[INFO] fetching crate num_reader 0.1.2...
[INFO] building num_reader-0.1.2 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate num_reader 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate num_reader 0.1.2
[INFO] finished tweaking crates.io crate num_reader 0.1.2
[INFO] tweaked toml for crates.io crate num_reader 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate num_reader 0.1.2 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b25079d7e99d1e5e25d6e57c56b60753481d20a75dfc8837a2fcf708b3bc4823
[INFO] running `Command { std: "docker" "start" "-a" "b25079d7e99d1e5e25d6e57c56b60753481d20a75dfc8837a2fcf708b3bc4823", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b25079d7e99d1e5e25d6e57c56b60753481d20a75dfc8837a2fcf708b3bc4823", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b25079d7e99d1e5e25d6e57c56b60753481d20a75dfc8837a2fcf708b3bc4823", kill_on_drop: false }`
[INFO] [stdout] b25079d7e99d1e5e25d6e57c56b60753481d20a75dfc8837a2fcf708b3bc4823
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e2b98b19f1735908a7d3d4da76be14f7c2b6a0f067c9c11adcd3e59d24fcbd6
[INFO] running `Command { std: "docker" "start" "-a" "6e2b98b19f1735908a7d3d4da76be14f7c2b6a0f067c9c11adcd3e59d24fcbd6", kill_on_drop: false }`
[INFO] [stderr]    Compiling num_reader v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "6e2b98b19f1735908a7d3d4da76be14f7c2b6a0f067c9c11adcd3e59d24fcbd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e2b98b19f1735908a7d3d4da76be14f7c2b6a0f067c9c11adcd3e59d24fcbd6", kill_on_drop: false }`
[INFO] [stdout] 6e2b98b19f1735908a7d3d4da76be14f7c2b6a0f067c9c11adcd3e59d24fcbd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f7267a1949a24eb24df976a7985f640235fd52ef0c14ec32db3835beb2a828b
[INFO] running `Command { std: "docker" "start" "-a" "1f7267a1949a24eb24df976a7985f640235fd52ef0c14ec32db3835beb2a828b", kill_on_drop: false }`
[INFO] [stderr]    Compiling num_reader v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "1f7267a1949a24eb24df976a7985f640235fd52ef0c14ec32db3835beb2a828b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f7267a1949a24eb24df976a7985f640235fd52ef0c14ec32db3835beb2a828b", kill_on_drop: false }`
[INFO] [stdout] 1f7267a1949a24eb24df976a7985f640235fd52ef0c14ec32db3835beb2a828b