[INFO] fetching crate ppom 0.7.0...
[INFO] checking ppom-0.7.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate ppom 0.7.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate ppom 0.7.0 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 ppom 0.7.0
[INFO] finished tweaking crates.io crate ppom 0.7.0
[INFO] tweaked toml for crates.io crate ppom 0.7.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate ppom 0.7.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded structopt-derive v0.4.16
[INFO] [stderr]   Downloaded derive_arbitrary v0.4.7
[INFO] [stderr]   Downloaded structopt v0.3.23
[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] 1b238245b20d3a935667e93573d03e2980e5c187d8ec5b65b7e2956bd73b4719
[INFO] running `Command { std: "docker" "start" "-a" "1b238245b20d3a935667e93573d03e2980e5c187d8ec5b65b7e2956bd73b4719", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b238245b20d3a935667e93573d03e2980e5c187d8ec5b65b7e2956bd73b4719", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b238245b20d3a935667e93573d03e2980e5c187d8ec5b65b7e2956bd73b4719", kill_on_drop: false }`
[INFO] [stdout] 1b238245b20d3a935667e93573d03e2980e5c187d8ec5b65b7e2956bd73b4719
[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] dccba325a97719976c6620a22a119b4f359a102c29e78706a11dde26293e16d0
[INFO] running `Command { std: "docker" "start" "-a" "dccba325a97719976c6620a22a119b4f359a102c29e78706a11dde26293e16d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking ppom v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/./ppom.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cmp::{Ord, Ordering},
[INFO] [stdout]   |           ^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/omap.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cmp::{Ord, Ordering},
[INFO] [stdout]   |           ^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling derive_arbitrary v0.4.7
[INFO] [stderr]     Checking arbitrary v0.4.7
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/./ppom.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cmp::{Ord, Ordering},
[INFO] [stdout]   |           ^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `arbitrary` is imported redundantly
[INFO] [stdout]  --> src/arc_test.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use arbitrary::{self, unstructured::Unstructured, Arbitrary};
[INFO] [stdout]   |                 ^^^^ the item `arbitrary` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Bound` is imported redundantly
[INFO] [stdout]   --> src/mdb_test.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  |     ops::Bound,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 | use super::*;
[INFO] [stdout]    |     -------- the item `Bound` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `arbitrary` is imported redundantly
[INFO] [stdout]  --> src/omap_test.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use arbitrary::{self, unstructured::Unstructured, Arbitrary};
[INFO] [stdout]   |                 ^^^^ the item `arbitrary` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rng` is imported redundantly
[INFO] [stdout]  --> src/omap_test.rs:2:45
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::{prelude::random, rngs::SmallRng, Rng, SeedableRng};
[INFO] [stdout]   |                                             ^^^
[INFO] [stdout] 3 |
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Rng` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `arbitrary` is imported redundantly
[INFO] [stdout]  --> src/rc_test.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use arbitrary::{self, unstructured::Unstructured, Arbitrary};
[INFO] [stdout]   |                 ^^^^ the item `arbitrary` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.61s
[INFO] running `Command { std: "docker" "inspect" "dccba325a97719976c6620a22a119b4f359a102c29e78706a11dde26293e16d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dccba325a97719976c6620a22a119b4f359a102c29e78706a11dde26293e16d0", kill_on_drop: false }`
[INFO] [stdout] dccba325a97719976c6620a22a119b4f359a102c29e78706a11dde26293e16d0
[INFO] checking ppom-0.7.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate ppom 0.7.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate ppom 0.7.0 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 ppom 0.7.0
[INFO] finished tweaking crates.io crate ppom 0.7.0
[INFO] tweaked toml for crates.io crate ppom 0.7.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate ppom 0.7.0 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] 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] f43588b456d406a2cee6d962fa5e8ffe4478ec13c7b686b35b116949ff3b9d79
[INFO] running `Command { std: "docker" "start" "-a" "f43588b456d406a2cee6d962fa5e8ffe4478ec13c7b686b35b116949ff3b9d79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f43588b456d406a2cee6d962fa5e8ffe4478ec13c7b686b35b116949ff3b9d79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f43588b456d406a2cee6d962fa5e8ffe4478ec13c7b686b35b116949ff3b9d79", kill_on_drop: false }`
[INFO] [stdout] f43588b456d406a2cee6d962fa5e8ffe4478ec13c7b686b35b116949ff3b9d79
[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] b1042a608a81b7b9434e5d7bcc0509abafbaad72ef5340bb52e946fadcd1524c
[INFO] running `Command { std: "docker" "start" "-a" "b1042a608a81b7b9434e5d7bcc0509abafbaad72ef5340bb52e946fadcd1524c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking ppom v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/./ppom.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cmp::{Ord, Ordering},
[INFO] [stdout]   |           ^^^
[INFO] [stdout]  --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/omap.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cmp::{Ord, Ordering},
[INFO] [stdout]   |           ^^^
[INFO] [stdout]  --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/./ppom.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |             err_at!(Fatal, msg: "mismatch in count {} != {}", n_count, self.n_count)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/./ppom.rs:449:13
[INFO] [stdout]     |
[INFO] [stdout] 449 |             err_at!(Fatal, msg: "unbalanced blacks {} {}", lb, rb)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/mdb.rs:419:21
[INFO] [stdout]     |
[INFO] [stdout] 419 |                     err_at!(InvalidCAS, msg: "{} != {:?}", node.to_seqno(), cas)?;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/mdb.rs:562:13
[INFO] [stdout]     |
[INFO] [stdout] 562 |             err_at!(Fatal, msg: "root node must be black")?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/mdb.rs:789:9
[INFO] [stdout]     |
[INFO] [stdout] 789 |         err_at!(Fatal, msg: "tree exceeds max_depth {}", depth)?;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/omap.rs:132:13
[INFO] [stdout]     |
[INFO] [stdout] 132 |             err_at!(Fatal, msg: "mismatch in count {} != {}", n_count, self.n_count)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/omap.rs:452:13
[INFO] [stdout]     |
[INFO] [stdout] 452 |             err_at!(Fatal, msg: "unbalanced blacks {} {}", lb, rb)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ppom` (lib) due to 8 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b1042a608a81b7b9434e5d7bcc0509abafbaad72ef5340bb52e946fadcd1524c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1042a608a81b7b9434e5d7bcc0509abafbaad72ef5340bb52e946fadcd1524c", kill_on_drop: false }`
[INFO] [stdout] b1042a608a81b7b9434e5d7bcc0509abafbaad72ef5340bb52e946fadcd1524c