[INFO] cloning repository https://github.com/hwchen/sumrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hwchen/sumrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwchen%2Fsumrs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwchen%2Fsumrs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e24f38742d022b41e133db840b230921973c9690
[INFO] checking hwchen/sumrs against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwchen%2Fsumrs" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hwchen/sumrs 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/hwchen/sumrs
[INFO] finished tweaking git repo https://github.com/hwchen/sumrs
[INFO] tweaked toml for git repo https://github.com/hwchen/sumrs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hwchen/sumrs 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]      Locking 20 packages
[INFO] [stderr]       Adding addr2line v0.21.0
[INFO] [stderr]       Adding adler v1.0.2
[INFO] [stderr]       Adding backtrace v0.3.71
[INFO] [stderr]       Adding cc v1.0.90
[INFO] [stderr]       Adding cfg-if v1.0.0
[INFO] [stderr]       Adding failure v0.1.8
[INFO] [stderr]       Adding failure_derive v0.1.8
[INFO] [stderr]       Adding gimli v0.28.1
[INFO] [stderr]       Adding libc v0.2.153
[INFO] [stderr]       Adding memchr v2.7.2
[INFO] [stderr]       Adding miniz_oxide v0.7.2
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding proc-macro2 v1.0.79
[INFO] [stderr]       Adding quote v1.0.35
[INFO] [stderr]       Adding rustc-demangle v0.1.23
[INFO] [stderr]       Adding sumrs v0.1.0 (/workspace/builds/worker-6-tc1/source)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding unicode-ident v1.0.12
[INFO] [stderr]       Adding unicode-xid v0.2.4
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4614fc156788c8aa54583d11735ec3869e5699a4456657acd785585106fa9de1
[INFO] running `Command { std: "docker" "start" "-a" "4614fc156788c8aa54583d11735ec3869e5699a4456657acd785585106fa9de1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4614fc156788c8aa54583d11735ec3869e5699a4456657acd785585106fa9de1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4614fc156788c8aa54583d11735ec3869e5699a4456657acd785585106fa9de1", kill_on_drop: false }`
[INFO] [stdout] 4614fc156788c8aa54583d11735ec3869e5699a4456657acd785585106fa9de1
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f6ded184d3fdcc8a1bc9c9d38b693367c9929f0b58023e2bba1bde859483021
[INFO] running `Command { std: "docker" "start" "-a" "6f6ded184d3fdcc8a1bc9c9d38b693367c9929f0b58023e2bba1bde859483021", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling cc v1.0.90
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking sumrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.56s
[INFO] running `Command { std: "docker" "inspect" "6f6ded184d3fdcc8a1bc9c9d38b693367c9929f0b58023e2bba1bde859483021", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f6ded184d3fdcc8a1bc9c9d38b693367c9929f0b58023e2bba1bde859483021", kill_on_drop: false }`
[INFO] [stdout] 6f6ded184d3fdcc8a1bc9c9d38b693367c9929f0b58023e2bba1bde859483021
[INFO] checking hwchen/sumrs against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwchen%2Fsumrs" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hwchen/sumrs 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 git repo https://github.com/hwchen/sumrs
[INFO] finished tweaking git repo https://github.com/hwchen/sumrs
[INFO] tweaked toml for git repo https://github.com/hwchen/sumrs written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hwchen/sumrs 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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 20 packages
[INFO] [stderr]       Adding addr2line v0.21.0
[INFO] [stderr]       Adding adler v1.0.2
[INFO] [stderr]       Adding backtrace v0.3.71
[INFO] [stderr]       Adding cc v1.0.90
[INFO] [stderr]       Adding cfg-if v1.0.0
[INFO] [stderr]       Adding failure v0.1.8
[INFO] [stderr]       Adding failure_derive v0.1.8
[INFO] [stderr]       Adding gimli v0.28.1
[INFO] [stderr]       Adding libc v0.2.153
[INFO] [stderr]       Adding memchr v2.7.2
[INFO] [stderr]       Adding miniz_oxide v0.7.2
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding proc-macro2 v1.0.79
[INFO] [stderr]       Adding quote v1.0.35
[INFO] [stderr]       Adding rustc-demangle v0.1.23
[INFO] [stderr]       Adding sumrs v0.1.0 (/workspace/builds/worker-6-tc2/source)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding unicode-ident v1.0.12
[INFO] [stderr]       Adding unicode-xid v0.2.4
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a51b523abeaa9a0126f6dd420ff5cc7fb7540283a77d45ffc420f984b4014c1d
[INFO] running `Command { std: "docker" "start" "-a" "a51b523abeaa9a0126f6dd420ff5cc7fb7540283a77d45ffc420f984b4014c1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a51b523abeaa9a0126f6dd420ff5cc7fb7540283a77d45ffc420f984b4014c1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a51b523abeaa9a0126f6dd420ff5cc7fb7540283a77d45ffc420f984b4014c1d", kill_on_drop: false }`
[INFO] [stdout] a51b523abeaa9a0126f6dd420ff5cc7fb7540283a77d45ffc420f984b4014c1d
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aeacc7d0be922a35729d6bad176198f98d23b9267f058c5ae5473b4aa2acac67
[INFO] running `Command { std: "docker" "start" "-a" "aeacc7d0be922a35729d6bad176198f98d23b9267f058c5ae5473b4aa2acac67", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling cc v1.0.90
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking sumrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.99s
[INFO] running `Command { std: "docker" "inspect" "aeacc7d0be922a35729d6bad176198f98d23b9267f058c5ae5473b4aa2acac67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aeacc7d0be922a35729d6bad176198f98d23b9267f058c5ae5473b4aa2acac67", kill_on_drop: false }`
[INFO] [stdout] aeacc7d0be922a35729d6bad176198f98d23b9267f058c5ae5473b4aa2acac67