[INFO] fetching crate xml2json-rs 1.0.1...
[INFO] checking xml2json-rs-1.0.1 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate xml2json-rs 1.0.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate xml2json-rs 1.0.1 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xml2json-rs 1.0.1
[INFO] finished tweaking crates.io crate xml2json-rs 1.0.1
[INFO] tweaked toml for crates.io crate xml2json-rs 1.0.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 24 packages to latest compatible versions
[INFO] [stderr]       Adding indoc v1.0.9 (latest: v2.0.5)
[INFO] [stderr]       Adding quick-xml v0.23.1 (latest: v0.36.1)
[INFO] [stderr]       Adding yansi v0.5.1 (latest: v1.0.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9d128de04964ebee54ba8837e85aa6dbca3b3cfc298ac36386dd34454a9cd33d
[INFO] running `Command { std: "docker" "start" "-a" "9d128de04964ebee54ba8837e85aa6dbca3b3cfc298ac36386dd34454a9cd33d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d128de04964ebee54ba8837e85aa6dbca3b3cfc298ac36386dd34454a9cd33d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d128de04964ebee54ba8837e85aa6dbca3b3cfc298ac36386dd34454a9cd33d", kill_on_drop: false }`
[INFO] [stdout] 9d128de04964ebee54ba8837e85aa6dbca3b3cfc298ac36386dd34454a9cd33d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e02405a2ad39e15368db9b14509280a2559b5b49317ad7dd5f19630d468bd19
[INFO] running `Command { std: "docker" "start" "-a" "7e02405a2ad39e15368db9b14509280a2559b5b49317ad7dd5f19630d468bd19", kill_on_drop: false }`
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling serde_json v1.0.127
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]     Checking quick-xml v0.23.1
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking regex v1.10.6
[INFO] [stderr]     Checking xml2json-rs v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/json.rs:400:17
[INFO] [stdout]     |
[INFO] [stdout] 400 |     if let Some(mut last_node) = stack.last_mut() {
[INFO] [stdout]     |                 ----^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/json.rs:400:17
[INFO] [stdout]     |
[INFO] [stdout] 400 |     if let Some(mut last_node) = stack.last_mut() {
[INFO] [stdout]     |                 ----^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.52s
[INFO] running `Command { std: "docker" "inspect" "7e02405a2ad39e15368db9b14509280a2559b5b49317ad7dd5f19630d468bd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e02405a2ad39e15368db9b14509280a2559b5b49317ad7dd5f19630d468bd19", kill_on_drop: false }`
[INFO] [stdout] 7e02405a2ad39e15368db9b14509280a2559b5b49317ad7dd5f19630d468bd19