[INFO] fetching crate smooth-json 0.2.7...
[INFO] checking smooth-json-0.2.7 against try#87f2ecc56b5f6032b075c8934ebc77f28d57183c for pr-148190
[INFO] extracting crate smooth-json 0.2.7 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate smooth-json 0.2.7
[INFO] finished tweaking crates.io crate smooth-json 0.2.7
[INFO] tweaked toml for crates.io crate smooth-json 0.2.7 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate smooth-json 0.2.7 on toolchain 87f2ecc56b5f6032b075c8934ebc77f28d57183c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate smooth-json 0.2.7 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" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77d578de2908166a18b803a448b64bf74064e9a491413e229050bd572e0d7423
[INFO] running `Command { std: "docker" "start" "-a" "77d578de2908166a18b803a448b64bf74064e9a491413e229050bd572e0d7423", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77d578de2908166a18b803a448b64bf74064e9a491413e229050bd572e0d7423", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77d578de2908166a18b803a448b64bf74064e9a491413e229050bd572e0d7423", kill_on_drop: false }`
[INFO] [stdout] 77d578de2908166a18b803a448b64bf74064e9a491413e229050bd572e0d7423
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b739126a1918c3aa29324f1abc8dc0cb7c973dbd5865a4b94648ecfb6b6ea31a
[INFO] running `Command { std: "docker" "start" "-a" "b739126a1918c3aa29324f1abc8dc0cb7c973dbd5865a4b94648ecfb6b6ea31a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling serde_json v1.0.114
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]     Checking smooth-json v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:202:37
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 let new_val = json!(vec![v, obj]);
[INFO] [stdout]     |                                     ^^^^^^^^^^^^
[INFO] [stdout]     |                                     |
[INFO] [stdout]     |                                     types differ in mutability
[INFO] [stdout]     |                                     arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected array `[&mut Value; _]`
[INFO] [stdout]                found array `[&Value; 2]`
[INFO] [stdout] help: the return type of this call is `[&Value; 2]` due to the type of the argument passed
[INFO] [stdout]    --> src/lib.rs:202:37
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 let new_val = json!(vec![v, obj]);
[INFO] [stdout]     |                                     ^^^^^^^^^^^^ this argument influences the return type of `write_box_via_move`
[INFO] [stdout] note: function defined here
[INFO] [stdout]    --> /rustc/87f2ecc56b5f6032b075c8934ebc77f28d57183c/library/alloc/src/intrinsics.rs:15:7
[INFO] [stdout]     = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smooth-json` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:202:37
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 let new_val = json!(vec![v, obj]);
[INFO] [stdout]     |                                     ^^^^^^^^^^^^
[INFO] [stdout]     |                                     |
[INFO] [stdout]     |                                     types differ in mutability
[INFO] [stdout]     |                                     arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected array `[&mut serde_json::Value; _]`
[INFO] [stdout]                found array `[&serde_json::Value; 2]`
[INFO] [stdout] help: the return type of this call is `[&serde_json::Value; 2]` due to the type of the argument passed
[INFO] [stdout]    --> src/lib.rs:202:37
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 let new_val = json!(vec![v, obj]);
[INFO] [stdout]     |                                     ^^^^^^^^^^^^ this argument influences the return type of `write_box_via_move`
[INFO] [stdout] note: function defined here
[INFO] [stdout]    --> /rustc/87f2ecc56b5f6032b075c8934ebc77f28d57183c/library/alloc/src/intrinsics.rs:15:7
[INFO] [stdout]     = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smooth-json` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "b739126a1918c3aa29324f1abc8dc0cb7c973dbd5865a4b94648ecfb6b6ea31a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b739126a1918c3aa29324f1abc8dc0cb7c973dbd5865a4b94648ecfb6b6ea31a", kill_on_drop: false }`
[INFO] [stdout] b739126a1918c3aa29324f1abc8dc0cb7c973dbd5865a4b94648ecfb6b6ea31a