[INFO] cloning repository https://github.com/abdokin/dc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/abdokin/dc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabdokin%2Fdc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabdokin%2Fdc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f12e1a9ba72323a59a6ebdd8f8a77fb62f9bcfb
[INFO] checking abdokin/dc against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabdokin%2Fdc" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/abdokin/dc 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/abdokin/dc
[INFO] finished tweaking git repo https://github.com/abdokin/dc
[INFO] tweaked toml for git repo https://github.com/abdokin/dc written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/abdokin/dc 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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a296634d179e02f8a29b6b2dc1feddc7d81b8e03207cfce1803b347b4cd67ff5
[INFO] running `Command { std: "docker" "start" "-a" "a296634d179e02f8a29b6b2dc1feddc7d81b8e03207cfce1803b347b4cd67ff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a296634d179e02f8a29b6b2dc1feddc7d81b8e03207cfce1803b347b4cd67ff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a296634d179e02f8a29b6b2dc1feddc7d81b8e03207cfce1803b347b4cd67ff5", kill_on_drop: false }`
[INFO] [stdout] a296634d179e02f8a29b6b2dc1feddc7d81b8e03207cfce1803b347b4cd67ff5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] cb351b78d25e753a952f286761849a6213658e0098104674e45f9394bf812a7f
[INFO] running `Command { std: "docker" "start" "-a" "cb351b78d25e753a952f286761849a6213658e0098104674e45f9394bf812a7f", kill_on_drop: false }`
[INFO] [stderr]     Checking dc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/lexer.rs:137:38
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn lax_string_literal(&mut self, c: char) -> Token {
[INFO] [stdout]     |                                      ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/lexer.rs:137:38
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn lax_string_literal(&mut self, c: char) -> Token {
[INFO] [stdout]     |                                      ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> src/parser.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Parser<'a> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/parser.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'a> Parser<'a> {
[INFO] [stdout]   | ------------------- associated function in this implementation
[INFO] [stdout] 9 |     pub fn new(lexer: &mut Lexer<'a>) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> src/parser.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Parser<'a> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `save_file` is never used
[INFO] [stdout]   --> src/utils.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |  pub fn save_file(file_path: &str, content: String) -> Result<(), std::io::Error> {
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/parser.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'a> Parser<'a> {
[INFO] [stdout]   | ------------------- associated function in this implementation
[INFO] [stdout] 9 |     pub fn new(lexer: &mut Lexer<'a>) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `save_file` is never used
[INFO] [stdout]   --> src/utils.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |  pub fn save_file(file_path: &str, content: String) -> Result<(), std::io::Error> {
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "cb351b78d25e753a952f286761849a6213658e0098104674e45f9394bf812a7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb351b78d25e753a952f286761849a6213658e0098104674e45f9394bf812a7f", kill_on_drop: false }`
[INFO] [stdout] cb351b78d25e753a952f286761849a6213658e0098104674e45f9394bf812a7f
[INFO] checking abdokin/dc against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabdokin%2Fdc" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/abdokin/dc 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/abdokin/dc
[INFO] finished tweaking git repo https://github.com/abdokin/dc
[INFO] tweaked toml for git repo https://github.com/abdokin/dc written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/abdokin/dc 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] dbf0cac137710ca99843e107a3ca464a85b3c65efc59995e20ec405d29794d78
[INFO] running `Command { std: "docker" "start" "-a" "dbf0cac137710ca99843e107a3ca464a85b3c65efc59995e20ec405d29794d78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbf0cac137710ca99843e107a3ca464a85b3c65efc59995e20ec405d29794d78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbf0cac137710ca99843e107a3ca464a85b3c65efc59995e20ec405d29794d78", kill_on_drop: false }`
[INFO] [stdout] dbf0cac137710ca99843e107a3ca464a85b3c65efc59995e20ec405d29794d78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 82b6febbb083712f23dfeb3f2646d6cfaa7ce4821ed97b79c16227df2d1aa9e7
[INFO] running `Command { std: "docker" "start" "-a" "82b6febbb083712f23dfeb3f2646d6cfaa7ce4821ed97b79c16227df2d1aa9e7", kill_on_drop: false }`
[INFO] [stderr]     Checking dc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/utils.rs:16:18
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .map_err(|e| {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .map_err(|e| -> /* Type */ {
[INFO] [stdout]    |                      +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/utils.rs:16:18
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .map_err(|e| {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .map_err(|e| -> /* Type */ {
[INFO] [stdout]    |                      +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/lexer.rs:137:38
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn lax_string_literal(&mut self, c: char) -> Token {
[INFO] [stdout]     |                                      ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/lexer.rs:137:38
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn lax_string_literal(&mut self, c: char) -> Token {
[INFO] [stdout]     |                                      ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dc` (bin "dc") due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `dc` (bin "dc" test) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "82b6febbb083712f23dfeb3f2646d6cfaa7ce4821ed97b79c16227df2d1aa9e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82b6febbb083712f23dfeb3f2646d6cfaa7ce4821ed97b79c16227df2d1aa9e7", kill_on_drop: false }`
[INFO] [stdout] 82b6febbb083712f23dfeb3f2646d6cfaa7ce4821ed97b79c16227df2d1aa9e7