[INFO] cloning repository https://github.com/xizheyin/interpreter_in_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xizheyin/interpreter_in_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxizheyin%2Finterpreter_in_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxizheyin%2Finterpreter_in_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d5a826c89aa8dc2c5859947304cad08eddce08c
[INFO] checking xizheyin/interpreter_in_rust against try#c8085cfed34c45021fc8f66d073f6394b3e35431 for pr-148939
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxizheyin%2Finterpreter_in_rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/xizheyin/interpreter_in_rust
[INFO] finished tweaking git repo https://github.com/xizheyin/interpreter_in_rust
[INFO] tweaked toml for git repo https://github.com/xizheyin/interpreter_in_rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/xizheyin/interpreter_in_rust on toolchain c8085cfed34c45021fc8f66d073f6394b3e35431
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/xizheyin/interpreter_in_rust 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" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b56d6c4d9b4a6b8d187c4b3c4859cf2d1f7004ea4e2ea52b7808e3b969e0c5e
[INFO] running `Command { std: "docker" "start" "-a" "2b56d6c4d9b4a6b8d187c4b3c4859cf2d1f7004ea4e2ea52b7808e3b969e0c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b56d6c4d9b4a6b8d187c4b3c4859cf2d1f7004ea4e2ea52b7808e3b969e0c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b56d6c4d9b4a6b8d187c4b3c4859cf2d1f7004ea4e2ea52b7808e3b969e0c5e", kill_on_drop: false }`
[INFO] [stdout] 2b56d6c4d9b4a6b8d187c4b3c4859cf2d1f7004ea4e2ea52b7808e3b969e0c5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c24140c484c1f329a7b7f687d45ff153eee94e29e022667a005cf8a2995b48c
[INFO] running `Command { std: "docker" "start" "-a" "3c24140c484c1f329a7b7f687d45ff153eee94e29e022667a005cf8a2995b48c", kill_on_drop: false }`
[INFO] [stderr]     Checking tracing-core v0.1.33
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `VarDef` is never constructed
[INFO] [stdout]   --> src/ast.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub enum Value {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 71 |     VarDef(String, Object),   // 变量定义
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Value` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_instance` is never used
[INFO] [stdout]   --> src/ast.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 76 | impl Value {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 92 |     pub fn as_instance(&self) -> Option<Instance> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new_variable` and `new_function_def` are never used
[INFO] [stdout]    --> src/ast.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 101 | impl Value {
[INFO] [stdout]     | ---------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn new_variable(name: String, value: Object) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 118 |     pub fn new_function_def(func: FunctionDef) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `VarDef` is never constructed
[INFO] [stdout]   --> src/ast.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub enum Value {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 71 |     VarDef(String, Object),   // 变量定义
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Value` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_instance` is never used
[INFO] [stdout]   --> src/ast.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 76 | impl Value {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 92 |     pub fn as_instance(&self) -> Option<Instance> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new_variable` and `new_function_def` are never used
[INFO] [stdout]    --> src/ast.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 101 | impl Value {
[INFO] [stdout]     | ---------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn new_variable(name: String, value: Object) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 118 |     pub fn new_function_def(func: FunctionDef) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.25s
[INFO] running `Command { std: "docker" "inspect" "3c24140c484c1f329a7b7f687d45ff153eee94e29e022667a005cf8a2995b48c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c24140c484c1f329a7b7f687d45ff153eee94e29e022667a005cf8a2995b48c", kill_on_drop: false }`
[INFO] [stdout] 3c24140c484c1f329a7b7f687d45ff153eee94e29e022667a005cf8a2995b48c