[INFO] cloning repository https://github.com/SpencerN319/rust_book [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SpencerN319/rust_book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpencerN319%2Frust_book", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpencerN319%2Frust_book'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] be2430bf15ffea5439b933e5cffc8695a78c941c [INFO] checking SpencerN319/rust_book against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpencerN319%2Frust_book" "/workspace/builds/worker-82/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-82/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/SpencerN319/rust_book on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/SpencerN319/rust_book [INFO] finished tweaking git repo https://github.com/SpencerN319/rust_book [INFO] tweaked toml for git repo https://github.com/SpencerN319/rust_book written to /workspace/builds/worker-82/source/Cargo.toml [INFO] crate git repo https://github.com/SpencerN319/rust_book already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 9c1eca51e971e0b873588894770590838493a9c2a3e1ba2c548b123b6fc6c545 [INFO] running `Command { std: "docker" "start" "-a" "9c1eca51e971e0b873588894770590838493a9c2a3e1ba2c548b123b6fc6c545", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "9c1eca51e971e0b873588894770590838493a9c2a3e1ba2c548b123b6fc6c545", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9c1eca51e971e0b873588894770590838493a9c2a3e1ba2c548b123b6fc6c545", kill_on_drop: false }` [INFO] [stdout] 9c1eca51e971e0b873588894770590838493a9c2a3e1ba2c548b123b6fc6c545 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 598eb144e23a7c698e7cdbcf8360a6fa77c4c8d65afbff761bd9f4d62eb8b84b [INFO] running `Command { std: "docker" "start" "-a" "598eb144e23a7c698e7cdbcf8360a6fa77c4c8d65afbff761bd9f4d62eb8b84b", kill_on_drop: false }` [INFO] [stderr] Copying to /tmp/fixit [INFO] [stderr] Running `cargo fix --edition` [INFO] [stderr] Compiling libc v0.2.97 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Checking ppv-lite86 v0.2.10 [INFO] [stderr] Checking getrandom v0.2.3 [INFO] [stderr] Checking rand_core v0.6.3 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand v0.8.4 [INFO] [stderr] Checking rust_book v0.1.0 (/tmp/fixit) [INFO] [stderr] Migrating src/lib.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/main.rs from 2018 edition to 2021 [INFO] [stdout] error[E0277]: the trait bound `String: From<()>` is not satisfied [INFO] [stdout] --> src/functions.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | String::from(s1.push_str(s2)) [INFO] [stdout] | ^^^^^^^^^^^^ the trait `From<()>` is not implemented for `String` [INFO] [stdout] | [INFO] [stdout] = help: the following implementations were found: [INFO] [stdout] > [INFO] [stdout] > [INFO] [stdout] > [INFO] [stdout] >> [INFO] [stdout] and 2 others [INFO] [stdout] note: required by `from` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] [INFO] [stderr] error: could not compile `rust_book` due to 2 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error[E0277]: the trait bound `String: From<()>` is not satisfied [INFO] [stdout] --> src/functions.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | String::from(s1.push_str(s2)) [INFO] [stdout] | ^^^^^^^^^^^^ the trait `From<()>` is not implemented for `String` [INFO] [stdout] | [INFO] [stdout] = help: the following implementations were found: [INFO] [stdout] > [INFO] [stdout] > [INFO] [stdout] > [INFO] [stdout] >> [INFO] [stdout] and 2 others [INFO] [stdout] note: required by `from` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] [stderr] error: failed to migrate to next edition [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101) [INFO] running `Command { std: "docker" "inspect" "598eb144e23a7c698e7cdbcf8360a6fa77c4c8d65afbff761bd9f4d62eb8b84b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "598eb144e23a7c698e7cdbcf8360a6fa77c4c8d65afbff761bd9f4d62eb8b84b", kill_on_drop: false }` [INFO] [stdout] 598eb144e23a7c698e7cdbcf8360a6fa77c4c8d65afbff761bd9f4d62eb8b84b