[INFO] fetching crate tc-executor-wasmtime 0.8.0...
[INFO] building tc-executor-wasmtime-0.8.0 against try#615edd3ad1cf6871c977dc900317cb6c2070fd6b for pr-97334
[INFO] extracting crate tc-executor-wasmtime 0.8.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate tc-executor-wasmtime 0.8.0 on toolchain 615edd3ad1cf6871c977dc900317cb6c2070fd6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tc-executor-wasmtime 0.8.0
[INFO] finished tweaking crates.io crate tc-executor-wasmtime 0.8.0
[INFO] tweaked toml for crates.io crate tc-executor-wasmtime 0.8.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "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] f684cbbd14c8a0b38c2602beaec4cba7db92a47f05c1092a0170c2a057712753
[INFO] running `Command { std: "docker" "start" "-a" "f684cbbd14c8a0b38c2602beaec4cba7db92a47f05c1092a0170c2a057712753", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f684cbbd14c8a0b38c2602beaec4cba7db92a47f05c1092a0170c2a057712753", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f684cbbd14c8a0b38c2602beaec4cba7db92a47f05c1092a0170c2a057712753", kill_on_drop: false }`
[INFO] [stdout] f684cbbd14c8a0b38c2602beaec4cba7db92a47f05c1092a0170c2a057712753
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df1720d05a3eb0a4062a9453e9863360766aeb68efd50968802a119eae851d21
[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" "df1720d05a3eb0a4062a9453e9863360766aeb68efd50968802a119eae851d21", kill_on_drop: false }`
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[INFO] [stderr]    Compiling tc-executor-wasmtime v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/instance_wrapper.rs:388:4
[INFO] [stdout]     |
[INFO] [stdout] 388 |             &mut memory[range].copy_from_slice(data);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[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] 388 |             let _ = &mut memory[range].copy_from_slice(data);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9m 40s
[INFO] running `Command { std: "docker" "inspect" "df1720d05a3eb0a4062a9453e9863360766aeb68efd50968802a119eae851d21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df1720d05a3eb0a4062a9453e9863360766aeb68efd50968802a119eae851d21", kill_on_drop: false }`
[INFO] [stdout] df1720d05a3eb0a4062a9453e9863360766aeb68efd50968802a119eae851d21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b5042b989ee9d0e49e0ff7086c11f27fa97824ef128ec82d3501909bf464688
[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" "1b5042b989ee9d0e49e0ff7086c11f27fa97824ef128ec82d3501909bf464688", kill_on_drop: false }`
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/instance_wrapper.rs:388:4
[INFO] [stdout]     |
[INFO] [stdout] 388 |             &mut memory[range].copy_from_slice(data);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[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] 388 |             let _ = &mut memory[range].copy_from_slice(data);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tc-executor-wasmtime v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/instance_wrapper.rs:388:4
[INFO] [stdout]     |
[INFO] [stdout] 388 |             &mut memory[range].copy_from_slice(data);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[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] 388 |             let _ = &mut memory[range].copy_from_slice(data);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 11.45s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/tc_executor_wasmtime-473aad18f508d01c)
[INFO] running `Command { std: "docker" "inspect" "1b5042b989ee9d0e49e0ff7086c11f27fa97824ef128ec82d3501909bf464688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b5042b989ee9d0e49e0ff7086c11f27fa97824ef128ec82d3501909bf464688", kill_on_drop: false }`
[INFO] [stdout] 1b5042b989ee9d0e49e0ff7086c11f27fa97824ef128ec82d3501909bf464688