[INFO] cloning repository https://github.com/iafisher/popquiz [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iafisher/popquiz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiafisher%2Fpopquiz", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiafisher%2Fpopquiz'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 59157bd1703b121e8e12eda068f2de3ab27da730 [INFO] checking iafisher/popquiz against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiafisher%2Fpopquiz" "/workspace/builds/worker-2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/iafisher/popquiz on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/iafisher/popquiz [INFO] finished tweaking git repo https://github.com/iafisher/popquiz [INFO] tweaked toml for git repo https://github.com/iafisher/popquiz written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/iafisher/popquiz already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded rustyline v4.1.0 [INFO] [stderr] Downloaded rgb v0.8.13 [INFO] [stderr] Downloaded nix v0.13.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] aa734178d901bb4768de2175a3d397c24c4fb040aa334192677af905715d1de9 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "aa734178d901bb4768de2175a3d397c24c4fb040aa334192677af905715d1de9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "aa734178d901bb4768de2175a3d397c24c4fb040aa334192677af905715d1de9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "aa734178d901bb4768de2175a3d397c24c4fb040aa334192677af905715d1de9", kill_on_drop: false }` [INFO] [stdout] aa734178d901bb4768de2175a3d397c24c4fb040aa334192677af905715d1de9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] aef3526d1d7959be237fc9b34fb861610fb96e3c003cf3f9beaaf31858ce07a1 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "aef3526d1d7959be237fc9b34fb861610fb96e3c003cf3f9beaaf31858ce07a1", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling syn v0.15.35 [INFO] [stderr] Compiling bitflags v1.1.0 [INFO] [stderr] Compiling winapi v0.3.7 [INFO] [stderr] Checking lazy_static v1.3.0 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling nix v0.13.1 [INFO] [stderr] Checking approx v0.1.1 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Checking unicode-width v0.1.5 [INFO] [stderr] Checking rgb v0.8.13 [INFO] [stderr] Checking smallvec v0.6.10 [INFO] [stderr] Compiling regex v1.1.9 [INFO] [stderr] Checking unicode-segmentation v1.3.0 [INFO] [stderr] Checking regex-syntax v0.6.12 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking dirs v1.0.5 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking term_size v0.3.1 [INFO] [stderr] Checking aho-corasick v0.7.6 [INFO] [stderr] Checking num-traits v0.1.43 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Checking unicode-normalization v0.1.8 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking rand v0.6.5 [INFO] [stderr] Checking nix v0.15.0 [INFO] [stderr] Checking cgmath v0.16.1 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Checking winconsole v0.10.0 [INFO] [stderr] Checking colored v1.8.0 [INFO] [stderr] Checking rustyline v4.1.0 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stderr] Checking serde v1.0.101 [INFO] [stderr] Checking serde_json v1.0.39 [INFO] [stderr] Checking chrono v0.4.6 [INFO] [stderr] Checking drill v1.0.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/common.rs:78:32 [INFO] [stdout] | [INFO] [stdout] 78 | fn cause(&self) -> Option<&error::Error> { [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/persistence.rs:147:17 [INFO] [stdout] | [INFO] [stdout] 147 | ) -> Result> { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:36:28 [INFO] [stdout] | [INFO] [stdout] 36 | questions: &'a Vec>, [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:38:18 [INFO] [stdout] | [INFO] [stdout] 38 | ) -> Vec<&'a Box> { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:111:36 [INFO] [stdout] | [INFO] [stdout] 111 | fn cmp_questions_in_order(a: &&Box, b: &&Box) -> cmp::Ordering { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:111:56 [INFO] [stdout] | [INFO] [stdout] 111 | fn cmp_questions_in_order(a: &&Box, b: &&Box) -> cmp::Ordering { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:128:41 [INFO] [stdout] | [INFO] [stdout] 128 | fn cmp_questions_oldest_first(a: &&&Box, b: &&&Box) -> cmp::Ordering { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:128:62 [INFO] [stdout] | [INFO] [stdout] 128 | fn cmp_questions_oldest_first(a: &&&Box, b: &&&Box) -> cmp::Ordering { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/common.rs:78:32 [INFO] [stdout] | [INFO] [stdout] 78 | fn cause(&self) -> Option<&error::Error> { [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/persistence.rs:147:17 [INFO] [stdout] | [INFO] [stdout] 147 | ) -> Result> { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:36:28 [INFO] [stdout] | [INFO] [stdout] 36 | questions: &'a Vec>, [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:38:18 [INFO] [stdout] | [INFO] [stdout] 38 | ) -> Vec<&'a Box> { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:111:36 [INFO] [stdout] | [INFO] [stdout] 111 | fn cmp_questions_in_order(a: &&Box, b: &&Box) -> cmp::Ordering { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:111:56 [INFO] [stdout] | [INFO] [stdout] 111 | fn cmp_questions_in_order(a: &&Box, b: &&Box) -> cmp::Ordering { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:128:41 [INFO] [stdout] | [INFO] [stdout] 128 | fn cmp_questions_oldest_first(a: &&&Box, b: &&&Box) -> cmp::Ordering { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/repetition.rs:128:62 [INFO] [stdout] | [INFO] [stdout] 128 | fn cmp_questions_oldest_first(a: &&&Box, b: &&&Box) -> cmp::Ordering { [INFO] [stdout] | ^^^^^^^^ help: use `dyn`: `dyn Question` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: cannot borrow `tags` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/main.rs:476:17 [INFO] [stdout] | [INFO] [stdout] 475 | if let Some(n) = tags.get(tag.as_str()) { [INFO] [stdout] | ---- immutable borrow occurs here [INFO] [stdout] 476 | tags.insert(tag.as_str(), n + 1); [INFO] [stdout] | ^^^^ - immutable borrow later used here [INFO] [stdout] | | [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default [INFO] [stdout] = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future [INFO] [stdout] = note: for more information, see issue #59159 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: cannot borrow `tags` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/main.rs:476:17 [INFO] [stdout] | [INFO] [stdout] 475 | if let Some(n) = tags.get(tag.as_str()) { [INFO] [stdout] | ---- immutable borrow occurs here [INFO] [stdout] 476 | tags.insert(tag.as_str(), n + 1); [INFO] [stdout] | ^^^^ - immutable borrow later used here [INFO] [stdout] | | [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default [INFO] [stdout] = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future [INFO] [stdout] = note: for more information, see issue #59159 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 15s [INFO] running `Command { std: "docker" "inspect" "aef3526d1d7959be237fc9b34fb861610fb96e3c003cf3f9beaaf31858ce07a1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "aef3526d1d7959be237fc9b34fb861610fb96e3c003cf3f9beaaf31858ce07a1", kill_on_drop: false }` [INFO] [stdout] aef3526d1d7959be237fc9b34fb861610fb96e3c003cf3f9beaaf31858ce07a1