[INFO] fetching crate skyway-webrtc-gateway-caller 0.2.1...
[INFO] checking skyway-webrtc-gateway-caller-0.2.1 against master#6162f6f12339aa81fe16b8a64644ead497e411b2 for pr-113240
[INFO] extracting crate skyway-webrtc-gateway-caller 0.2.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate skyway-webrtc-gateway-caller 0.2.1 on toolchain 6162f6f12339aa81fe16b8a64644ead497e411b2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate skyway-webrtc-gateway-caller 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate skyway-webrtc-gateway-caller 0.2.1
[INFO] tweaked toml for crates.io crate skyway-webrtc-gateway-caller 0.2.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate skyway-webrtc-gateway-caller 0.2.1 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" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.19
[INFO] [stderr]   Downloaded dotenv_codegen_implementation v0.15.0
[INFO] [stderr]   Downloaded num_cpus v1.14.0
[INFO] [stderr]   Downloaded dotenv_codegen v0.15.0
[INFO] [stderr]   Downloaded futures-executor v0.3.25
[INFO] [stderr]   Downloaded mockito v0.31.0
[INFO] [stderr]   Downloaded rustc-demangle v0.1.21
[INFO] [stderr]   Downloaded tokio-stream v0.1.11
[INFO] [stderr]   Downloaded parking_lot_core v0.9.4
[INFO] [stderr]   Downloaded backtrace v0.3.66
[INFO] [stderr]   Downloaded windows_x86_64_gnullvm v0.42.0
[INFO] [stderr]   Downloaded windows_i686_gnu v0.42.0
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.42.0
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.42.0
[INFO] [stderr]   Downloaded syn v1.0.103
[INFO] [stderr]   Downloaded skyway-webrtc-gateway-api v0.2.1
[INFO] [stderr]   Downloaded libc v0.2.137
[INFO] [stderr]   Downloaded regex v1.7.0
[INFO] [stderr]   Downloaded gimli v0.26.2
[INFO] [stderr]   Downloaded object v0.29.0
[INFO] [stderr]   Downloaded windows_aarch64_gnullvm v0.42.0
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.42.0
[INFO] [stderr]   Downloaded windows_i686_msvc v0.42.0
[INFO] [stderr]   Downloaded futures v0.3.25
[INFO] [stderr]   Downloaded serde_json v1.0.87
[INFO] [stderr]   Downloaded mockall_derive v0.11.3
[INFO] [stderr]   Downloaded similar v2.2.0
[INFO] [stderr]   Downloaded cc v1.0.76
[INFO] [stderr]   Downloaded openssl-sys v0.9.77
[INFO] [stderr]   Downloaded anyhow v1.0.66
[INFO] [stderr]   Downloaded addr2line v0.17.0
[INFO] [stderr]   Downloaded async-trait v0.1.58
[INFO] [stderr]   Downloaded fragile v2.0.0
[INFO] [stderr]   Downloaded normalize-line-endings v0.3.0
[INFO] [stderr]   Downloaded predicates v2.1.2
[INFO] [stderr]   Downloaded termtree v0.4.0
[INFO] [stderr]   Downloaded predicates-tree v1.0.6
[INFO] [stderr]   Downloaded mockall v0.11.3
[INFO] [stderr]   Downloaded shaku_derive v0.6.1
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[INFO] [stderr]   Downloaded futures-macro v0.3.25
[INFO] [stderr]   Downloaded ipnet v2.5.1
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[INFO] [stderr]   Downloaded serde_derive v1.0.147
[INFO] [stderr]   Downloaded serde v1.0.147
[INFO] [stderr]   Downloaded proc-macro2 v1.0.47
[INFO] [stderr]   Downloaded downcast v0.11.0
[INFO] [stderr]   Downloaded difflib v0.4.0
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[INFO] [stderr]   Downloaded predicates-core v1.0.4
[INFO] [stderr]   Downloaded mockall_double v0.3.0
[INFO] [stderr]   Downloaded anymap v0.12.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39bde4b2f3bc0e1decd72a168601e352a6acbd7e94cda57cf4995cc02f561f1a
[INFO] running `Command { std: "docker" "start" "-a" "39bde4b2f3bc0e1decd72a168601e352a6acbd7e94cda57cf4995cc02f561f1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39bde4b2f3bc0e1decd72a168601e352a6acbd7e94cda57cf4995cc02f561f1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39bde4b2f3bc0e1decd72a168601e352a6acbd7e94cda57cf4995cc02f561f1a", kill_on_drop: false }`
[INFO] [stdout] 39bde4b2f3bc0e1decd72a168601e352a6acbd7e94cda57cf4995cc02f561f1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5d2a8f4cbedee2cc7293963e3f86545427de4c43783f22fcdc67130889f3c9f
[INFO] running `Command { std: "docker" "start" "-a" "c5d2a8f4cbedee2cc7293963e3f86545427de4c43783f22fcdc67130889f3c9f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling cc v1.0.76
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]     Checking itoa v1.0.4
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.47/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c5d2a8f4cbedee2cc7293963e3f86545427de4c43783f22fcdc67130889f3c9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5d2a8f4cbedee2cc7293963e3f86545427de4c43783f22fcdc67130889f3c9f", kill_on_drop: false }`
[INFO] [stdout] c5d2a8f4cbedee2cc7293963e3f86545427de4c43783f22fcdc67130889f3c9f