[INFO] cloning repository https://github.com/will-hart/markdown-browser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/will-hart/markdown-browser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwill-hart%2Fmarkdown-browser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwill-hart%2Fmarkdown-browser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef8bf7c53112c4b393b8fb03ddb1fd67971f99b6
[INFO] checking will-hart/markdown-browser against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwill-hart%2Fmarkdown-browser" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/will-hart/markdown-browser 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/will-hart/markdown-browser
[INFO] finished tweaking git repo https://github.com/will-hart/markdown-browser
[INFO] tweaked toml for git repo https://github.com/will-hart/markdown-browser written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/will-hart/markdown-browser 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded boxfnonce v0.1.0
[INFO] [stderr]   Downloaded ryu v0.2.4
[INFO] [stderr]   Downloaded quote v0.6.6
[INFO] [stderr]   Downloaded serde_json v1.0.26
[INFO] [stderr]   Downloaded proc-macro2 v0.4.13
[INFO] [stderr]   Downloaded serde_derive v1.0.72
[INFO] [stderr]   Downloaded serde v1.0.72
[INFO] [stderr]   Downloaded webview-sys v0.1.1
[INFO] [stderr]   Downloaded web-view v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 821d4d18651f182eec80a745be7cbab48ddf2e36b4281c865ee426ef92db2c4d
[INFO] running `Command { std: "docker" "start" "-a" "821d4d18651f182eec80a745be7cbab48ddf2e36b4281c865ee426ef92db2c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "821d4d18651f182eec80a745be7cbab48ddf2e36b4281c865ee426ef92db2c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "821d4d18651f182eec80a745be7cbab48ddf2e36b4281c865ee426ef92db2c4d", kill_on_drop: false }`
[INFO] [stdout] 821d4d18651f182eec80a745be7cbab48ddf2e36b4281c865ee426ef92db2c4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] bd95ad82a6d245a9a2efaceabdbae7126f83bb3ad180b3d77d427c8e7561f86d
[INFO] running `Command { std: "docker" "start" "-a" "bd95ad82a6d245a9a2efaceabdbae7126f83bb3ad180b3d77d427c8e7561f86d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling cc v1.0.18
[INFO] [stderr]    Compiling pkg-config v0.3.13
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]    Compiling ryu v0.2.4
[INFO] [stderr]    Compiling serde v1.0.72
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]     Checking itoa v0.4.2
[INFO] [stderr]     Checking urlencoding v1.0.0
[INFO] [stderr]     Checking boxfnonce v0.1.0
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]    Compiling webview-sys v0.1.1
[INFO] [stderr]    Compiling quote v0.6.6
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking web-view v0.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.72
[INFO] [stderr]     Checking serde_json v1.0.26
[INFO] [stderr]     Checking rs-markdown-browser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.51s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "bd95ad82a6d245a9a2efaceabdbae7126f83bb3ad180b3d77d427c8e7561f86d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd95ad82a6d245a9a2efaceabdbae7126f83bb3ad180b3d77d427c8e7561f86d", kill_on_drop: false }`
[INFO] [stdout] bd95ad82a6d245a9a2efaceabdbae7126f83bb3ad180b3d77d427c8e7561f86d