[INFO] fetching crate stacker 0.1.15...
[INFO] checking stacker-0.1.15 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate stacker 0.1.15 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate stacker 0.1.15 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stacker 0.1.15
[INFO] finished tweaking crates.io crate stacker 0.1.15
[INFO] tweaked toml for crates.io crate stacker 0.1.15 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cee4745e46224a15ac382b7317820cfe47041e0a100e14c3916a671f38edb23
[INFO] running `Command { std: "docker" "start" "-a" "0cee4745e46224a15ac382b7317820cfe47041e0a100e14c3916a671f38edb23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cee4745e46224a15ac382b7317820cfe47041e0a100e14c3916a671f38edb23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cee4745e46224a15ac382b7317820cfe47041e0a100e14c3916a671f38edb23", kill_on_drop: false }`
[INFO] [stdout] 0cee4745e46224a15ac382b7317820cfe47041e0a100e14c3916a671f38edb23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3440b6f9bdf189c45cd7e744074e40926916cf2168740677fc4a6a34773dba33
[INFO] running `Command { std: "docker" "start" "-a" "3440b6f9bdf189c45cd7e744074e40926916cf2168740677fc4a6a34773dba33", kill_on_drop: false }`
[INFO] [stderr]    Compiling stacker v0.1.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> tests/simple.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     drop(x);
[INFO] [stdout]    |     ^^^^^-^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `[u8; 50000]`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "3440b6f9bdf189c45cd7e744074e40926916cf2168740677fc4a6a34773dba33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3440b6f9bdf189c45cd7e744074e40926916cf2168740677fc4a6a34773dba33", kill_on_drop: false }`
[INFO] [stdout] 3440b6f9bdf189c45cd7e744074e40926916cf2168740677fc4a6a34773dba33
[INFO] checking stacker-0.1.15 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate stacker 0.1.15 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate stacker 0.1.15 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stacker 0.1.15
[INFO] finished tweaking crates.io crate stacker 0.1.15
[INFO] tweaked toml for crates.io crate stacker 0.1.15 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6a178e7fc43dbfa19673d5c8df1181a277f313bdf926ac1bfe61a585d448eab8
[INFO] running `Command { std: "docker" "start" "-a" "6a178e7fc43dbfa19673d5c8df1181a277f313bdf926ac1bfe61a585d448eab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a178e7fc43dbfa19673d5c8df1181a277f313bdf926ac1bfe61a585d448eab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a178e7fc43dbfa19673d5c8df1181a277f313bdf926ac1bfe61a585d448eab8", kill_on_drop: false }`
[INFO] [stdout] 6a178e7fc43dbfa19673d5c8df1181a277f313bdf926ac1bfe61a585d448eab8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 353f93dd89854e39453de25385e0e65c8a87f6fa177ddb8f77b9e73ac168e017
[INFO] running `Command { std: "docker" "start" "-a" "353f93dd89854e39453de25385e0e65c8a87f6fa177ddb8f77b9e73ac168e017", kill_on_drop: false }`
[INFO] [stderr]    Compiling stacker v0.1.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> tests/simple.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     drop(x);
[INFO] [stdout]    |     ^^^^^-^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `[u8; 50000]`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "353f93dd89854e39453de25385e0e65c8a87f6fa177ddb8f77b9e73ac168e017", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "353f93dd89854e39453de25385e0e65c8a87f6fa177ddb8f77b9e73ac168e017", kill_on_drop: false }`
[INFO] [stdout] 353f93dd89854e39453de25385e0e65c8a87f6fa177ddb8f77b9e73ac168e017