[INFO] fetching crate qcow2-fuse 0.1.1...
[INFO] checking qcow2-fuse-0.1.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate qcow2-fuse 0.1.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate qcow2-fuse 0.1.1 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 qcow2-fuse 0.1.1
[INFO] finished tweaking crates.io crate qcow2-fuse 0.1.1
[INFO] tweaked toml for crates.io crate qcow2-fuse 0.1.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate qcow2-fuse 0.1.1 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 positioned-io v0.2.2
[INFO] [stderr]   Downloaded daemonize v0.2.3
[INFO] [stderr]   Downloaded fuse v0.2.8
[INFO] [stderr]   Downloaded qcow2 v0.1.2
[INFO] [stderr]   Downloaded lru-cache v0.0.7
[INFO] [stderr]   Downloaded thread-scoped v1.0.2
[INFO] [stderr]   Downloaded linked-hash-map v0.0.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2115d890fb92edb3964053074e58a12a6c82bfc8cbfa33db01fbd55d46a50628
[INFO] running `Command { std: "docker" "start" "-a" "2115d890fb92edb3964053074e58a12a6c82bfc8cbfa33db01fbd55d46a50628", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2115d890fb92edb3964053074e58a12a6c82bfc8cbfa33db01fbd55d46a50628", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2115d890fb92edb3964053074e58a12a6c82bfc8cbfa33db01fbd55d46a50628", kill_on_drop: false }`
[INFO] [stdout] 2115d890fb92edb3964053074e58a12a6c82bfc8cbfa33db01fbd55d46a50628
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] c377ce347e3e61b41d6b5b4df506a99c33a56ddd97466e3d88c74281f3df7c4f
[INFO] running `Command { std: "docker" "start" "-a" "c377ce347e3e61b41d6b5b4df506a99c33a56ddd97466e3d88c74281f3df7c4f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]     Checking linked-hash-map v0.0.9
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking lru-cache v0.0.7
[INFO] [stderr]    Compiling fuse v0.2.8
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking positioned-io v0.2.2
[INFO] [stderr]     Checking daemonize v0.2.3
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking qcow2 v0.1.2
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking qcow2-fuse v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/fs.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `getopts` is imported redundantly
[INFO] [stdout]  --> src/opts.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use getopts;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate getopts;
[INFO] [stdout]   | --------------------- the item `getopts` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/fs.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `getopts` is imported redundantly
[INFO] [stdout]  --> src/opts.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use getopts;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate getopts;
[INFO] [stdout]   | --------------------- the item `getopts` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.20s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: daemonize v0.2.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "c377ce347e3e61b41d6b5b4df506a99c33a56ddd97466e3d88c74281f3df7c4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c377ce347e3e61b41d6b5b4df506a99c33a56ddd97466e3d88c74281f3df7c4f", kill_on_drop: false }`
[INFO] [stdout] c377ce347e3e61b41d6b5b4df506a99c33a56ddd97466e3d88c74281f3df7c4f
[INFO] checking qcow2-fuse-0.1.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate qcow2-fuse 0.1.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate qcow2-fuse 0.1.1 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 qcow2-fuse 0.1.1
[INFO] finished tweaking crates.io crate qcow2-fuse 0.1.1
[INFO] tweaked toml for crates.io crate qcow2-fuse 0.1.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate qcow2-fuse 0.1.1 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2a7b4d4e37fe5a8c2270c072bf5ab75aea2640e63426337855c19aaf56e6f5f2
[INFO] running `Command { std: "docker" "start" "-a" "2a7b4d4e37fe5a8c2270c072bf5ab75aea2640e63426337855c19aaf56e6f5f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a7b4d4e37fe5a8c2270c072bf5ab75aea2640e63426337855c19aaf56e6f5f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a7b4d4e37fe5a8c2270c072bf5ab75aea2640e63426337855c19aaf56e6f5f2", kill_on_drop: false }`
[INFO] [stdout] 2a7b4d4e37fe5a8c2270c072bf5ab75aea2640e63426337855c19aaf56e6f5f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] be213e539058acc03b098e1b7f4a789b5cdfe9c24b554bd0da54d715e8163b1e
[INFO] running `Command { std: "docker" "start" "-a" "be213e539058acc03b098e1b7f4a789b5cdfe9c24b554bd0da54d715e8163b1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking linked-hash-map v0.0.9
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking lru-cache v0.0.7
[INFO] [stderr]    Compiling fuse v0.2.8
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking positioned-io v0.2.2
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking daemonize v0.2.3
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking qcow2 v0.1.2
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-0.1.80/src/exec.rs:726:13
[INFO] [stdout]     |
[INFO] [stdout] 726 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 727 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 728 | |                 &self.cache,
[INFO] [stdout] 729 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 736 | |                 Quit => return Some(Quit),
[INFO] [stdout] 737 | |             };
[INFO] [stdout]     | |_____________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[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] running `Command { std: "docker" "inspect" "be213e539058acc03b098e1b7f4a789b5cdfe9c24b554bd0da54d715e8163b1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be213e539058acc03b098e1b7f4a789b5cdfe9c24b554bd0da54d715e8163b1e", kill_on_drop: false }`
[INFO] [stdout] be213e539058acc03b098e1b7f4a789b5cdfe9c24b554bd0da54d715e8163b1e