[INFO] cloning repository https://github.com/d3jawu/kytherust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/d3jawu/kytherust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd3jawu%2Fkytherust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd3jawu%2Fkytherust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ae651aa926ba517169b7cf3198b040ccbdbcb9e3
[INFO] building d3jawu/kytherust 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%2Fd3jawu%2Fkytherust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/d3jawu/kytherust 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/d3jawu/kytherust
[INFO] finished tweaking git repo https://github.com/d3jawu/kytherust
[INFO] tweaked toml for git repo https://github.com/d3jawu/kytherust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/d3jawu/kytherust 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] d1d72128255cd01e2bbbec8d77ad2c7d97e96988258972daf40d9944c18d4599
[INFO] running `Command { std: "docker" "start" "-a" "d1d72128255cd01e2bbbec8d77ad2c7d97e96988258972daf40d9944c18d4599", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1d72128255cd01e2bbbec8d77ad2c7d97e96988258972daf40d9944c18d4599", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1d72128255cd01e2bbbec8d77ad2c7d97e96988258972daf40d9944c18d4599", kill_on_drop: false }`
[INFO] [stdout] d1d72128255cd01e2bbbec8d77ad2c7d97e96988258972daf40d9944c18d4599
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 86b57fb55a54350ca6b01d866e26c3ef487ef2d17b8359d274b782dc56e994ee
[INFO] running `Command { std: "docker" "start" "-a" "86b57fb55a54350ca6b01d866e26c3ef487ef2d17b8359d274b782dc56e994ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling kytherust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/vm.rs:77:21
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 let a = self.stack.pop().expect("");
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/vm.rs:78:21
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 let b = self.stack.pop().expect("");
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/vm.rs:81:21
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 let f = self.stack.pop().expect("");
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/vm.rs:88:32
[INFO] [stdout]    |
[INFO] [stdout] 88 |             Instruction::Field(name) => {}
[INFO] [stdout]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_from_string` is never used
[INFO] [stdout]   --> src/input_stream.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl InputStream {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn new_from_string(contents: &str) -> InputStream {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `If`, `While`, and `When` are never constructed
[INFO] [stdout]   --> src/parser.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub enum AstNode {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 76 |     If {
[INFO] [stdout]    |     ^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     While {
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     When,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AstNode` 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: variant `String` is never constructed
[INFO] [stdout]    --> src/parser.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub enum Literal {
[INFO] [stdout]     |          ------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 108 |     String(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Literal` 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: struct `KytheraVal` is never constructed
[INFO] [stdout]  --> src/vm.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct KytheraVal {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `InternalVal` is never used
[INFO] [stdout]   --> src/vm.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum InternalVal {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Instruction` is never used
[INFO] [stdout]   --> src/vm.rs:19:6
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum Instruction {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Frame` is never constructed
[INFO] [stdout]   --> src/vm.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Frame {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `run`, and `step` are never used
[INFO] [stdout]   --> src/vm.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Frame {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 60 |     fn new(from: Vec<Instruction>) -> Frame {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     fn run(&mut self) {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 70 |
[INFO] [stdout] 71 |     fn step(&mut self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `Command { std: "docker" "inspect" "86b57fb55a54350ca6b01d866e26c3ef487ef2d17b8359d274b782dc56e994ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86b57fb55a54350ca6b01d866e26c3ef487ef2d17b8359d274b782dc56e994ee", kill_on_drop: false }`
[INFO] [stdout] 86b57fb55a54350ca6b01d866e26c3ef487ef2d17b8359d274b782dc56e994ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] bce5a940c5b34fbbf8d68c2e1f6f453311a570aa26e1f6796949ff15ea48795f
[INFO] running `Command { std: "docker" "start" "-a" "bce5a940c5b34fbbf8d68c2e1f6f453311a570aa26e1f6796949ff15ea48795f", kill_on_drop: false }`
[INFO] [stderr]    Compiling kytherust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::Error`
[INFO] [stdout]    --> src/tokenizer.rs:326:9
[INFO] [stdout]     |
[INFO] [stdout] 326 |     use std::io::Error;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/vm.rs:77:21
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 let a = self.stack.pop().expect("");
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/vm.rs:78:21
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 let b = self.stack.pop().expect("");
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/vm.rs:81:21
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 let f = self.stack.pop().expect("");
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/vm.rs:88:32
[INFO] [stdout]    |
[INFO] [stdout] 88 |             Instruction::Field(name) => {}
[INFO] [stdout]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `If`, `While`, and `When` are never constructed
[INFO] [stdout]   --> src/parser.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub enum AstNode {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 76 |     If {
[INFO] [stdout]    |     ^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     While {
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     When,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AstNode` 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: variant `String` is never constructed
[INFO] [stdout]    --> src/parser.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub enum Literal {
[INFO] [stdout]     |          ------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 108 |     String(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Literal` 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: struct `KytheraVal` is never constructed
[INFO] [stdout]  --> src/vm.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct KytheraVal {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `InternalVal` is never used
[INFO] [stdout]   --> src/vm.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum InternalVal {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Instruction` is never used
[INFO] [stdout]   --> src/vm.rs:19:6
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum Instruction {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Frame` is never constructed
[INFO] [stdout]   --> src/vm.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Frame {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `run`, and `step` are never used
[INFO] [stdout]   --> src/vm.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Frame {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 60 |     fn new(from: Vec<Instruction>) -> Frame {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     fn run(&mut self) {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 70 |
[INFO] [stdout] 71 |     fn step(&mut self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "bce5a940c5b34fbbf8d68c2e1f6f453311a570aa26e1f6796949ff15ea48795f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bce5a940c5b34fbbf8d68c2e1f6f453311a570aa26e1f6796949ff15ea48795f", kill_on_drop: false }`
[INFO] [stdout] bce5a940c5b34fbbf8d68c2e1f6f453311a570aa26e1f6796949ff15ea48795f