[INFO] fetching crate shadowsocks-rs 0.9.0...
[INFO] checking shadowsocks-rs-0.9.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate shadowsocks-rs 0.9.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate shadowsocks-rs 0.9.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate shadowsocks-rs 0.9.0
[INFO] finished tweaking crates.io crate shadowsocks-rs 0.9.0
[INFO] tweaked toml for crates.io crate shadowsocks-rs 0.9.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate shadowsocks-rs 0.9.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded md5 v0.3.8
[INFO] [stderr]   Downloaded env_logger v0.8.3
[INFO] [stderr]   Downloaded cpufeatures v0.1.1
[INFO] [stderr]   Downloaded dns-resolver v0.2.4
[INFO] [stderr]   Downloaded chacha20 v0.7.1
[INFO] [stderr]   Downloaded futures-io v0.3.12
[INFO] [stderr]   Downloaded thread_local v1.1.2
[INFO] [stderr]   Downloaded futures-core v0.3.12
[INFO] [stderr]   Downloaded awak v0.2.13
[INFO] [stderr]   Downloaded cfb-mode v0.7.1
[INFO] [stderr]   Downloaded serde_derive v1.0.123
[INFO] [stderr]   Downloaded serde v1.0.123
[INFO] [stderr]   Downloaded aes v0.7.0
[INFO] [stderr]   Downloaded futures-util v0.3.12
[INFO] [stderr]   Downloaded domain v0.6.1
[INFO] [stderr]   Downloaded syn v1.0.60
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb1a2a3d1cfac9b1eabb60133f03db1bd1401cdc68fb7336037c6024e4232f57
[INFO] running `Command { std: "docker" "start" "-a" "fb1a2a3d1cfac9b1eabb60133f03db1bd1401cdc68fb7336037c6024e4232f57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb1a2a3d1cfac9b1eabb60133f03db1bd1401cdc68fb7336037c6024e4232f57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb1a2a3d1cfac9b1eabb60133f03db1bd1401cdc68fb7336037c6024e4232f57", kill_on_drop: false }`
[INFO] [stdout] fb1a2a3d1cfac9b1eabb60133f03db1bd1401cdc68fb7336037c6024e4232f57
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 005d04a9c0f57c0c287e325a2aba6b1d5c1bad00854c16665f7b356248a4fdba
[INFO] running `Command { std: "docker" "start" "-a" "005d04a9c0f57c0c287e325a2aba6b1d5c1bad00854c16665f7b356248a4fdba", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking futures-core v0.3.12
[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]     Checking cpufeatures v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking md5 v0.3.8
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking futures-task v0.3.12
[INFO] [stderr]     Checking thread_local v1.1.2
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking resolv-conf v0.7.0
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking cipher v0.3.0
[INFO] [stderr]     Checking chacha20 v0.7.1
[INFO] [stderr]     Checking cfb-mode v0.7.1
[INFO] [stderr]     Checking ctr v0.7.0
[INFO] [stderr]     Checking aes v0.7.0
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking domain v0.6.1
[INFO] [stderr]     Checking awak v0.2.13
[INFO] [stderr]     Checking serde_json v1.0.61
[INFO] [stderr]     Checking dns-resolver v0.2.4
[INFO] [stderr]     Checking shadowsocks-rs v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.00s
[INFO] running `Command { std: "docker" "inspect" "005d04a9c0f57c0c287e325a2aba6b1d5c1bad00854c16665f7b356248a4fdba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "005d04a9c0f57c0c287e325a2aba6b1d5c1bad00854c16665f7b356248a4fdba", kill_on_drop: false }`
[INFO] [stdout] 005d04a9c0f57c0c287e325a2aba6b1d5c1bad00854c16665f7b356248a4fdba
[INFO] checking shadowsocks-rs-0.9.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate shadowsocks-rs 0.9.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate shadowsocks-rs 0.9.0 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate shadowsocks-rs 0.9.0
[INFO] finished tweaking crates.io crate shadowsocks-rs 0.9.0
[INFO] tweaked toml for crates.io crate shadowsocks-rs 0.9.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate shadowsocks-rs 0.9.0 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2d746c2210b23f71e50bca9c9e96ee4f2d8c214ff493a388cc89c3aa2ccd09d
[INFO] running `Command { std: "docker" "start" "-a" "a2d746c2210b23f71e50bca9c9e96ee4f2d8c214ff493a388cc89c3aa2ccd09d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2d746c2210b23f71e50bca9c9e96ee4f2d8c214ff493a388cc89c3aa2ccd09d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2d746c2210b23f71e50bca9c9e96ee4f2d8c214ff493a388cc89c3aa2ccd09d", kill_on_drop: false }`
[INFO] [stdout] a2d746c2210b23f71e50bca9c9e96ee4f2d8c214ff493a388cc89c3aa2ccd09d
[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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 15b6924a3498d24a232173e364e594eeed12fcaa9092da739e9d8a890fbd1a61
[INFO] running `Command { std: "docker" "start" "-a" "15b6924a3498d24a232173e364e594eeed12fcaa9092da739e9d8a890fbd1a61", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking futures-core v0.3.12
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking cpufeatures v0.1.1
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking md5 v0.3.8
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking futures-task v0.3.12
[INFO] [stderr]     Checking thread_local v1.1.2
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking resolv-conf v0.7.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.4.3/src/exec.rs:841:13
[INFO] [stdout]     |
[INFO] [stdout] 841 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 842 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 843 | |                 self.cache.value(),
[INFO] [stdout] 844 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 855 | |                 Quit => return Some(Quit),
[INFO] [stdout] 856 | |             };
[INFO] [stdout]     | |_____________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking cipher v0.3.0
[INFO] [stderr]     Checking cfb-mode v0.7.1
[INFO] [stderr]     Checking aes v0.7.0
[INFO] [stderr]     Checking chacha20 v0.7.1
[INFO] [stderr]     Checking ctr v0.7.0
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regex` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "15b6924a3498d24a232173e364e594eeed12fcaa9092da739e9d8a890fbd1a61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15b6924a3498d24a232173e364e594eeed12fcaa9092da739e9d8a890fbd1a61", kill_on_drop: false }`
[INFO] [stdout] 15b6924a3498d24a232173e364e594eeed12fcaa9092da739e9d8a890fbd1a61