[INFO] fetching crate yasna 0.5.2...
[INFO] checking yasna-0.5.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate yasna 0.5.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate yasna 0.5.2 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 yasna 0.5.2
[INFO] finished tweaking crates.io crate yasna 0.5.2
[INFO] tweaked toml for crates.io crate yasna 0.5.2 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 17 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-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 991a72488884a3d357b5f924265b0186339133a0d2f729cfc24c8e0cdc42e6e1
[INFO] running `Command { std: "docker" "start" "-a" "991a72488884a3d357b5f924265b0186339133a0d2f729cfc24c8e0cdc42e6e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "991a72488884a3d357b5f924265b0186339133a0d2f729cfc24c8e0cdc42e6e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "991a72488884a3d357b5f924265b0186339133a0d2f729cfc24c8e0cdc42e6e1", kill_on_drop: false }`
[INFO] [stdout] 991a72488884a3d357b5f924265b0186339133a0d2f729cfc24c8e0cdc42e6e1
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc8d2b5c5546c9ce6bfc5af093337407b5833691769744e75447fea98a81d4c5
[INFO] running `Command { std: "docker" "start" "-a" "fc8d2b5c5546c9ce6bfc5af093337407b5833691769744e75447fea98a81d4c5", kill_on_drop: false }`
[INFO] [stderr]     Checking yasna v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Tag` is imported redundantly
[INFO] [stdout]   --> src/writer/tests.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use super::super::Tag;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 15 | use super::*;
[INFO] [stdout]    |     -------- the item `Tag` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Tag` is imported redundantly
[INFO] [stdout]   --> src/reader/tests.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use super::super::Tag;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 14 | use super::super::tags::TAG_SEQUENCE;
[INFO] [stdout] 15 | use super::*;
[INFO] [stdout]    |     -------- the item `Tag` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TAG_SEQUENCE` is imported redundantly
[INFO] [stdout]   --> src/reader/tests.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use super::super::tags::TAG_SEQUENCE;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 15 | use super::*;
[INFO] [stdout]    |     -------- the item `TAG_SEQUENCE` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "fc8d2b5c5546c9ce6bfc5af093337407b5833691769744e75447fea98a81d4c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc8d2b5c5546c9ce6bfc5af093337407b5833691769744e75447fea98a81d4c5", kill_on_drop: false }`
[INFO] [stdout] fc8d2b5c5546c9ce6bfc5af093337407b5833691769744e75447fea98a81d4c5
[INFO] checking yasna-0.5.2 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate yasna 0.5.2 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate yasna 0.5.2 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 yasna 0.5.2
[INFO] finished tweaking crates.io crate yasna 0.5.2
[INFO] tweaked toml for crates.io crate yasna 0.5.2 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 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-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b185586b4cbf992bbf8f63296b27b7e1bf67be7bdd7c5ae50c3470a8899c0d2e
[INFO] running `Command { std: "docker" "start" "-a" "b185586b4cbf992bbf8f63296b27b7e1bf67be7bdd7c5ae50c3470a8899c0d2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b185586b4cbf992bbf8f63296b27b7e1bf67be7bdd7c5ae50c3470a8899c0d2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b185586b4cbf992bbf8f63296b27b7e1bf67be7bdd7c5ae50c3470a8899c0d2e", kill_on_drop: false }`
[INFO] [stdout] b185586b4cbf992bbf8f63296b27b7e1bf67be7bdd7c5ae50c3470a8899c0d2e
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6d5802a9d377d93f03c2eedd5338eefd26e6906817d1e9da8b12acbb1f37c81
[INFO] running `Command { std: "docker" "start" "-a" "d6d5802a9d377d93f03c2eedd5338eefd26e6906817d1e9da8b12acbb1f37c81", kill_on_drop: false }`
[INFO] [stderr]     Checking yasna v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Tag` is imported redundantly
[INFO] [stdout]   --> src/writer/tests.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use super::super::Tag;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 15 | use super::*;
[INFO] [stdout]    |     -------- the item `Tag` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Tag` is imported redundantly
[INFO] [stdout]   --> src/reader/tests.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use super::super::Tag;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 14 | use super::super::tags::TAG_SEQUENCE;
[INFO] [stdout] 15 | use super::*;
[INFO] [stdout]    |     -------- the item `Tag` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TAG_SEQUENCE` is imported redundantly
[INFO] [stdout]   --> src/reader/tests.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use super::super::tags::TAG_SEQUENCE;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 15 | use super::*;
[INFO] [stdout]    |     -------- the item `TAG_SEQUENCE` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "d6d5802a9d377d93f03c2eedd5338eefd26e6906817d1e9da8b12acbb1f37c81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6d5802a9d377d93f03c2eedd5338eefd26e6906817d1e9da8b12acbb1f37c81", kill_on_drop: false }`
[INFO] [stdout] d6d5802a9d377d93f03c2eedd5338eefd26e6906817d1e9da8b12acbb1f37c81