[INFO] fetching crate saltyrtc-client 0.9.0...
[INFO] checking saltyrtc-client-0.9.0 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate saltyrtc-client 0.9.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate saltyrtc-client 0.9.0 on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate saltyrtc-client 0.9.0
[INFO] finished tweaking crates.io crate saltyrtc-client 0.9.0
[INFO] tweaked toml for crates.io crate saltyrtc-client 0.9.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate saltyrtc-client 0.9.0 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xsalsa20poly1305 v0.8.0
[INFO] [stderr]   Downloaded websocket v0.26.5
[INFO] [stderr]   Downloaded rmpv v0.4.7
[INFO] [stderr]   Downloaded tokio-tls v0.2.1
[INFO] [stderr]   Downloaded tokio-timer v0.1.2
[INFO] [stderr]   Downloaded websocket-base v0.26.5
[INFO] [stderr]   Downloaded poly1305 v0.7.2
[INFO] [stderr]   Downloaded rmp v0.8.11
[INFO] [stderr]   Downloaded chacha20poly1305 v0.9.1
[INFO] [stderr]   Downloaded x25519-dalek v1.2.0
[INFO] [stderr]   Downloaded chacha20 v0.8.2
[INFO] [stderr]   Downloaded crypto_box v0.7.2
[INFO] [stderr]   Downloaded thread-id v4.0.0
[INFO] [stderr]   Downloaded log4rs v1.1.1
[INFO] [stderr]   Downloaded rmp-serde v0.13.7
[INFO] [stderr]   Downloaded iana-time-zone v0.1.50
[INFO] [stderr]   Downloaded salsa20 v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1cd95845449e30ecf3f42c69c5d90336fcbbe95222a5b6a6ce9c5b802504dbbe
[INFO] running `Command { std: "docker" "start" "-a" "1cd95845449e30ecf3f42c69c5d90336fcbbe95222a5b6a6ce9c5b802504dbbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cd95845449e30ecf3f42c69c5d90336fcbbe95222a5b6a6ce9c5b802504dbbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cd95845449e30ecf3f42c69c5d90336fcbbe95222a5b6a6ce9c5b802504dbbe", kill_on_drop: false }`
[INFO] [stdout] 1cd95845449e30ecf3f42c69c5d90336fcbbe95222a5b6a6ce9c5b802504dbbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73797e67a84c52ae216a1eda79e8e8c2e131b5762aac3d747a2551f1ba4d497a
[INFO] running `Command { std: "docker" "start" "-a" "73797e67a84c52ae216a1eda79e8e8c2e131b5762aac3d747a2551f1ba4d497a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.44
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.44/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 semver v0.9.0
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[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" "73797e67a84c52ae216a1eda79e8e8c2e131b5762aac3d747a2551f1ba4d497a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73797e67a84c52ae216a1eda79e8e8c2e131b5762aac3d747a2551f1ba4d497a", kill_on_drop: false }`
[INFO] [stdout] 73797e67a84c52ae216a1eda79e8e8c2e131b5762aac3d747a2551f1ba4d497a
[INFO] checking saltyrtc-client-0.9.0 against try#dae34b759e282c069aa28752564694effd121a63 for pr-125384
[INFO] extracting crate saltyrtc-client 0.9.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate saltyrtc-client 0.9.0 on toolchain dae34b759e282c069aa28752564694effd121a63
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate saltyrtc-client 0.9.0
[INFO] finished tweaking crates.io crate saltyrtc-client 0.9.0
[INFO] tweaked toml for crates.io crate saltyrtc-client 0.9.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate saltyrtc-client 0.9.0 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" "+dae34b759e282c069aa28752564694effd121a63" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e83ec612ab6290219fbd4042e11d6b297b4e809244e8ab38ad810bb75eea09a8
[INFO] running `Command { std: "docker" "start" "-a" "e83ec612ab6290219fbd4042e11d6b297b4e809244e8ab38ad810bb75eea09a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e83ec612ab6290219fbd4042e11d6b297b4e809244e8ab38ad810bb75eea09a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e83ec612ab6290219fbd4042e11d6b297b4e809244e8ab38ad810bb75eea09a8", kill_on_drop: false }`
[INFO] [stdout] e83ec612ab6290219fbd4042e11d6b297b4e809244e8ab38ad810bb75eea09a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffd9e9d4fe562e29307abe904fe26bc3a608089817660ad6595817847ad034ba
[INFO] running `Command { std: "docker" "start" "-a" "ffd9e9d4fe562e29307abe904fe26bc3a608089817660ad6595817847ad034ba", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "ffd9e9d4fe562e29307abe904fe26bc3a608089817660ad6595817847ad034ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffd9e9d4fe562e29307abe904fe26bc3a608089817660ad6595817847ad034ba", kill_on_drop: false }`
[INFO] [stdout] ffd9e9d4fe562e29307abe904fe26bc3a608089817660ad6595817847ad034ba