[INFO] cloning repository https://github.com/dunnock/rustfest-webrtc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dunnock/rustfest-webrtc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdunnock%2Frustfest-webrtc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdunnock%2Frustfest-webrtc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca602c59d904e326be92d568d0a83ddb0c84b5c6
[INFO] checking dunnock/rustfest-webrtc against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdunnock%2Frustfest-webrtc" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dunnock/rustfest-webrtc on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dunnock/rustfest-webrtc
[INFO] finished tweaking git repo https://github.com/dunnock/rustfest-webrtc
[INFO] tweaked toml for git repo https://github.com/dunnock/rustfest-webrtc written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/dunnock/rustfest-webrtc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/dbcfd/tokio-tungstenite`
[INFO] [stderr]     Updating git repository `https://github.com/snapview/tungstenite-rs`
[INFO] [stderr] warning: two git dependencies found for `https://github.com/snapview/tungstenite-rs.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded input_buffer v0.2.0
[INFO] [stderr]   Downloaded num-rational v0.2.2
[INFO] [stderr]   Downloaded proc-macro-error v0.2.6
[INFO] [stderr]   Downloaded structopt-derive v0.3.4
[INFO] [stderr]   Downloaded sha-1 v0.8.1
[INFO] [stderr]   Downloaded glib v0.8.2
[INFO] [stderr]   Downloaded futures-select-macro-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded anyhow v1.0.19
[INFO] [stderr]   Downloaded gstreamer v0.14.5
[INFO] [stderr]   Downloaded security-framework v0.3.3
[INFO] [stderr]   Downloaded unicode-normalization v0.1.9
[INFO] [stderr]   Downloaded tokio-fs v0.2.0-alpha.6
[INFO] [stderr]   Downloaded futures-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded structopt v0.3.4
[INFO] [stderr]   Downloaded gstreamer-sys v0.8.0
[INFO] [stderr]   Downloaded muldiv v0.2.0
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1090cd97d3ef83f1ce9d74b274d0c6abb4d62aee73c8f3f7fc24e0a51e0d4fc2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1090cd97d3ef83f1ce9d74b274d0c6abb4d62aee73c8f3f7fc24e0a51e0d4fc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1090cd97d3ef83f1ce9d74b274d0c6abb4d62aee73c8f3f7fc24e0a51e0d4fc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1090cd97d3ef83f1ce9d74b274d0c6abb4d62aee73c8f3f7fc24e0a51e0d4fc2", kill_on_drop: false }`
[INFO] [stdout] 1090cd97d3ef83f1ce9d74b274d0c6abb4d62aee73c8f3f7fc24e0a51e0d4fc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad0f238a41b7a24804864dbeb6165c28fa017bf59fb511095b1f387ecf702d6e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ad0f238a41b7a24804864dbeb6165c28fa017bf59fb511095b1f387ecf702d6e", kill_on_drop: false }`
[INFO] [stderr] warning: two git dependencies found for `https://github.com/snapview/tungstenite-rs.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent
[INFO] [stderr] warning: two git dependencies found for `https://github.com/snapview/tungstenite-rs.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]    Compiling unicode-segmentation v1.5.0
[INFO] [stderr]    Compiling anyhow v1.0.19
[INFO] [stderr]    Compiling gstreamer v0.14.5
[INFO] [stderr]     Checking muldiv v0.2.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling glib-sys v0.9.0
[INFO] [stderr]    Compiling gobject-sys v0.9.0
[INFO] [stderr]    Compiling gstreamer-sys v0.8.0
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling openssl-sys v0.9.52
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking tracing-core v0.1.7
[INFO] [stderr]     Checking num_cpus v1.11.0
[INFO] [stderr]     Checking getrandom v0.1.13
[INFO] [stderr]     Checking crossbeam-utils v0.7.0
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking unicode-normalization v0.1.9
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking http v0.1.19
[INFO] [stderr]     Checking input_buffer v0.2.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking glib v0.8.2
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking tungstenite v0.9.2 (https://github.com/snapview/tungstenite-rs#af1fe25e)
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling pin-project-internal v0.4.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.5
[INFO] [stderr]    Compiling structopt-derive v0.3.4
[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]    Compiling futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]     Checking structopt v0.3.4
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking tokio-io v0.2.0-alpha.6
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tokio-codec v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-tls v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-sync v0.2.0-alpha.6
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-net v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-timer v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-fs v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-tungstenite v0.10.0-alpha.1 (https://github.com/dbcfd/tokio-tungstenite?rev=tokio2#0c277996)
[INFO] [stderr]     Checking tokio v0.2.0-alpha.6
[INFO] [stderr]     Checking rustfest-webrtc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Context`
[INFO] [stdout]  --> src/main.rs:6:28
[INFO] [stdout]   |
[INFO] [stdout] 6 | use anyhow::{anyhow, bail, Context};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Context`
[INFO] [stdout]  --> src/main.rs:6:28
[INFO] [stdout]   |
[INFO] [stdout] 6 | use anyhow::{anyhow, bail, Context};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `upgrade`
[INFO] [stdout]   --> src/main.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn upgrade(&self) -> Option<App> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `downgrade`
[INFO] [stdout]   --> src/main.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn downgrade(&self) -> AppWeak {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `upgrade`
[INFO] [stdout]   --> src/main.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn upgrade(&self) -> Option<App> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `downgrade`
[INFO] [stdout]   --> src/main.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn downgrade(&self) -> AppWeak {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 24s
[INFO] running `Command { std: "docker" "inspect" "ad0f238a41b7a24804864dbeb6165c28fa017bf59fb511095b1f387ecf702d6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad0f238a41b7a24804864dbeb6165c28fa017bf59fb511095b1f387ecf702d6e", kill_on_drop: false }`
[INFO] [stdout] ad0f238a41b7a24804864dbeb6165c28fa017bf59fb511095b1f387ecf702d6e