copy::<T, T>(ref_to_t);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let _ = std::mem::transmute_copy::<T, T>(ref_to_t);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "2b1cfd671b57378fac9d280de452b40549db93d01ab93feb8d0d32918ddbe0ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b1cfd671b57378fac9d280de452b40549db93d01ab93feb8d0d32918ddbe0ee", kill_on_drop: false }`
[INFO] [stdout] 2b1cfd671b57378fac9d280de452b40549db93d01ab93feb8d0d32918ddbe0ee
[INFO] checking memur-0.1.2 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] extracting crate memur 0.1.2 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate memur 0.1.2 on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate memur 0.1.2
[INFO] finished tweaking crates.io crate memur 0.1.2
[INFO] tweaked toml for crates.io crate memur 0.1.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79978b065f4850e4b900231eed4052cfaa0ab579f4c208b8171c64bad1080f21
[INFO] running `Command { std: "docker" "start" "-a" "79978b065f4850e4b900231eed4052cfaa0ab579f4c208b8171c64bad1080f21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79978b065f4850e4b900231eed4052cfaa0ab579f4c208b8171c64bad1080f21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79978b065f4850e4b900231eed4052cfaa0ab579f4c208b8171c64bad1080f21", kill_on_drop: false }`
[INFO] [stdout] 79978b065f4850e4b900231eed4052cfaa0ab579f4c208b8171c64bad1080f21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9daf74f63b8ae10ee11382b50f1a1490d137ccaaa6bea536540aeebb670b141
[INFO] running `Command { std: "docker" "start" "-a" "f9daf74f63b8ae10ee11382b50f1a1490d137ccaaa6bea536540aeebb670b141", kill_on_drop: false }`
[INFO] [stderr]     Checking memur v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `transmute_copy` that must be used
[INFO] [stdout]    --> src/droplist.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     std::mem::transmute_copy::<T, T>(ref_to_t);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let _ = std::mem::transmute_copy::<T, T>(ref_to_t);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `transmute_copy` that must be used
[INFO] [stdout]    --> src/droplist.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     std::mem::transmute_copy::<T, T>(ref_to_t);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let _ = std::mem::transmute_copy::<T, T>(ref_to_t);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "f9daf74f63b8ae10ee11382b50f1a1490d137ccaaa6bea536540aeebb670b141", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9daf74f63b8ae10ee11382b50f1a1490d137ccaaa6bea536540aeebb670b141", kill_on_drop: false }`
[INFO] [stdout] f9daf74f63b8ae10ee11382b50f1a1490d137ccaaa6bea536540aeebb670b141