[INFO] fetching crate fastxgz 0.3.0...
[INFO] checking fastxgz-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate fastxgz 0.3.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate fastxgz 0.3.0 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 fastxgz 0.3.0
[INFO] finished tweaking crates.io crate fastxgz 0.3.0
[INFO] tweaked toml for crates.io crate fastxgz 0.3.0 written to /workspace/builds/worker-5-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 7 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xxhash-rust v0.8.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 68a144f74651592ef2d98dd47d26946be506f36bf5dcfe90c3a46924b2b2cf0b
[INFO] running `Command { std: "docker" "start" "-a" "68a144f74651592ef2d98dd47d26946be506f36bf5dcfe90c3a46924b2b2cf0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68a144f74651592ef2d98dd47d26946be506f36bf5dcfe90c3a46924b2b2cf0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68a144f74651592ef2d98dd47d26946be506f36bf5dcfe90c3a46924b2b2cf0b", kill_on_drop: false }`
[INFO] [stdout] 68a144f74651592ef2d98dd47d26946be506f36bf5dcfe90c3a46924b2b2cf0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 8f0ca4e5bc0b24e62812f1ed71f073590a29fc98158d2bf05dfe905f3e533e8c
[INFO] running `Command { std: "docker" "start" "-a" "8f0ca4e5bc0b24e62812f1ed71f073590a29fc98158d2bf05dfe905f3e533e8c", kill_on_drop: false }`
[INFO] [stderr]     Checking xxhash-rust v0.8.10
[INFO] [stderr]     Checking fastxgz v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `simple_fasta_reads` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     use crate::high_level_interface::simple_fasta_reads;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 63 |
[INFO] [stdout] 64 |     use super::*;
[INFO] [stdout]    |         -------- the item `simple_fasta_reads` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` 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 0.40s
[INFO] running `Command { std: "docker" "inspect" "8f0ca4e5bc0b24e62812f1ed71f073590a29fc98158d2bf05dfe905f3e533e8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f0ca4e5bc0b24e62812f1ed71f073590a29fc98158d2bf05dfe905f3e533e8c", kill_on_drop: false }`
[INFO] [stdout] 8f0ca4e5bc0b24e62812f1ed71f073590a29fc98158d2bf05dfe905f3e533e8c
[INFO] checking fastxgz-0.3.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate fastxgz 0.3.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate fastxgz 0.3.0 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 fastxgz 0.3.0
[INFO] finished tweaking crates.io crate fastxgz 0.3.0
[INFO] tweaked toml for crates.io crate fastxgz 0.3.0 written to /workspace/builds/worker-5-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]     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 7 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] e924167da5bbcd3ccdbff3a4eea3f8c39daa256e9ea5f100342809cba83a27da
[INFO] running `Command { std: "docker" "start" "-a" "e924167da5bbcd3ccdbff3a4eea3f8c39daa256e9ea5f100342809cba83a27da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e924167da5bbcd3ccdbff3a4eea3f8c39daa256e9ea5f100342809cba83a27da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e924167da5bbcd3ccdbff3a4eea3f8c39daa256e9ea5f100342809cba83a27da", kill_on_drop: false }`
[INFO] [stdout] e924167da5bbcd3ccdbff3a4eea3f8c39daa256e9ea5f100342809cba83a27da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 53d0ba7dfd4403b90ce023317ff942d9c1c2d77230566da14e1828b916e1cf7d
[INFO] running `Command { std: "docker" "start" "-a" "53d0ba7dfd4403b90ce023317ff942d9c1c2d77230566da14e1828b916e1cf7d", kill_on_drop: false }`
[INFO] [stderr]     Checking xxhash-rust v0.8.10
[INFO] [stderr]     Checking fastxgz v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `simple_fasta_reads` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     use crate::high_level_interface::simple_fasta_reads;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 63 |
[INFO] [stdout] 64 |     use super::*;
[INFO] [stdout]    |         -------- the item `simple_fasta_reads` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` 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 0.42s
[INFO] running `Command { std: "docker" "inspect" "53d0ba7dfd4403b90ce023317ff942d9c1c2d77230566da14e1828b916e1cf7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53d0ba7dfd4403b90ce023317ff942d9c1c2d77230566da14e1828b916e1cf7d", kill_on_drop: false }`
[INFO] [stdout] 53d0ba7dfd4403b90ce023317ff942d9c1c2d77230566da14e1828b916e1cf7d