[INFO] fetching crate ipa 0.3.0...
[INFO] checking ipa-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate ipa 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate ipa 0.3.0 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 crates.io crate ipa 0.3.0
[INFO] finished tweaking crates.io crate ipa 0.3.0
[INFO] tweaked toml for crates.io crate ipa 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate ipa 0.3.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_yaml v0.8.13
[INFO] [stderr]   Downloaded blake2b_simd v0.5.10
[INFO] [stderr]   Downloaded shellexpand v2.0.0
[INFO] [stderr]   Downloaded stderrlog v0.5.0
[INFO] [stderr]   Downloaded arrayvec v0.5.1
[INFO] [stderr]   Downloaded rust-argon2 v0.8.2
[INFO] [stderr]   Downloaded yaml-rust v0.4.4
[INFO] [stderr]   Downloaded dtoa v0.4.6
[INFO] [stderr]   Downloaded serde_derive v1.0.116
[INFO] [stderr]   Downloaded serde v1.0.116
[INFO] [stderr]   Downloaded dirs-sys v0.3.5
[INFO] [stderr]   Downloaded tempfile v3.1.0
[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] f1ec3857a2ec28ed553ddd8a27fecf9e5b37cc7f8b05f71d15c93ff1fd1eb36d
[INFO] running `Command { std: "docker" "start" "-a" "f1ec3857a2ec28ed553ddd8a27fecf9e5b37cc7f8b05f71d15c93ff1fd1eb36d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1ec3857a2ec28ed553ddd8a27fecf9e5b37cc7f8b05f71d15c93ff1fd1eb36d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1ec3857a2ec28ed553ddd8a27fecf9e5b37cc7f8b05f71d15c93ff1fd1eb36d", kill_on_drop: false }`
[INFO] [stdout] f1ec3857a2ec28ed553ddd8a27fecf9e5b37cc7f8b05f71d15c93ff1fd1eb36d
[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] c8d5a201e82f20deeb0c7a5321dd54f201405ab5fd9e8ccc79755d31e133d134
[INFO] running `Command { std: "docker" "start" "-a" "c8d5a201e82f20deeb0c7a5321dd54f201405ab5fd9e8ccc79755d31e133d134", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking shellexpand v2.0.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking stderrlog v0.5.0
[INFO] [stderr]     Checking serde_yaml v0.8.13
[INFO] [stderr]     Checking ipa v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.66s
[INFO] running `Command { std: "docker" "inspect" "c8d5a201e82f20deeb0c7a5321dd54f201405ab5fd9e8ccc79755d31e133d134", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8d5a201e82f20deeb0c7a5321dd54f201405ab5fd9e8ccc79755d31e133d134", kill_on_drop: false }`
[INFO] [stdout] c8d5a201e82f20deeb0c7a5321dd54f201405ab5fd9e8ccc79755d31e133d134
[INFO] checking ipa-0.3.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate ipa 0.3.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate ipa 0.3.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ipa 0.3.0
[INFO] finished tweaking crates.io crate ipa 0.3.0
[INFO] tweaked toml for crates.io crate ipa 0.3.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate ipa 0.3.0 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fb436f931676b259acebb0396ded5fb2a46aa3f5bd6646c11ad6d50c694c87c
[INFO] running `Command { std: "docker" "start" "-a" "5fb436f931676b259acebb0396ded5fb2a46aa3f5bd6646c11ad6d50c694c87c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fb436f931676b259acebb0396ded5fb2a46aa3f5bd6646c11ad6d50c694c87c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb436f931676b259acebb0396ded5fb2a46aa3f5bd6646c11ad6d50c694c87c", kill_on_drop: false }`
[INFO] [stdout] 5fb436f931676b259acebb0396ded5fb2a46aa3f5bd6646c11ad6d50c694c87c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4de11cfc3b3d14f6d8b8ccd8f10b471786de41d87ae94d394c0cbfd04328d3a
[INFO] running `Command { std: "docker" "start" "-a" "a4de11cfc3b3d14f6d8b8ccd8f10b471786de41d87ae94d394c0cbfd04328d3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking shellexpand v2.0.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking stderrlog v0.5.0
[INFO] [stderr]     Checking serde_yaml v0.8.13
[INFO] [stderr]     Checking ipa v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.50s
[INFO] running `Command { std: "docker" "inspect" "a4de11cfc3b3d14f6d8b8ccd8f10b471786de41d87ae94d394c0cbfd04328d3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4de11cfc3b3d14f6d8b8ccd8f10b471786de41d87ae94d394c0cbfd04328d3a", kill_on_drop: false }`
[INFO] [stdout] a4de11cfc3b3d14f6d8b8ccd8f10b471786de41d87ae94d394c0cbfd04328d3a