[INFO] cloning repository https://github.com/thomas40510/randomRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thomas40510/randomRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas40510%2FrandomRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas40510%2FrandomRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3f76e9b2108b369990b8cafc40bcf378a1814eb
[INFO] checking thomas40510/randomRust against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas40510%2FrandomRust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomas40510/randomRust on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thomas40510/randomRust
[INFO] finished tweaking git repo https://github.com/thomas40510/randomRust
[INFO] tweaked toml for git repo https://github.com/thomas40510/randomRust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/thomas40510/randomRust 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c1961ba123c15e78f29c1c5660e3d57a12cd130ef78bb7a42d3f12a7adb2839
[INFO] running `Command { std: "docker" "start" "-a" "8c1961ba123c15e78f29c1c5660e3d57a12cd130ef78bb7a42d3f12a7adb2839", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c1961ba123c15e78f29c1c5660e3d57a12cd130ef78bb7a42d3f12a7adb2839", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c1961ba123c15e78f29c1c5660e3d57a12cd130ef78bb7a42d3f12a7adb2839", kill_on_drop: false }`
[INFO] [stdout] 8c1961ba123c15e78f29c1c5660e3d57a12cd130ef78bb7a42d3f12a7adb2839
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89b9e816f022da808b0417dffc3093e6f1eccc9a83bbd8ece2319af4af517115
[INFO] running `Command { std: "docker" "start" "-a" "89b9e816f022da808b0417dffc3093e6f1eccc9a83bbd8ece2319af4af517115", kill_on_drop: false }`
[INFO] [stderr]     Checking untitled v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: static `LASTMSG` is never used
[INFO] [stdout]  --> src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | static mut LASTMSG: Vec<Vec<u64>> = Vec::new();
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `LASTMSG` is never used
[INFO] [stdout]  --> src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | static mut LASTMSG: Vec<Vec<u64>> = Vec::new();
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_on_thread` is never used
[INFO] [stdout]    --> src/main.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn display_on_thread(message: &Vec<u64>) -> (){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Vigenere` is never constructed
[INFO] [stdout]  --> src/vigenere.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Vigenere {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_on_thread` is never used
[INFO] [stdout]    --> src/main.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn display_on_thread(message: &Vec<u64>) -> (){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `encrypt`, and `decrypt` are never used
[INFO] [stdout]   --> src/vigenere.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl Vigenere {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 6  |     pub fn new(key: &str) -> Vigenere {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn encrypt(&self, plaintext: &str) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn decrypt(&self, ciphertext: &str) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Vigenere` is never constructed
[INFO] [stdout]  --> src/vigenere.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Vigenere {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Caesar` is never constructed
[INFO] [stdout]  --> src/caesar.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Caesar {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `encrypt`, and `decrypt` are never used
[INFO] [stdout]   --> src/caesar.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl Caesar {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 6  |     pub fn new(shift: u8) -> Caesar {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub fn encrypt(&self, plaintext: &str) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn decrypt(&self, ciphertext: &str) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `encrypt`, and `decrypt` are never used
[INFO] [stdout]   --> src/vigenere.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl Vigenere {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 6  |     pub fn new(key: &str) -> Vigenere {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn encrypt(&self, plaintext: &str) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn decrypt(&self, ciphertext: &str) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Caesar` is never constructed
[INFO] [stdout]  --> src/caesar.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Caesar {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_public_key` and `get_private_key` are never used
[INFO] [stdout]   --> src/rsa.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl RSA {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn get_public_key(&self) -> (u64, u64) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn get_private_key(&self) -> (u64, u64) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `encrypt`, and `decrypt` are never used
[INFO] [stdout]   --> src/caesar.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl Caesar {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 6  |     pub fn new(shift: u8) -> Caesar {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub fn encrypt(&self, plaintext: &str) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn decrypt(&self, ciphertext: &str) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_public_key` and `get_private_key` are never used
[INFO] [stdout]   --> src/rsa.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl RSA {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn get_public_key(&self) -> (u64, u64) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn get_private_key(&self) -> (u64, u64) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "89b9e816f022da808b0417dffc3093e6f1eccc9a83bbd8ece2319af4af517115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89b9e816f022da808b0417dffc3093e6f1eccc9a83bbd8ece2319af4af517115", kill_on_drop: false }`
[INFO] [stdout] 89b9e816f022da808b0417dffc3093e6f1eccc9a83bbd8ece2319af4af517115
[INFO] checking thomas40510/randomRust against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas40510%2FrandomRust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomas40510/randomRust on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thomas40510/randomRust
[INFO] finished tweaking git repo https://github.com/thomas40510/randomRust
[INFO] tweaked toml for git repo https://github.com/thomas40510/randomRust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/thomas40510/randomRust 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a055ef42c9c8a92068b0f9d2d37e833b81540347fc28bb00f9c2e02e014a2bd
[INFO] running `Command { std: "docker" "start" "-a" "3a055ef42c9c8a92068b0f9d2d37e833b81540347fc28bb00f9c2e02e014a2bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a055ef42c9c8a92068b0f9d2d37e833b81540347fc28bb00f9c2e02e014a2bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a055ef42c9c8a92068b0f9d2d37e833b81540347fc28bb00f9c2e02e014a2bd", kill_on_drop: false }`
[INFO] [stdout] 3a055ef42c9c8a92068b0f9d2d37e833b81540347fc28bb00f9c2e02e014a2bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88f7de21754065416293b5ed745085297bce8ebae7e26c186b81364a10d1dfa7
[INFO] running `Command { std: "docker" "start" "-a" "88f7de21754065416293b5ed745085297bce8ebae7e26c186b81364a10d1dfa7", kill_on_drop: false }`
[INFO] [stderr]     Checking untitled v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/main.rs:100:28
[INFO] [stdout]     |
[INFO] [stdout] 100 |         std::thread::spawn(|| {
[INFO] [stdout]     |                            ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `spawn`
[INFO] [stdout]    --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]     |
[INFO] [stdout] 100 |         std::thread::spawn(|| -> /* Type */ {
[INFO] [stdout]     |                               +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/main.rs:100:28
[INFO] [stdout]     |
[INFO] [stdout] 100 |         std::thread::spawn(|| {
[INFO] [stdout]     |                            ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `spawn`
[INFO] [stdout]    --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]     |
[INFO] [stdout] 100 |         std::thread::spawn(|| -> /* Type */ {
[INFO] [stdout]     |                               +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `untitled` (bin "untitled" test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `untitled` (bin "untitled") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "88f7de21754065416293b5ed745085297bce8ebae7e26c186b81364a10d1dfa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88f7de21754065416293b5ed745085297bce8ebae7e26c186b81364a10d1dfa7", kill_on_drop: false }`
[INFO] [stdout] 88f7de21754065416293b5ed745085297bce8ebae7e26c186b81364a10d1dfa7