[INFO] cloning repository https://github.com/ztoufik/rust_vm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ztoufik/rust_vm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fztoufik%2Frust_vm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fztoufik%2Frust_vm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca50bcce28fb0dfcb8695c8ad094b2b235935c85
[INFO] checking ztoufik/rust_vm against master#96cfc75584359ae7ad11cc45968059f29e7b44b7 for pr-137728
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fztoufik%2Frust_vm" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ztoufik/rust_vm on toolchain 96cfc75584359ae7ad11cc45968059f29e7b44b7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ztoufik/rust_vm
[INFO] finished tweaking git repo https://github.com/ztoufik/rust_vm
[INFO] tweaked toml for git repo https://github.com/ztoufik/rust_vm written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ztoufik/rust_vm 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" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b943b18d2ce82d6b29c7dfce535462fe2ad314b1c2c667b8a96777d0ab1dd01
[INFO] running `Command { std: "docker" "start" "-a" "3b943b18d2ce82d6b29c7dfce535462fe2ad314b1c2c667b8a96777d0ab1dd01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b943b18d2ce82d6b29c7dfce535462fe2ad314b1c2c667b8a96777d0ab1dd01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b943b18d2ce82d6b29c7dfce535462fe2ad314b1c2c667b8a96777d0ab1dd01", kill_on_drop: false }`
[INFO] [stdout] 3b943b18d2ce82d6b29c7dfce535462fe2ad314b1c2c667b8a96777d0ab1dd01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96bc8dad6bf5d9149527540d810c59f3f92a8d8a3054bb376c06cc77ebf2c85b
[INFO] running `Command { std: "docker" "start" "-a" "96bc8dad6bf5d9149527540d810c59f3f92a8d8a3054bb376c06cc77ebf2c85b", kill_on_drop: false }`
[INFO] [stderr]     Checking vm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Cell`
[INFO] [stdout]  --> src/vm.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Cell, RefCell};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Cell`
[INFO] [stdout]  --> src/vm.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Cell, RefCell};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Str`, `Double`, and `Int` are never constructed
[INFO] [stdout]  --> src/vobj.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Vobj {
[INFO] [stdout]   |          ---- variants in this enum
[INFO] [stdout] 5 |     Str(String),
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 6 |     Double(f64),
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 7 |     Int(i64),
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Vobj` 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: associated functions `new_str`, `new_double`, and `new_int` are never used
[INFO] [stdout]   --> src/vobj.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Vobj {
[INFO] [stdout]    | --------- associated functions in this implementation
[INFO] [stdout] 12 |     pub fn new_str(value: &str) -> Self {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn new_double(value: f64) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn new_int(value: i64) -> Self {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Const` and `Var` are never constructed
[INFO] [stdout]  --> src/memloc.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum MemLoc {
[INFO] [stdout]   |          ------ variants in this enum
[INFO] [stdout] 4 |     Const(String),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     Var(String),
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MemLoc` 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 functions `memloc_const` and `memloc_var` are never used
[INFO] [stdout]   --> src/memloc.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl MemLoc {
[INFO] [stdout]    | ----------- associated functions in this implementation
[INFO] [stdout] 9  |     pub fn memloc_const(value:String) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn memloc_var(value:String) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `LoadVV`, `LoadCV`, `LoadWV`, and `LoadW` are never constructed
[INFO] [stdout]   --> src/instruction.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | pub enum Instruction<'a> {
[INFO] [stdout]    |          ----------- variants in this enum
[INFO] [stdout] 6  |     LoadVV {
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     LoadCV {
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     LoadWV {
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     LoadW {
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` 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 functions `loadVV_instruction`, `loadCV_instruction`, `loadWV_instruction`, and `loadW_instruction` are never used
[INFO] [stdout]   --> src/instruction.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl<'a> Instruction<'a> {
[INFO] [stdout]    | ------------------------ associated functions in this implementation
[INFO] [stdout] 34 |
[INFO] [stdout] 35 |     pub fn loadVV_instruction(operand1: MemLoc, operand2: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn loadCV_instruction(operand1: MemLoc, operand2: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub fn loadWV_instruction(operand1: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn loadW_instruction(operand1: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/err.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'a> Source<'a>{
[INFO] [stdout]   | ------------------- associated function in this implementation
[INFO] [stdout] 9 |    pub fn new(source_file:&'a str,line_number:u32)->Self{
[INFO] [stdout]   |           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Vm` is never constructed
[INFO] [stdout]   --> src/vm.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Vm<'a> {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `load`, `run`, `execute_load_w`, `execute_load_wv`, and `search_ident` are never used
[INFO] [stdout]   --> src/vm.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<'a> Vm<'a> {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 18 |     pub fn load(consts: HashMap<&'a str, Rc<Vobj>>, code: Vec<Instruction<'a>>) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn run(&'a self) -> Result<(), String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn execute_load_w(&self, operand1: &MemLoc) -> Result<(), String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn execute_load_wv(&self, operand1: &'a MemLoc) -> Result<(), String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     fn search_ident(&self, mem_loc: &MemLoc) -> Result<Rc<Vobj>, String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `loadVV_instruction` should have a snake case name
[INFO] [stdout]   --> src/instruction.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn loadVV_instruction(operand1: MemLoc, operand2: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `load_vv_instruction`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `loadCV_instruction` should have a snake case name
[INFO] [stdout]   --> src/instruction.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn loadCV_instruction(operand1: MemLoc, operand2: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `load_cv_instruction`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `loadWV_instruction` should have a snake case name
[INFO] [stdout]   --> src/instruction.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn loadWV_instruction(operand1: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `load_wv_instruction`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `loadW_instruction` should have a snake case name
[INFO] [stdout]   --> src/instruction.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn loadW_instruction(operand1: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `load_w_instruction`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `LoadVV` and `LoadCV` are never constructed
[INFO] [stdout]   --> src/instruction.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | pub enum Instruction<'a> {
[INFO] [stdout]    |          ----------- variants in this enum
[INFO] [stdout] 6  |     LoadVV {
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     LoadCV {
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` 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: associated functions `loadVV_instruction` and `loadCV_instruction` are never used
[INFO] [stdout]   --> src/instruction.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl<'a> Instruction<'a> {
[INFO] [stdout]    | ------------------------ associated functions in this implementation
[INFO] [stdout] 34 |
[INFO] [stdout] 35 |     pub fn loadVV_instruction(operand1: MemLoc, operand2: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn loadCV_instruction(operand1: MemLoc, operand2: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `loadVV_instruction` should have a snake case name
[INFO] [stdout]   --> src/instruction.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn loadVV_instruction(operand1: MemLoc, operand2: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `load_vv_instruction`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `loadCV_instruction` should have a snake case name
[INFO] [stdout]   --> src/instruction.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn loadCV_instruction(operand1: MemLoc, operand2: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `load_cv_instruction`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `loadWV_instruction` should have a snake case name
[INFO] [stdout]   --> src/instruction.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn loadWV_instruction(operand1: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `load_wv_instruction`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `loadW_instruction` should have a snake case name
[INFO] [stdout]   --> src/instruction.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn loadW_instruction(operand1: MemLoc, src: Source<'a>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `load_w_instruction`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |         vm.run();
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let _ = vm.run();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm.rs:122:9
[INFO] [stdout]     |
[INFO] [stdout] 122 |         vm.run();
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 122 |         let _ = vm.run();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "96bc8dad6bf5d9149527540d810c59f3f92a8d8a3054bb376c06cc77ebf2c85b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96bc8dad6bf5d9149527540d810c59f3f92a8d8a3054bb376c06cc77ebf2c85b", kill_on_drop: false }`
[INFO] [stdout] 96bc8dad6bf5d9149527540d810c59f3f92a8d8a3054bb376c06cc77ebf2c85b