[INFO] cloning repository https://github.com/mattcompiles/duct_tape
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattcompiles/duct_tape" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattcompiles%2Fduct_tape", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattcompiles%2Fduct_tape'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb2513d8dbd2d0034645dcbc7871c5fad7fd42a4
[INFO] checking mattcompiles/duct_tape against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattcompiles%2Fduct_tape" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mattcompiles/duct_tape on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mattcompiles/duct_tape
[INFO] finished tweaking git repo https://github.com/mattcompiles/duct_tape
[INFO] tweaked toml for git repo https://github.com/mattcompiles/duct_tape written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mattcompiles/duct_tape 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded swc_visit_macros v0.2.3
[INFO] [stderr]   Downloaded swc_visit v0.2.5
[INFO] [stderr]   Downloaded swc_ecma_ast v0.47.0
[INFO] [stderr]   Downloaded swc_macros_common v0.3.3
[INFO] [stderr]   Downloaded swc_ecma_visit v0.33.0
[INFO] [stderr]   Downloaded swc_common v0.10.23
[INFO] [stderr]   Downloaded node-resolve v2.2.0
[INFO] [stderr]   Downloaded static-map-macro v0.2.1
[INFO] [stderr]   Downloaded swc_ecma_transforms v0.57.0
[INFO] [stderr]   Downloaded node-builtins v0.1.0
[INFO] [stderr]   Downloaded swc_ecma_transforms_macros v0.2.1
[INFO] [stderr]   Downloaded normpath v0.2.0
[INFO] [stderr]   Downloaded swc_ecma_codegen v0.60.1
[INFO] [stderr]   Downloaded swc_ecma_transforms_compat v0.23.0
[INFO] [stderr]   Downloaded swc_ecma_loader v0.9.1
[INFO] [stderr]   Downloaded swc_ecma_transforms_module v0.24.1
[INFO] [stderr]   Downloaded lexical v5.2.2
[INFO] [stderr]   Downloaded swc_ecma_parser v0.61.3
[INFO] [stderr]   Downloaded swc_ecma_transforms_base v0.20.2
[INFO] [stderr]   Downloaded swc_ecma_transforms_typescript v0.26.0
[INFO] [stderr]   Downloaded pathdiff v0.2.0
[INFO] [stderr]   Downloaded swc_ecma_transforms_proposal v0.24.0
[INFO] [stderr]   Downloaded swc_eq_ignore_macros v0.1.0
[INFO] [stderr]   Downloaded retain_mut v0.1.3
[INFO] [stderr]   Downloaded swc_ecma_transforms_optimization v0.27.2
[INFO] [stderr]   Downloaded sourcemap v6.0.1
[INFO] [stderr]   Downloaded st-map v0.1.4
[INFO] [stderr]   Downloaded swc_ecma_codegen_macros v0.5.2
[INFO] [stderr]   Downloaded enum_kind v0.2.1
[INFO] [stderr]   Downloaded is-macro v0.1.9
[INFO] [stderr]   Downloaded string_enum v0.3.1
[INFO] [stderr]   Downloaded swc_atoms v0.2.6
[INFO] [stderr]   Downloaded ast_node v0.7.3
[INFO] [stderr]   Downloaded from_variant v0.1.3
[INFO] [stderr]   Downloaded if_chain v1.0.1
[INFO] [stderr]   Downloaded syn v1.0.65
[INFO] [stderr]   Downloaded swc_ecmascript v0.43.0
[INFO] [stderr]   Downloaded swc_ecma_utils v0.38.0
[INFO] [stderr]   Downloaded swc_ecma_preset_env v0.27.0
[INFO] [stderr]   Downloaded swc_ecma_transforms_classes v0.6.0
[INFO] [stderr]   Downloaded swc_ecma_transforms_react v0.25.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e9f4df0686f222306d22f39988ef91a34684757a6ada4d58f190010a0f4ee630
[INFO] running `Command { std: "docker" "start" "-a" "e9f4df0686f222306d22f39988ef91a34684757a6ada4d58f190010a0f4ee630", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9f4df0686f222306d22f39988ef91a34684757a6ada4d58f190010a0f4ee630", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9f4df0686f222306d22f39988ef91a34684757a6ada4d58f190010a0f4ee630", kill_on_drop: false }`
[INFO] [stdout] e9f4df0686f222306d22f39988ef91a34684757a6ada4d58f190010a0f4ee630
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b521eabec5c8585a11687397599c961e42326cfd7e46e859215365c1eb25a5b1
[INFO] running `Command { std: "docker" "start" "-a" "b521eabec5c8585a11687397599c961e42326cfd7e46e859215365c1eb25a5b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling siphasher v0.3.6
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking if_chain v1.0.1
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]     Checking cpufeatures v0.1.5
[INFO] [stderr]     Checking sha-1 v0.9.7
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking retain_mut v0.1.3
[INFO] [stderr]     Checking pathdiff v0.2.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking node-builtins v0.1.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking ordered-float v2.7.0
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]    Compiling swc_atoms v0.2.6
[INFO] [stderr]     Checking lexical v5.2.2
[INFO] [stderr]    Compiling pmutil v0.5.3
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling swc_macros_common v0.3.3
[INFO] [stderr]    Compiling swc_visit_macros v0.2.3
[INFO] [stderr]    Compiling from_variant v0.1.3
[INFO] [stderr]    Compiling swc_eq_ignore_macros v0.1.0
[INFO] [stderr]    Compiling string_enum v0.3.1
[INFO] [stderr]    Compiling is-macro v0.1.9
[INFO] [stderr]    Compiling enum_kind v0.2.1
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling swc_ecma_transforms_macros v0.2.1
[INFO] [stderr]    Compiling swc_ecma_codegen_macros v0.5.2
[INFO] [stderr]    Compiling static-map-macro v0.2.1
[INFO] [stderr]     Checking st-map v0.1.4
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking swc_visit v0.2.5
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling ast_node v0.7.3
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking sourcemap v6.0.1
[INFO] [stderr]     Checking node-resolve v2.2.0
[INFO] [stderr]     Checking swc_common v0.10.23
[INFO] [stderr]     Checking swc_ecma_ast v0.47.0
[INFO] [stderr]     Checking swc_ecma_visit v0.33.0
[INFO] [stderr]     Checking swc_ecma_parser v0.61.3
[INFO] [stderr]     Checking swc_ecma_utils v0.38.0
[INFO] [stderr]     Checking swc_ecma_loader v0.9.1
[INFO] [stderr]     Checking swc_ecma_transforms_base v0.20.2
[INFO] [stderr]     Checking swc_ecma_codegen v0.60.1
[INFO] [stderr]     Checking swc_ecma_transforms_classes v0.6.0
[INFO] [stderr]     Checking swc_ecma_transforms_module v0.24.1
[INFO] [stderr]     Checking swc_ecma_transforms_optimization v0.27.2
[INFO] [stderr]     Checking swc_ecma_transforms_typescript v0.26.0
[INFO] [stderr]     Checking swc_ecma_transforms_react v0.25.1
[INFO] [stderr]     Checking swc_ecma_transforms_proposal v0.24.0
[INFO] [stderr]     Checking swc_ecma_transforms_compat v0.23.0
[INFO] [stderr]     Checking swc_ecma_transforms v0.57.0
[INFO] [stderr]     Checking swc_ecma_preset_env v0.27.0
[INFO] [stderr]     Checking swc_ecmascript v0.43.0
[INFO] [stderr]     Checking ducttape v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 59.10s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: swc_ecma_codegen v0.60.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "b521eabec5c8585a11687397599c961e42326cfd7e46e859215365c1eb25a5b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b521eabec5c8585a11687397599c961e42326cfd7e46e859215365c1eb25a5b1", kill_on_drop: false }`
[INFO] [stdout] b521eabec5c8585a11687397599c961e42326cfd7e46e859215365c1eb25a5b1