[INFO] cloning repository https://github.com/Adeyemi-theRustyDev/the_book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Adeyemi-theRustyDev/the_book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdeyemi-theRustyDev%2Fthe_book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdeyemi-theRustyDev%2Fthe_book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8fe7a7bfdbc40a0036312c374c15cebbd0a0bc3d
[INFO] testing Adeyemi-theRustyDev/the_book against 1.75.0 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdeyemi-theRustyDev%2Fthe_book" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Adeyemi-theRustyDev/the_book on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Adeyemi-theRustyDev/the_book
[INFO] finished tweaking git repo https://github.com/Adeyemi-theRustyDev/the_book
[INFO] tweaked toml for git repo https://github.com/Adeyemi-theRustyDev/the_book written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Adeyemi-theRustyDev/the_book 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 064f4941d25efd8063cd7cef5b7ff358fb88473e90cddb38fcf2469176dc8205
[INFO] running `Command { std: "docker" "start" "-a" "064f4941d25efd8063cd7cef5b7ff358fb88473e90cddb38fcf2469176dc8205", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "064f4941d25efd8063cd7cef5b7ff358fb88473e90cddb38fcf2469176dc8205", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "064f4941d25efd8063cd7cef5b7ff358fb88473e90cddb38fcf2469176dc8205", kill_on_drop: false }`
[INFO] [stdout] 064f4941d25efd8063cd7cef5b7ff358fb88473e90cddb38fcf2469176dc8205
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88a233327b269145390ade9a77a632063407f0e34156fe4f7c41f0d808416c69
[INFO] running `Command { std: "docker" "start" "-a" "88a233327b269145390ade9a77a632063407f0e34156fe4f7c41f0d808416c69", kill_on_drop: false }`
[INFO] [stderr]    Compiling the_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `read_to_string` found for struct `File` in the current scope
[INFO] [stdout]   --> src/err_propagation.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     match f.read_to_string(&mut s) {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ method not found in `File`
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/io/mod.rs:814:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `File` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]    |
[INFO] [stdout] 1  + use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read_to_string` found for struct `File` in the current scope
[INFO] [stdout]   --> src/err_propagation.rs:21:35
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut f = File::open(path)?.read_to_string(&mut s)?;
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^ method not found in `File`
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/io/mod.rs:814:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `File` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]    |
[INFO] [stdout] 1  + use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `the_book` (bin "the_book") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "88a233327b269145390ade9a77a632063407f0e34156fe4f7c41f0d808416c69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88a233327b269145390ade9a77a632063407f0e34156fe4f7c41f0d808416c69", kill_on_drop: false }`
[INFO] [stdout] 88a233327b269145390ade9a77a632063407f0e34156fe4f7c41f0d808416c69
