[INFO] fetching crate ion-cli 0.4.1...
[INFO] checking ion-cli-0.4.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate ion-cli 0.4.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate ion-cli 0.4.1 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 ion-cli 0.4.1
[INFO] finished tweaking crates.io crate ion-cli 0.4.1
[INFO] tweaked toml for crates.io crate ion-cli 0.4.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate ion-cli 0.4.1 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 delegate v0.5.2
[INFO] [stderr]   Downloaded textwrap v0.9.0
[INFO] [stderr]   Downloaded ion-schema v0.4.0
[INFO] [stderr]   Downloaded clap v2.27.1
[INFO] [stderr]   Downloaded ion-rs v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 6bdf3269aa17fabc094e7c3b90e6a248c3c499a294be65ca39f96e59c5d598d4
[INFO] running `Command { std: "docker" "start" "-a" "6bdf3269aa17fabc094e7c3b90e6a248c3c499a294be65ca39f96e59c5d598d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6bdf3269aa17fabc094e7c3b90e6a248c3c499a294be65ca39f96e59c5d598d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bdf3269aa17fabc094e7c3b90e6a248c3c499a294be65ca39f96e59c5d598d4", kill_on_drop: false }`
[INFO] [stdout] 6bdf3269aa17fabc094e7c3b90e6a248c3c499a294be65ca39f96e59c5d598d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f12ed6d4307db6290d8a617934e3caf08248c4968709839acae9af364c5ba038
[INFO] running `Command { std: "docker" "start" "-a" "f12ed6d4307db6290d8a617934e3caf08248c4968709839acae9af364c5ba038", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stderr]     Checking predicates-core v1.0.3
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking termtree v0.2.4
[INFO] [stderr]     Checking predicates-tree v1.0.5
[INFO] [stderr]     Checking predicates v2.1.1
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling rstest v0.10.0
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking clap v2.27.1
[INFO] [stderr]     Checking assert_cmd v1.0.8
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking bigdecimal v0.2.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling delegate v0.5.2
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking ion-rs v0.12.0
[INFO] [stderr]     Checking ion-schema v0.4.0
[INFO] [stderr]     Checking ion-cli v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `IonResult` is imported redundantly
[INFO] [stdout]   --> src/bin/ion/commands/beta/inspect.rs:12:38
[INFO] [stdout]    |
[INFO] [stdout] 12 | use ion_rs::result::{decoding_error, IonResult};
[INFO] [stdout]    |                                      ^^^^^^^^^
[INFO] [stdout] 13 | use ion_rs::*;
[INFO] [stdout]    |     --------- the item `IonResult` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IonResult` is imported redundantly
[INFO] [stdout]   --> src/bin/ion/commands/beta/inspect.rs:12:38
[INFO] [stdout]    |
[INFO] [stdout] 12 | use ion_rs::result::{decoding_error, IonResult};
[INFO] [stdout]    |                                      ^^^^^^^^^
[INFO] [stdout] 13 | use ion_rs::*;
[INFO] [stdout]    |     --------- the item `IonResult` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.85s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rstest v0.10.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "f12ed6d4307db6290d8a617934e3caf08248c4968709839acae9af364c5ba038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f12ed6d4307db6290d8a617934e3caf08248c4968709839acae9af364c5ba038", kill_on_drop: false }`
[INFO] [stdout] f12ed6d4307db6290d8a617934e3caf08248c4968709839acae9af364c5ba038