[INFO] cloning repository https://github.com/lux01/synacor [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lux01/synacor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flux01%2Fsynacor", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flux01%2Fsynacor'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 67227429ec8c84bd427b89888080582c8cbfdae2 [INFO] checking lux01/synacor against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flux01%2Fsynacor" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/lux01/synacor on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/lux01/synacor [INFO] finished tweaking git repo https://github.com/lux01/synacor [INFO] tweaked toml for git repo https://github.com/lux01/synacor written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/lux01/synacor 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded dtoa v0.4.1 [INFO] [stderr] Downloaded itoa v0.3.1 [INFO] [stderr] Downloaded num-traits v0.1.36 [INFO] [stderr] Downloaded bit-set v0.4.0 [INFO] [stderr] Downloaded quote v0.3.12 [INFO] [stderr] Downloaded libc v0.2.19 [INFO] [stderr] Downloaded termion v1.1.4 [INFO] [stderr] Downloaded serde_json v0.9.5 [INFO] [stderr] Downloaded chan-signal v0.2.0 [INFO] [stderr] Downloaded serde_codegen_internals v0.13.0 [INFO] [stderr] Downloaded syn v0.11.4 [INFO] [stderr] Downloaded chan v0.1.18 [INFO] [stderr] Downloaded serde_derive v0.9.6 [INFO] [stderr] Downloaded bit-vec v0.4.3 [INFO] [stderr] Downloaded serde v0.9.6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 28b83544bedc2ce5ae8106540d62701f49c41e274b4c990bdc2b6b616b3c3ee2 [INFO] running `Command { std: "docker" "start" "-a" "28b83544bedc2ce5ae8106540d62701f49c41e274b4c990bdc2b6b616b3c3ee2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "28b83544bedc2ce5ae8106540d62701f49c41e274b4c990bdc2b6b616b3c3ee2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "28b83544bedc2ce5ae8106540d62701f49c41e274b4c990bdc2b6b616b3c3ee2", kill_on_drop: false }` [INFO] [stdout] 28b83544bedc2ce5ae8106540d62701f49c41e274b4c990bdc2b6b616b3c3ee2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7a5a5854fe2263b4a3668d5174d43f722a5bcc4e2291ee8169c374ef94e170d3 [INFO] running `Command { std: "docker" "start" "-a" "7a5a5854fe2263b4a3668d5174d43f722a5bcc4e2291ee8169c374ef94e170d3", kill_on_drop: false }` [INFO] [stderr] Checking libc v0.2.19 [INFO] [stderr] Compiling unicode-xid v0.0.4 [INFO] [stderr] Compiling quote v0.3.12 [INFO] [stderr] Checking bit-vec v0.4.3 [INFO] [stderr] Checking lazy_static v0.2.2 [INFO] [stderr] Checking serde v0.9.6 [INFO] [stderr] Checking dtoa v0.4.1 [INFO] [stderr] Checking itoa v0.3.1 [INFO] [stderr] Checking num-traits v0.1.36 [INFO] [stderr] Checking byteorder v1.0.0 [INFO] [stderr] Checking bit-set v0.4.0 [INFO] [stderr] Compiling syn v0.11.4 [INFO] [stderr] Checking rand v0.3.15 [INFO] [stderr] Checking termion v1.1.4 [INFO] [stderr] Checking chan v0.1.18 [INFO] [stderr] Checking chan-signal v0.2.0 [INFO] [stderr] Compiling serde_codegen_internals v0.13.0 [INFO] [stderr] Compiling serde_derive v0.9.6 [INFO] [stderr] Checking serde_json v0.9.5 [INFO] [stderr] Checking synacor v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `serde_json` is imported redundantly [INFO] [stdout] --> src/cpu/injection.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use serde_json; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] ::: src/lib.rs:7:1 [INFO] [stdout] | [INFO] [stdout] 7 | extern crate serde_json; [INFO] [stdout] | ------------------------ the item `serde_json` is already imported here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Default` is imported redundantly [INFO] [stdout] --> src/cpu/status.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::default::Default; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Default` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `chan` is imported redundantly [INFO] [stdout] --> src/cpu/mod.rs:16:5 [INFO] [stdout] | [INFO] [stdout] 16 | use chan; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] ::: src/lib.rs:11:14 [INFO] [stdout] | [INFO] [stdout] 11 | #[macro_use] extern crate chan; [INFO] [stdout] | ------------------ the item `chan` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `chan_signal` is imported redundantly [INFO] [stdout] --> src/cpu/mod.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 17 | use chan_signal; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] ::: src/lib.rs:12:1 [INFO] [stdout] | [INFO] [stdout] 12 | extern crate chan_signal; [INFO] [stdout] | ------------------------- the item `chan_signal` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `serde_json` is imported redundantly [INFO] [stdout] --> src/cpu/injection.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use serde_json; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] ::: src/lib.rs:7:1 [INFO] [stdout] | [INFO] [stdout] 7 | extern crate serde_json; [INFO] [stdout] | ------------------------ the item `serde_json` is already imported here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Default` is imported redundantly [INFO] [stdout] --> src/cpu/status.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::default::Default; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Default` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `chan` is imported redundantly [INFO] [stdout] --> src/cpu/mod.rs:16:5 [INFO] [stdout] | [INFO] [stdout] 16 | use chan; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] ::: src/lib.rs:11:14 [INFO] [stdout] | [INFO] [stdout] 11 | #[macro_use] extern crate chan; [INFO] [stdout] | ------------------ the item `chan` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `chan_signal` is imported redundantly [INFO] [stdout] --> src/cpu/mod.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 17 | use chan_signal; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] ::: src/lib.rs:12:1 [INFO] [stdout] | [INFO] [stdout] 12 | extern crate chan_signal; [INFO] [stdout] | ------------------------- the item `chan_signal` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/cpu/status.rs:43:32 [INFO] [stdout] | [INFO] [stdout] 43 | fn cause(&self) -> Option<&error::Error> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] help: if this is an object-safe trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 43 | fn cause(&self) -> Option<&dyn error::Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/cpu/status.rs:43:32 [INFO] [stdout] | [INFO] [stdout] 43 | fn cause(&self) -> Option<&error::Error> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] help: if this is an object-safe trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 43 | fn cause(&self) -> Option<&dyn error::Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Into` is imported redundantly [INFO] [stdout] --> src/brute_forcer/main.rs:4:20 [INFO] [stdout] | [INFO] [stdout] 4 | use std::convert::{Into, From}; [INFO] [stdout] | ^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Into` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `From` is imported redundantly [INFO] [stdout] --> src/brute_forcer/main.rs:4:26 [INFO] [stdout] | [INFO] [stdout] 4 | use std::convert::{Into, From}; [INFO] [stdout] | ^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `From` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Into` is imported redundantly [INFO] [stdout] --> src/brute_forcer/main.rs:4:20 [INFO] [stdout] | [INFO] [stdout] 4 | use std::convert::{Into, From}; [INFO] [stdout] | ^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Into` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `From` is imported redundantly [INFO] [stdout] --> src/brute_forcer/main.rs:4:26 [INFO] [stdout] | [INFO] [stdout] 4 | use std::convert::{Into, From}; [INFO] [stdout] | ^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `From` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `#[macro_use]` import [INFO] [stdout] --> src/debugger/main.rs:8:1 [INFO] [stdout] | [INFO] [stdout] 8 | #[macro_use] extern crate chan; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `From` is imported redundantly [INFO] [stdout] --> src/debugger/command.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::convert::From; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `From` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `libc` is imported redundantly [INFO] [stdout] --> src/debugger/debugger.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use libc; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] ::: src/debugger/main.rs:10:1 [INFO] [stdout] | [INFO] [stdout] 10 | extern crate libc; [INFO] [stdout] | ------------------ the item `libc` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Into` is imported redundantly [INFO] [stdout] --> src/debugger/debugger.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | use std::convert::Into; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Into` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `#[macro_use]` import [INFO] [stdout] --> src/debugger/main.rs:8:1 [INFO] [stdout] | [INFO] [stdout] 8 | #[macro_use] extern crate chan; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `From` is imported redundantly [INFO] [stdout] --> src/debugger/command.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::convert::From; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `From` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `libc` is imported redundantly [INFO] [stdout] --> src/debugger/debugger.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use libc; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] ::: src/debugger/main.rs:10:1 [INFO] [stdout] | [INFO] [stdout] 10 | extern crate libc; [INFO] [stdout] | ------------------ the item `libc` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Into` is imported redundantly [INFO] [stdout] --> src/debugger/debugger.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | use std::convert::Into; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Into` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [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 4.59s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.11.4 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2` [INFO] running `Command { std: "docker" "inspect" "7a5a5854fe2263b4a3668d5174d43f722a5bcc4e2291ee8169c374ef94e170d3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7a5a5854fe2263b4a3668d5174d43f722a5bcc4e2291ee8169c374ef94e170d3", kill_on_drop: false }` [INFO] [stdout] 7a5a5854fe2263b4a3668d5174d43f722a5bcc4e2291ee8169c374ef94e170d3