[INFO] fetching crate pals 0.1.2...
[INFO] checking pals-0.1.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate pals 0.1.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate pals 0.1.2 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 pals 0.1.2
[INFO] finished tweaking crates.io crate pals 0.1.2
[INFO] tweaked toml for crates.io crate pals 0.1.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate pals 0.1.2 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 utf16_reader v0.1.0
[INFO] [stderr]   Downloaded cmdline_words_parser v0.2.1
[INFO] [stderr]   Downloaded escape8259 v0.5.0
[INFO] [stderr]   Downloaded trees v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] e636e9cba4693010f02d66e32bb0d1aaf7462ba2e5a14fb1250152f0eea07c91
[INFO] running `Command { std: "docker" "start" "-a" "e636e9cba4693010f02d66e32bb0d1aaf7462ba2e5a14fb1250152f0eea07c91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e636e9cba4693010f02d66e32bb0d1aaf7462ba2e5a14fb1250152f0eea07c91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e636e9cba4693010f02d66e32bb0d1aaf7462ba2e5a14fb1250152f0eea07c91", kill_on_drop: false }`
[INFO] [stdout] e636e9cba4693010f02d66e32bb0d1aaf7462ba2e5a14fb1250152f0eea07c91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 34aae5bd51fb3c193f0c523ead89970312fd920d0dd8db0c28287ba2bdd91e29
[INFO] running `Command { std: "docker" "start" "-a" "34aae5bd51fb3c193f0c523ead89970312fd920d0dd8db0c28287ba2bdd91e29", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking escape8259 v0.5.0
[INFO] [stderr]     Checking cmdline_words_parser v0.2.1
[INFO] [stderr]     Checking trees v0.4.1
[INFO] [stderr]     Checking pals v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `Command { std: "docker" "inspect" "34aae5bd51fb3c193f0c523ead89970312fd920d0dd8db0c28287ba2bdd91e29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34aae5bd51fb3c193f0c523ead89970312fd920d0dd8db0c28287ba2bdd91e29", kill_on_drop: false }`
[INFO] [stdout] 34aae5bd51fb3c193f0c523ead89970312fd920d0dd8db0c28287ba2bdd91e29
[INFO] checking pals-0.1.2 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate pals 0.1.2 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate pals 0.1.2 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 pals 0.1.2
[INFO] finished tweaking crates.io crate pals 0.1.2
[INFO] tweaked toml for crates.io crate pals 0.1.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate pals 0.1.2 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 952809fc20be15e4d058b2110258a206e98296710c73738b1b1eaabe90b6468d
[INFO] running `Command { std: "docker" "start" "-a" "952809fc20be15e4d058b2110258a206e98296710c73738b1b1eaabe90b6468d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "952809fc20be15e4d058b2110258a206e98296710c73738b1b1eaabe90b6468d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "952809fc20be15e4d058b2110258a206e98296710c73738b1b1eaabe90b6468d", kill_on_drop: false }`
[INFO] [stdout] 952809fc20be15e4d058b2110258a206e98296710c73738b1b1eaabe90b6468d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] a10e8b1a673e3cc11ff46f5b0562c98c00cad37c6e50770617d2bdc5f119b76a
[INFO] running `Command { std: "docker" "start" "-a" "a10e8b1a673e3cc11ff46f5b0562c98c00cad37c6e50770617d2bdc5f119b76a", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking escape8259 v0.5.0
[INFO] [stderr]     Checking trees v0.4.1
[INFO] [stderr]     Checking cmdline_words_parser v0.2.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/trees-0.4.1/src/rc.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |             panic!();
[INFO] [stdout]    |             ^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[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 `trees` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a10e8b1a673e3cc11ff46f5b0562c98c00cad37c6e50770617d2bdc5f119b76a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a10e8b1a673e3cc11ff46f5b0562c98c00cad37c6e50770617d2bdc5f119b76a", kill_on_drop: false }`
[INFO] [stdout] a10e8b1a673e3cc11ff46f5b0562c98c00cad37c6e50770617d2bdc5f119b76a