[INFO] cloning repository https://github.com/j-artur/json-parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/j-artur/json-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj-artur%2Fjson-parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj-artur%2Fjson-parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6f5c354d6df21ef2427cda7c60200dc73e9a3c8e
[INFO] building j-artur/json-parser against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj-artur%2Fjson-parser" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/j-artur/json-parser on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/j-artur/json-parser
[INFO] finished tweaking git repo https://github.com/j-artur/json-parser
[INFO] tweaked toml for git repo https://github.com/j-artur/json-parser written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/j-artur/json-parser 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9c5fadafc328b434d4239b7a46bdf19e8c93e1461c65731aebd7feb36b4c64d
[INFO] running `Command { std: "docker" "start" "-a" "d9c5fadafc328b434d4239b7a46bdf19e8c93e1461c65731aebd7feb36b4c64d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9c5fadafc328b434d4239b7a46bdf19e8c93e1461c65731aebd7feb36b4c64d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9c5fadafc328b434d4239b7a46bdf19e8c93e1461c65731aebd7feb36b4c64d", kill_on_drop: false }`
[INFO] [stdout] d9c5fadafc328b434d4239b7a46bdf19e8c93e1461c65731aebd7feb36b4c64d
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e895552f7378213f3258325db7c8e2b84c165b3a20a41d9ec183f8c294d134c
[INFO] running `Command { std: "docker" "start" "-a" "6e895552f7378213f3258325db7c8e2b84c165b3a20a41d9ec183f8c294d134c", kill_on_drop: false }`
[INFO] [stderr]    Compiling json-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "6e895552f7378213f3258325db7c8e2b84c165b3a20a41d9ec183f8c294d134c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e895552f7378213f3258325db7c8e2b84c165b3a20a41d9ec183f8c294d134c", kill_on_drop: false }`
[INFO] [stdout] 6e895552f7378213f3258325db7c8e2b84c165b3a20a41d9ec183f8c294d134c
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 72351e00910c2eec16ed4d56c5e4fc4ceed673da202c2fa8266a3b6b3009179e
[INFO] running `Command { std: "docker" "start" "-a" "72351e00910c2eec16ed4d56c5e4fc4ceed673da202c2fa8266a3b6b3009179e", kill_on_drop: false }`
[INFO] [stderr]    Compiling json-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `string` found for enum `json::Json` in the current scope
[INFO] [stdout]    --> src/lib.rs:18:51
[INFO] [stdout]     |
[INFO] [stdout] 18  |                     println!("value: {:?}", value.string());
[INFO] [stdout]     |                                                   ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/json.rs:9:1
[INFO] [stdout]     |
[INFO] [stdout] 9   | pub enum Json {
[INFO] [stdout]     | ------------- method `string` not found for this enum
[INFO] [stdout] ...
[INFO] [stdout] 267 |     fn string(&self) -> Option<&String>;
[INFO] [stdout]     |        ------ the method is available for `json::Json` here
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `JsonValue` which provides `string` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 5   +     use crate::json::JsonValue;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a variant with a similar name (notice the capitalization difference)
[INFO] [stdout]     |
[INFO] [stdout] 18  |                     println!("value: {:?}", value.String());
[INFO] [stdout]     |                                                   ~~~~~~
[INFO] [stdout] help: there is a method `to_string` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 18  |                     println!("value: {:?}", value.to_string());
[INFO] [stdout]     |                                                   ~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `json-parser` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "72351e00910c2eec16ed4d56c5e4fc4ceed673da202c2fa8266a3b6b3009179e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72351e00910c2eec16ed4d56c5e4fc4ceed673da202c2fa8266a3b6b3009179e", kill_on_drop: false }`
[INFO] [stdout] 72351e00910c2eec16ed4d56c5e4fc4ceed673da202c2fa8266a3b6b3009179e