[INFO] cloning repository https://github.com/bobby-palmer/lcc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bobby-palmer/lcc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbobby-palmer%2Flcc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbobby-palmer%2Flcc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f05f7d1aa5f39759a88b0089d982a8bedc7dd12a
[INFO] checking bobby-palmer/lcc against try#b8ee37b59c6e1f39bae18b85e057975ab0d89308 for pr-139587-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbobby-palmer%2Flcc" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bobby-palmer/lcc on toolchain b8ee37b59c6e1f39bae18b85e057975ab0d89308
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bobby-palmer/lcc
[INFO] finished tweaking git repo https://github.com/bobby-palmer/lcc
[INFO] tweaked toml for git repo https://github.com/bobby-palmer/lcc written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/bobby-palmer/lcc 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" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 393b014634aa59195b91dd07d023169955cea0509bddcdb4d4d6e2da0d9c2669
[INFO] running `Command { std: "docker" "start" "-a" "393b014634aa59195b91dd07d023169955cea0509bddcdb4d4d6e2da0d9c2669", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "393b014634aa59195b91dd07d023169955cea0509bddcdb4d4d6e2da0d9c2669", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "393b014634aa59195b91dd07d023169955cea0509bddcdb4d4d6e2da0d9c2669", kill_on_drop: false }`
[INFO] [stdout] 393b014634aa59195b91dd07d023169955cea0509bddcdb4d4d6e2da0d9c2669
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4640dccd376e7a6bc64f786623d18ff34d3e2bc36f9d0a20199e4eb8f9f6d234
[INFO] running `Command { std: "docker" "start" "-a" "4640dccd376e7a6bc64f786623d18ff34d3e2bc36f9d0a20199e4eb8f9f6d234", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.168
[INFO] [stderr]     Checking adler2 v2.0.0
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]     Checking gimli v0.31.1
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking rustc-demangle v0.1.24
[INFO] [stderr]     Checking rusty_parser v1.1.0
[INFO] [stderr]     Checking miniz_oxide v0.8.0
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking object v0.36.5
[INFO] [stderr]     Checking addr2line v0.24.2
[INFO] [stderr]     Checking backtrace v0.3.74
[INFO] [stderr]     Checking lcc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `MEM_SIZE` is never used
[INFO] [stdout]  --> src/lc2k.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const MEM_SIZE: usize = 65536;
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NUM_REG` is never used
[INFO] [stdout]  --> src/lc2k.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub const NUM_REG: usize = 8;
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Register` is never constructed
[INFO] [stdout]  --> src/lc2k.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Register(usize);
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Register` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_str` is never used
[INFO] [stdout]  --> src/lc2k.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Register {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 8 |     pub fn from_str(src: &str) -> Self {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Address` is never used
[INFO] [stdout]   --> src/lc2k.rs:18:10
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub enum Address {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Address` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_str` is never used
[INFO] [stdout]   --> src/lc2k.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Address {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 24 |     pub fn from_str(src: &str) -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Instruction` is never used
[INFO] [stdout]   --> src/lc2k.rs:35:10
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub enum Instruction {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse` is never used
[INFO] [stdout]   --> src/lc2k.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn parse(src: &str) -> Vec<(Option<String>, Instruction)> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MEM_SIZE` is never used
[INFO] [stdout]  --> src/lc2k.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const MEM_SIZE: usize = 65536;
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/lc2k.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Register(usize);
[INFO] [stdout]   |            -------- ^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Register` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lc2k.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Literal(i32),
[INFO] [stdout]    |     ------- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Address` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 19 -     Literal(i32),
[INFO] [stdout] 19 +     Literal(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lc2k.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Symbol(String),
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Address` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 20 -     Symbol(String),
[INFO] [stdout] 20 +     Symbol(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/lc2k.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     Add(Register, Register, Register),
[INFO] [stdout]    |     --- ^^^^^^^^  ^^^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 36 -     Add(Register, Register, Register),
[INFO] [stdout] 36 +     Add((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/lc2k.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     Nor(Register, Register, Register),
[INFO] [stdout]    |     --- ^^^^^^^^  ^^^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 37 -     Nor(Register, Register, Register),
[INFO] [stdout] 37 +     Nor((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/lc2k.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     Lw(Register, Register, Address),
[INFO] [stdout]    |     -- ^^^^^^^^  ^^^^^^^^  ^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 39 -     Lw(Register, Register, Address),
[INFO] [stdout] 39 +     Lw((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/lc2k.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Sw(Register, Register, Address),
[INFO] [stdout]    |     -- ^^^^^^^^  ^^^^^^^^  ^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 40 -     Sw(Register, Register, Address),
[INFO] [stdout] 40 +     Sw((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/lc2k.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Beq(Register, Register, Address),
[INFO] [stdout]    |     --- ^^^^^^^^  ^^^^^^^^  ^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 41 -     Beq(Register, Register, Address),
[INFO] [stdout] 41 +     Beq((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/lc2k.rs:43:10
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Jalr(Register, Register),
[INFO] [stdout]    |     ---- ^^^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 43 -     Jalr(Register, Register),
[INFO] [stdout] 43 +     Jalr((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lc2k.rs:48:10
[INFO] [stdout]    |
[INFO] [stdout] 48 |     Fill(i32),
[INFO] [stdout]    |     ---- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 48 -     Fill(i32),
[INFO] [stdout] 48 +     Fill(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.41s
[INFO] running `Command { std: "docker" "inspect" "4640dccd376e7a6bc64f786623d18ff34d3e2bc36f9d0a20199e4eb8f9f6d234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4640dccd376e7a6bc64f786623d18ff34d3e2bc36f9d0a20199e4eb8f9f6d234", kill_on_drop: false }`
[INFO] [stdout] 4640dccd376e7a6bc64f786623d18ff34d3e2bc36f9d0a20199e4eb8f9f6d234