[INFO] cloning repository https://github.com/centricular/rtmp-slate-fallback
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/centricular/rtmp-slate-fallback" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcentricular%2Frtmp-slate-fallback", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcentricular%2Frtmp-slate-fallback'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ac68eed3ec3501e6057e615a78e59640941cf8f
[INFO] checking centricular/rtmp-slate-fallback against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcentricular%2Frtmp-slate-fallback" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/centricular/rtmp-slate-fallback
[INFO] finished tweaking git repo https://github.com/centricular/rtmp-slate-fallback
[INFO] tweaked toml for git repo https://github.com/centricular/rtmp-slate-fallback written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/centricular/rtmp-slate-fallback on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/centricular/rtmp-slate-fallback 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 188460801ebec5bef878c442b5b8c7747b627085deed6dc0045893d4cc3a0413
[INFO] running `Command { std: "docker" "start" "-a" "188460801ebec5bef878c442b5b8c7747b627085deed6dc0045893d4cc3a0413", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "188460801ebec5bef878c442b5b8c7747b627085deed6dc0045893d4cc3a0413", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "188460801ebec5bef878c442b5b8c7747b627085deed6dc0045893d4cc3a0413", kill_on_drop: false }`
[INFO] [stdout] 188460801ebec5bef878c442b5b8c7747b627085deed6dc0045893d4cc3a0413
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c0bb754ac71a1b08e99db81240a41151ad02f55c10d9ff33436a6ee0ccf4a91
[INFO] running `Command { std: "docker" "start" "-a" "1c0bb754ac71a1b08e99db81240a41151ad02f55c10d9ff33436a6ee0ccf4a91", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling proc-macro-hack v0.5.14
[INFO] [stderr]    Compiling glib-sys v0.9.1 (https://github.com/gtk-rs/sys#bac293d7)
[INFO] [stderr]    Compiling gobject-sys v0.9.1 (https://github.com/gtk-rs/sys#bac293d7)
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling anyhow v1.0.27
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling gstreamer-sys v0.9.0 (https://gitlab.freedesktop.org/gstreamer/gstreamer-rs-sys#0002f2e5)
[INFO] [stderr]     Checking futures-task v0.3.4
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]    Compiling gstreamer v0.16.0 (https://gitlab.freedesktop.org/gstreamer/gstreamer-rs#962da8a6)
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking muldiv v0.2.1
[INFO] [stderr]     Checking pretty-hex v0.1.1
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.14
[INFO] [stderr]    Compiling paste-impl v0.1.9
[INFO] [stderr]     Checking paste v0.1.9
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling structopt-derive v0.4.5
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking thiserror v1.0.14
[INFO] [stderr]    Compiling proc-macro-crate v0.1.4
[INFO] [stderr]    Compiling glib-macros v0.9.0 (https://github.com/gtk-rs/glib#4633ffd4)
[INFO] [stderr]     Checking structopt v0.3.12
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking glib v0.9.3 (https://github.com/gtk-rs/glib#4633ffd4)
[INFO] [stderr]     Checking rtmp-slate-fallback v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | /     #[structopt(long)]
[INFO] [stdout] 9 | |     live_rtmp_uri: String,
[INFO] [stdout]   | |_________________________^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rtmp-slate-fallback` (bin "rtmp-slate-fallback" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | /     #[structopt(long)]
[INFO] [stdout] 9 | |     live_rtmp_uri: String,
[INFO] [stdout]   | |_________________________^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rtmp-slate-fallback` (bin "rtmp-slate-fallback") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "1c0bb754ac71a1b08e99db81240a41151ad02f55c10d9ff33436a6ee0ccf4a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c0bb754ac71a1b08e99db81240a41151ad02f55c10d9ff33436a6ee0ccf4a91", kill_on_drop: false }`
[INFO] [stdout] 1c0bb754ac71a1b08e99db81240a41151ad02f55c10d9ff33436a6ee0ccf4a91