[INFO] fetching crate should 0.4.2...
[INFO] checking should-0.4.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate should 0.4.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate should 0.4.2 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 should 0.4.2
[INFO] finished tweaking crates.io crate should 0.4.2
[INFO] tweaked toml for crates.io crate should 0.4.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[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] 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] 257df70192206a631005a0a6d75870d49db61baad50ed41bceca869e10676c60
[INFO] running `Command { std: "docker" "start" "-a" "257df70192206a631005a0a6d75870d49db61baad50ed41bceca869e10676c60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "257df70192206a631005a0a6d75870d49db61baad50ed41bceca869e10676c60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "257df70192206a631005a0a6d75870d49db61baad50ed41bceca869e10676c60", kill_on_drop: false }`
[INFO] [stdout] 257df70192206a631005a0a6d75870d49db61baad50ed41bceca869e10676c60
[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] af12548686f0b343969cf8ad3458bcd5a3ce09cf3992173fa1b5eac448740002
[INFO] running `Command { std: "docker" "start" "-a" "af12548686f0b343969cf8ad3458bcd5a3ce09cf3992173fa1b5eac448740002", kill_on_drop: false }`
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking should v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `generic::*`
[INFO] [stdout]  --> src/impls/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use generic::*;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iterator::*`
[INFO] [stdout]  --> src/impls/mod.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub use iterator::*;
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `option::*`
[INFO] [stdout]  --> src/impls/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use option::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `result::*`
[INFO] [stdout]   --> src/impls/mod.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub use result::*;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `string::*`
[INFO] [stdout]   --> src/impls/mod.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use string::*;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous glob re-exports
[INFO] [stdout]  --> src/lib.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use impls::*;
[INFO] [stdout]   |         ^^^^^^^^ the name `option` in the type namespace is first re-exported here
[INFO] [stdout] 8 | pub use traits::*;
[INFO] [stdout]   |         --------- but the name `option` in the type namespace is also re-exported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(ambiguous_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous glob re-exports
[INFO] [stdout]  --> src/lib.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use impls::*;
[INFO] [stdout]   |         ^^^^^^^^ the name `result` in the type namespace is first re-exported here
[INFO] [stdout] 8 | pub use traits::*;
[INFO] [stdout]   |         --------- but the name `result` in the type namespace is also re-exported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `generic::*`
[INFO] [stdout]  --> src/impls/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use generic::*;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iterator::*`
[INFO] [stdout]  --> src/impls/mod.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub use iterator::*;
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `option::*`
[INFO] [stdout]  --> src/impls/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use option::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `result::*`
[INFO] [stdout]   --> src/impls/mod.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub use result::*;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `string::*`
[INFO] [stdout]   --> src/impls/mod.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use string::*;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous glob re-exports
[INFO] [stdout]  --> src/lib.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use impls::*;
[INFO] [stdout]   |         ^^^^^^^^ the name `option` in the type namespace is first re-exported here
[INFO] [stdout] 8 | pub use traits::*;
[INFO] [stdout]   |         --------- but the name `option` in the type namespace is also re-exported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(ambiguous_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous glob re-exports
[INFO] [stdout]  --> src/lib.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use impls::*;
[INFO] [stdout]   |         ^^^^^^^^ the name `result` in the type namespace is first re-exported here
[INFO] [stdout] 8 | pub use traits::*;
[INFO] [stdout]   |         --------- but the name `result` in the type namespace is also re-exported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "af12548686f0b343969cf8ad3458bcd5a3ce09cf3992173fa1b5eac448740002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af12548686f0b343969cf8ad3458bcd5a3ce09cf3992173fa1b5eac448740002", kill_on_drop: false }`
[INFO] [stdout] af12548686f0b343969cf8ad3458bcd5a3ce09cf3992173fa1b5eac448740002