[INFO] fetching crate weakjson 0.0.7...
[INFO] checking weakjson-0.0.7 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate weakjson 0.0.7 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate weakjson 0.0.7 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 weakjson 0.0.7
[INFO] finished tweaking crates.io crate weakjson 0.0.7
[INFO] tweaked toml for crates.io crate weakjson 0.0.7 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 7948ff7e4d30750d30703c5e5759be04127db5a9c3e35aaeacb6fad349fd4b81
[INFO] running `Command { std: "docker" "start" "-a" "7948ff7e4d30750d30703c5e5759be04127db5a9c3e35aaeacb6fad349fd4b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7948ff7e4d30750d30703c5e5759be04127db5a9c3e35aaeacb6fad349fd4b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7948ff7e4d30750d30703c5e5759be04127db5a9c3e35aaeacb6fad349fd4b81", kill_on_drop: false }`
[INFO] [stdout] 7948ff7e4d30750d30703c5e5759be04127db5a9c3e35aaeacb6fad349fd4b81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 88666a25028842890fe1141e66863c16add5511bf241dd10ced0e4c7c0721333
[INFO] running `Command { std: "docker" "start" "-a" "88666a25028842890fe1141e66863c16add5511bf241dd10ced0e4c7c0721333", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking weakjson v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0573]: expected type, found variant `String`
[INFO] [stdout]   --> src/weak_tests.rs:11:24
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn mk_object(items: &[(String, Json)]) -> Json {
[INFO] [stdout]    |                        ^^^^^^ not a type
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct instead
[INFO] [stdout]    |
[INFO] [stdout] 1  + use std::string::String;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0573`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `weakjson` (lib test) due to 2 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "88666a25028842890fe1141e66863c16add5511bf241dd10ced0e4c7c0721333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88666a25028842890fe1141e66863c16add5511bf241dd10ced0e4c7c0721333", kill_on_drop: false }`
[INFO] [stdout] 88666a25028842890fe1141e66863c16add5511bf241dd10ced0e4c7c0721333