[INFO] cloning repository https://github.com/dorakueyon/rust-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/dorakueyon/rust-json-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdorakueyon%2Frust-json-parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdorakueyon%2Frust-json-parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 49b1c4aa9cc946dcc9427b35a1515a0f15183830
[INFO] building dorakueyon/rust-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%2Fdorakueyon%2Frust-json-parser" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dorakueyon/rust-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/dorakueyon/rust-json-parser
[INFO] finished tweaking git repo https://github.com/dorakueyon/rust-json-parser
[INFO] tweaked toml for git repo https://github.com/dorakueyon/rust-json-parser written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dorakueyon/rust-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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1d40bf5fd2fb10a2da4d743132bbdbc92644adc92549bf1a071569e5069c7da0
[INFO] running `Command { std: "docker" "start" "-a" "1d40bf5fd2fb10a2da4d743132bbdbc92644adc92549bf1a071569e5069c7da0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d40bf5fd2fb10a2da4d743132bbdbc92644adc92549bf1a071569e5069c7da0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d40bf5fd2fb10a2da4d743132bbdbc92644adc92549bf1a071569e5069c7da0", kill_on_drop: false }`
[INFO] [stdout] 1d40bf5fd2fb10a2da4d743132bbdbc92644adc92549bf1a071569e5069c7da0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 90e152ad376e227544f84625808e90443b9d858ffa9d5b4afbc8a84d293861c2
[INFO] running `Command { std: "docker" "start" "-a" "90e152ad376e227544f84625808e90443b9d858ffa9d5b4afbc8a84d293861c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-json-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `WhiteSpace` and `Eof` are never constructed
[INFO] [stdout]   --> src/lexer.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | pub enum Token {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 3  |     WhiteSpace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LexerError` is never constructed
[INFO] [stdout]   --> src/lexer.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct LexerError {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LexerError` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lexer.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl LexerError {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 25 |     pub fn new(msg: &str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "90e152ad376e227544f84625808e90443b9d858ffa9d5b4afbc8a84d293861c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90e152ad376e227544f84625808e90443b9d858ffa9d5b4afbc8a84d293861c2", kill_on_drop: false }`
[INFO] [stdout] 90e152ad376e227544f84625808e90443b9d858ffa9d5b4afbc8a84d293861c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 04c67a61786ab81b4a08cb4016a2a7bfda794f62e324a36d7e380eae515c6ad9
[INFO] running `Command { std: "docker" "start" "-a" "04c67a61786ab81b4a08cb4016a2a7bfda794f62e324a36d7e380eae515c6ad9", kill_on_drop: false }`
[INFO] [stdout] warning: variants `WhiteSpace` and `Eof` are never constructed
[INFO] [stdout]   --> src/lexer.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | pub enum Token {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 3  |     WhiteSpace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LexerError` is never constructed
[INFO] [stdout]   --> src/lexer.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct LexerError {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LexerError` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lexer.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl LexerError {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 25 |     pub fn new(msg: &str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-json-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `WhiteSpace` and `Eof` are never constructed
[INFO] [stdout]   --> src/lexer.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | pub enum Token {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 3  |     WhiteSpace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LexerError` is never constructed
[INFO] [stdout]   --> src/lexer.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct LexerError {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LexerError` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lexer.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl LexerError {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 25 |     pub fn new(msg: &str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "04c67a61786ab81b4a08cb4016a2a7bfda794f62e324a36d7e380eae515c6ad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04c67a61786ab81b4a08cb4016a2a7bfda794f62e324a36d7e380eae515c6ad9", kill_on_drop: false }`
[INFO] [stdout] 04c67a61786ab81b4a08cb4016a2a7bfda794f62e324a36d7e380eae515c6ad9