[INFO] cloning repository https://github.com/savish/rcomm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/savish/rcomm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsavish%2Frcomm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsavish%2Frcomm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f869288f07f761d2b7161c23b8a1cd8886df6bd
[INFO] checking savish/rcomm against try#7a89b05fa7ebfbb9dd798a7dbd888c0550beb838 for pr-109119
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsavish%2Frcomm" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/savish/rcomm on toolchain 7a89b05fa7ebfbb9dd798a7dbd888c0550beb838
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7a89b05fa7ebfbb9dd798a7dbd888c0550beb838" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/savish/rcomm
[INFO] finished tweaking git repo https://github.com/savish/rcomm
[INFO] tweaked toml for git repo https://github.com/savish/rcomm written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/savish/rcomm 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" "+7a89b05fa7ebfbb9dd798a7dbd888c0550beb838" "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:e2a9e7e193985ba0d5a8221c3984785a9e0a75acc409a02815633ff67a1f464e" "/opt/rustwide/cargo-home/bin/cargo" "+7a89b05fa7ebfbb9dd798a7dbd888c0550beb838" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d77847b9328c24d5aab978b5e8fc8ea97a5cd28596891bcedc2e00cb129b799
[INFO] running `Command { std: "docker" "start" "-a" "5d77847b9328c24d5aab978b5e8fc8ea97a5cd28596891bcedc2e00cb129b799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d77847b9328c24d5aab978b5e8fc8ea97a5cd28596891bcedc2e00cb129b799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d77847b9328c24d5aab978b5e8fc8ea97a5cd28596891bcedc2e00cb129b799", kill_on_drop: false }`
[INFO] [stdout] 5d77847b9328c24d5aab978b5e8fc8ea97a5cd28596891bcedc2e00cb129b799
[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:e2a9e7e193985ba0d5a8221c3984785a9e0a75acc409a02815633ff67a1f464e" "/opt/rustwide/cargo-home/bin/cargo" "+7a89b05fa7ebfbb9dd798a7dbd888c0550beb838" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 967ed2250cc4acf35dcc8dce803a444a6b33944313bc07d38e8431d4d7c984ed
[INFO] running `Command { std: "docker" "start" "-a" "967ed2250cc4acf35dcc8dce803a444a6b33944313bc07d38e8431d4d7c984ed", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking libc v0.2.41
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr] thread 'rustc' panicked at 'assertion failed: pos.get() <= self.position()', compiler/rustc_metadata/src/rmeta/encoder.rs:435:9
[INFO] [stderr] error: could not compile `libc` (lib)
[INFO] running `Command { std: "docker" "inspect" "967ed2250cc4acf35dcc8dce803a444a6b33944313bc07d38e8431d4d7c984ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "967ed2250cc4acf35dcc8dce803a444a6b33944313bc07d38e8431d4d7c984ed", kill_on_drop: false }`
[INFO] [stdout] 967ed2250cc4acf35dcc8dce803a444a6b33944313bc07d38e8431d4d7c984ed