[INFO] fetching crate regex_generate 0.2.3...
[INFO] checking regex_generate-0.2.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate regex_generate 0.2.3 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate regex_generate 0.2.3 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 regex_generate 0.2.3
[INFO] finished tweaking crates.io crate regex_generate 0.2.3
[INFO] tweaked toml for crates.io crate regex_generate 0.2.3 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate regex_generate 0.2.3 already has a lockfile, it will not be regenerated
[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 getrandom v0.2.8
[INFO] [stderr]   Downloaded regex v1.7.1
[INFO] [stderr]   Downloaded libc v0.2.139
[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] 0b10f5a94b61ab33f30b2289886e3a805d320f6d3cd8f4b5ee0a7c0f6bc695de
[INFO] running `Command { std: "docker" "start" "-a" "0b10f5a94b61ab33f30b2289886e3a805d320f6d3cd8f4b5ee0a7c0f6bc695de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b10f5a94b61ab33f30b2289886e3a805d320f6d3cd8f4b5ee0a7c0f6bc695de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b10f5a94b61ab33f30b2289886e3a805d320f6d3cd8f4b5ee0a7c0f6bc695de", kill_on_drop: false }`
[INFO] [stdout] 0b10f5a94b61ab33f30b2289886e3a805d320f6d3cd8f4b5ee0a7c0f6bc695de
[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] 8a06bc9f3d3b7a986a163b8841881dde36cfc256d5746ddd608187beac685fdc
[INFO] running `Command { std: "docker" "start" "-a" "8a06bc9f3d3b7a986a163b8841881dde36cfc256d5746ddd608187beac685fdc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]     Checking gimli v0.27.2
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking object v0.30.3
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking addr2line v0.19.0
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking error-chain v0.12.4
[INFO] [stderr]     Checking regex_generate v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 4   | extern crate rand;
[INFO] [stdout]     | ------------------ the item `rand` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 187 |     use rand;
[INFO] [stdout]     |         ^^^^
[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 7.74s
[INFO] running `Command { std: "docker" "inspect" "8a06bc9f3d3b7a986a163b8841881dde36cfc256d5746ddd608187beac685fdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a06bc9f3d3b7a986a163b8841881dde36cfc256d5746ddd608187beac685fdc", kill_on_drop: false }`
[INFO] [stdout] 8a06bc9f3d3b7a986a163b8841881dde36cfc256d5746ddd608187beac685fdc
[INFO] checking regex_generate-0.2.3 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate regex_generate 0.2.3 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate regex_generate 0.2.3 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 regex_generate 0.2.3
[INFO] finished tweaking crates.io crate regex_generate 0.2.3
[INFO] tweaked toml for crates.io crate regex_generate 0.2.3 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate regex_generate 0.2.3 already has a lockfile, it will not be regenerated
[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] 40fd277804f9aedad4a2c47caf143c199ef629f99dac5a2cfbe8065ab71d588e
[INFO] running `Command { std: "docker" "start" "-a" "40fd277804f9aedad4a2c47caf143c199ef629f99dac5a2cfbe8065ab71d588e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40fd277804f9aedad4a2c47caf143c199ef629f99dac5a2cfbe8065ab71d588e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40fd277804f9aedad4a2c47caf143c199ef629f99dac5a2cfbe8065ab71d588e", kill_on_drop: false }`
[INFO] [stdout] 40fd277804f9aedad4a2c47caf143c199ef629f99dac5a2cfbe8065ab71d588e
[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] 94939f43d3a8e484ed80006827e6abd88f4edce00b333d34a9a54a0fccbf710c
[INFO] running `Command { std: "docker" "start" "-a" "94939f43d3a8e484ed80006827e6abd88f4edce00b333d34a9a54a0fccbf710c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]     Checking gimli v0.27.2
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking object v0.30.3
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking addr2line v0.19.0
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking error-chain v0.12.4
[INFO] [stderr]     Checking regex_generate v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 4   | extern crate rand;
[INFO] [stdout]     | ------------------ the item `rand` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 187 |     use rand;
[INFO] [stdout]     |         ^^^^
[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 6.68s
[INFO] running `Command { std: "docker" "inspect" "94939f43d3a8e484ed80006827e6abd88f4edce00b333d34a9a54a0fccbf710c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94939f43d3a8e484ed80006827e6abd88f4edce00b333d34a9a54a0fccbf710c", kill_on_drop: false }`
[INFO] [stdout] 94939f43d3a8e484ed80006827e6abd88f4edce00b333d34a9a54a0fccbf710c