[INFO] cloning repository https://github.com/11Takanori/rtc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/11Takanori/rtc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F11Takanori%2Frtc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F11Takanori%2Frtc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 172b2be1a732c1edbf0cdbddca39e250bf48f099
[INFO] checking 11Takanori/rtc against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F11Takanori%2Frtc" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/11Takanori/rtc 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/11Takanori/rtc
[INFO] finished tweaking git repo https://github.com/11Takanori/rtc
[INFO] tweaked toml for git repo https://github.com/11Takanori/rtc written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/11Takanori/rtc 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]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-if v0.1.2
[INFO] [stderr]   Downloaded byteorder v1.2.1
[INFO] [stderr]   Downloaded bitflags v1.0.1
[INFO] [stderr]   Downloaded gcc v0.3.54
[INFO] [stderr]   Downloaded bytes v0.4.6
[INFO] [stderr]   Downloaded libc v0.2.36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 0ee9dba584931824a6db74763251d10debf429740a34cf39af51d064da11480a
[INFO] running `Command { std: "docker" "start" "-a" "0ee9dba584931824a6db74763251d10debf429740a34cf39af51d064da11480a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ee9dba584931824a6db74763251d10debf429740a34cf39af51d064da11480a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ee9dba584931824a6db74763251d10debf429740a34cf39af51d064da11480a", kill_on_drop: false }`
[INFO] [stdout] 0ee9dba584931824a6db74763251d10debf429740a34cf39af51d064da11480a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] dc3ce634a0b6c4edb695412093ddaebb0bd40005c3cdc3ca8126f0d38dac3fb4
[INFO] running `Command { std: "docker" "start" "-a" "dc3ce634a0b6c4edb695412093ddaebb0bd40005c3cdc3ca8126f0d38dac3fb4", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking rtc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `execv` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `execv` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fork` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `fork` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ForkResult` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `ForkResult` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `execv` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `execv` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fork` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `fork` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ForkResult` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `ForkResult` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.58s
[INFO] running `Command { std: "docker" "inspect" "dc3ce634a0b6c4edb695412093ddaebb0bd40005c3cdc3ca8126f0d38dac3fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc3ce634a0b6c4edb695412093ddaebb0bd40005c3cdc3ca8126f0d38dac3fb4", kill_on_drop: false }`
[INFO] [stdout] dc3ce634a0b6c4edb695412093ddaebb0bd40005c3cdc3ca8126f0d38dac3fb4
[INFO] checking 11Takanori/rtc against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F11Takanori%2Frtc" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/11Takanori/rtc on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/11Takanori/rtc
[INFO] finished tweaking git repo https://github.com/11Takanori/rtc
[INFO] tweaked toml for git repo https://github.com/11Takanori/rtc written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/11Takanori/rtc 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e57d02f0e2024ca8288c53d4b6da706be0e1a64b1480569c8b8f5ee197d3817
[INFO] running `Command { std: "docker" "start" "-a" "0e57d02f0e2024ca8288c53d4b6da706be0e1a64b1480569c8b8f5ee197d3817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e57d02f0e2024ca8288c53d4b6da706be0e1a64b1480569c8b8f5ee197d3817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e57d02f0e2024ca8288c53d4b6da706be0e1a64b1480569c8b8f5ee197d3817", kill_on_drop: false }`
[INFO] [stdout] 0e57d02f0e2024ca8288c53d4b6da706be0e1a64b1480569c8b8f5ee197d3817
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7db555d32ead3b92d816df34dfd6a1406697be5af31cebac1a5e233244a0505
[INFO] running `Command { std: "docker" "start" "-a" "d7db555d32ead3b92d816df34dfd6a1406697be5af31cebac1a5e233244a0505", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking rtc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `execv` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `execv` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fork` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `fork` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ForkResult` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `ForkResult` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `execv` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `execv` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fork` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `fork` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ForkResult` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nix::unistd::*;
[INFO] [stdout]   |     -------------- the item `ForkResult` is already imported here
[INFO] [stdout] 7 | use nix::unistd::{execv, fork, ForkResult};
[INFO] [stdout]   |                                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.59s
[INFO] running `Command { std: "docker" "inspect" "d7db555d32ead3b92d816df34dfd6a1406697be5af31cebac1a5e233244a0505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7db555d32ead3b92d816df34dfd6a1406697be5af31cebac1a5e233244a0505", kill_on_drop: false }`
[INFO] [stdout] d7db555d32ead3b92d816df34dfd6a1406697be5af31cebac1a5e233244a0505