[INFO] cloning repository https://github.com/Nandem/Rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nandem/Rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] f6ba2518afb7cacb51835855bbd260bf98a628b1 [INFO] checking Nandem/Rust_learning against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Nandem/Rust_learning on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Nandem/Rust_learning [INFO] finished tweaking git repo https://github.com/Nandem/Rust_learning [INFO] tweaked toml for git repo https://github.com/Nandem/Rust_learning written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/Nandem/Rust_learning 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 16882e7b42ebf1667257a5bb497de09b2b4042d5ae42df7636c53b1c16b8f308 [INFO] running `Command { std: "docker" "start" "-a" "16882e7b42ebf1667257a5bb497de09b2b4042d5ae42df7636c53b1c16b8f308", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "16882e7b42ebf1667257a5bb497de09b2b4042d5ae42df7636c53b1c16b8f308", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "16882e7b42ebf1667257a5bb497de09b2b4042d5ae42df7636c53b1c16b8f308", kill_on_drop: false }` [INFO] [stdout] 16882e7b42ebf1667257a5bb497de09b2b4042d5ae42df7636c53b1c16b8f308 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 8c44a2eb1d62b0f00b3e0d30ddba0cfb9714d1047bee146a68e0b3d18e1c1553 [INFO] running `Command { std: "docker" "start" "-a" "8c44a2eb1d62b0f00b3e0d30ddba0cfb9714d1047bee146a68e0b3d18e1c1553", kill_on_drop: false }` [INFO] [stderr] Checking learning v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io` [INFO] [stdout] --> src/errors/error1.rs:39:49 [INFO] [stdout] | [INFO] [stdout] 39 | fn read_username_from_file1() -> Result { [INFO] [stdout] | ^^ use of undeclared crate or module `io` [INFO] [stdout] | [INFO] [stdout] help: a builtin type with a similar name exists [INFO] [stdout] | [INFO] [stdout] 39 | fn read_username_from_file1() -> Result { [INFO] [stdout] | ~~ [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 12 + use std::io; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io` [INFO] [stdout] --> src/errors/error1.rs:55:49 [INFO] [stdout] | [INFO] [stdout] 55 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^ use of undeclared crate or module `io` [INFO] [stdout] | [INFO] [stdout] help: a builtin type with a similar name exists [INFO] [stdout] | [INFO] [stdout] 55 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ~~ [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 12 + use std::io; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io` [INFO] [stdout] --> src/errors/error1.rs:39:49 [INFO] [stdout] | [INFO] [stdout] 39 | fn read_username_from_file1() -> Result { [INFO] [stdout] | ^^ use of undeclared crate or module `io` [INFO] [stdout] | [INFO] [stdout] help: a builtin type with a similar name exists [INFO] [stdout] | [INFO] [stdout] 39 | fn read_username_from_file1() -> Result { [INFO] [stdout] | ~~ [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 12 + use std::io; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io` [INFO] [stdout] --> src/errors/error1.rs:62:49 [INFO] [stdout] | [INFO] [stdout] 62 | fn read_username_from_file3() -> Result { [INFO] [stdout] | ^^ use of undeclared crate or module `io` [INFO] [stdout] | [INFO] [stdout] help: a builtin type with a similar name exists [INFO] [stdout] | [INFO] [stdout] 62 | fn read_username_from_file3() -> Result { [INFO] [stdout] | ~~ [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 12 + use std::io; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io` [INFO] [stdout] --> src/errors/error1.rs:55:49 [INFO] [stdout] | [INFO] [stdout] 55 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^ use of undeclared crate or module `io` [INFO] [stdout] | [INFO] [stdout] help: a builtin type with a similar name exists [INFO] [stdout] | [INFO] [stdout] 55 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ~~ [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 12 + use std::io; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io` [INFO] [stdout] --> src/errors/error1.rs:62:49 [INFO] [stdout] | [INFO] [stdout] 62 | fn read_username_from_file3() -> Result { [INFO] [stdout] | ^^ use of undeclared crate or module `io` [INFO] [stdout] | [INFO] [stdout] help: a builtin type with a similar name exists [INFO] [stdout] | [INFO] [stdout] 62 | fn read_username_from_file3() -> Result { [INFO] [stdout] | ~~ [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 12 + use std::io; [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/errors/error1.rs:49:13 [INFO] [stdout] | [INFO] [stdout] 49 | match f.read_to_string(&mut s) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/io/mod.rs:894:8 [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: trait `Read` which provides `read_to_string` is implemented but not in scope; perhaps you want to import it [INFO] [stdout] | [INFO] [stdout] 1 + use std::io::Read; [INFO] [stdout] | [INFO] [stdout] help: there is a method `read_to_end` with a similar name [INFO] [stdout] | [INFO] [stdout] 49 | match f.read_to_end(&mut s) { [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/errors/error1.rs:49:13 [INFO] [stdout] | [INFO] [stdout] 49 | match f.read_to_string(&mut s) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/io/mod.rs:894:8 [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: trait `Read` which provides `read_to_string` is implemented but not in scope; perhaps you want to import it [INFO] [stdout] | [INFO] [stdout] 1 + use std::io::Read; [INFO] [stdout] | [INFO] [stdout] help: there is a method `read_to_end` with a similar name [INFO] [stdout] | [INFO] [stdout] 49 | match f.read_to_end(&mut s) { [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/errors/error1.rs:58:7 [INFO] [stdout] | [INFO] [stdout] 58 | f.read_to_string(&mut s)?; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/io/mod.rs:894:8 [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: trait `Read` which provides `read_to_string` is implemented but not in scope; perhaps you want to import it [INFO] [stdout] | [INFO] [stdout] 1 + use std::io::Read; [INFO] [stdout] | [INFO] [stdout] help: there is a method `read_to_end` with a similar name [INFO] [stdout] | [INFO] [stdout] 58 | f.read_to_end(&mut s)?; [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/errors/error1.rs:58:7 [INFO] [stdout] | [INFO] [stdout] 58 | f.read_to_string(&mut s)?; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/io/mod.rs:894:8 [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: trait `Read` which provides `read_to_string` is implemented but not in scope; perhaps you want to import it [INFO] [stdout] | [INFO] [stdout] 1 + use std::io::Read; [INFO] [stdout] | [INFO] [stdout] help: there is a method `read_to_end` with a similar name [INFO] [stdout] | [INFO] [stdout] 58 | f.read_to_end(&mut s)?; [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/errors/error1.rs:65:30 [INFO] [stdout] | [INFO] [stdout] 65 | File::open("hello.txt")?.read_to_string(&mut s)?; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/io/mod.rs:894:8 [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: trait `Read` which provides `read_to_string` is implemented but not in scope; perhaps you want to import it [INFO] [stdout] | [INFO] [stdout] 1 + use std::io::Read; [INFO] [stdout] | [INFO] [stdout] help: there is a method `read_to_end` with a similar name [INFO] [stdout] | [INFO] [stdout] 65 | File::open("hello.txt")?.read_to_end(&mut s)?; [INFO] [stdout] | ~~~~~~~~~~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/errors/error1.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let f = match f [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [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/errors/error1.rs:65:30 [INFO] [stdout] | [INFO] [stdout] 65 | File::open("hello.txt")?.read_to_string(&mut s)?; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/io/mod.rs:894:8 [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: trait `Read` which provides `read_to_string` is implemented but not in scope; perhaps you want to import it [INFO] [stdout] | [INFO] [stdout] 1 + use std::io::Read; [INFO] [stdout] | [INFO] [stdout] help: there is a method `read_to_end` with a similar name [INFO] [stdout] | [INFO] [stdout] 65 | File::open("hello.txt")?.read_to_end(&mut s)?; [INFO] [stdout] | ~~~~~~~~~~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/errors/error1.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let f = match f [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 6 previous errors; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0433, E0599. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0433`. [INFO] [stdout] [INFO] [stdout] error: aborting due to 6 previous errors; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0433, E0599. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0433`. [INFO] [stdout] [INFO] [stderr] error: could not compile `learning` (lib) due to 7 previous errors; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `learning` (lib test) due to 7 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "8c44a2eb1d62b0f00b3e0d30ddba0cfb9714d1047bee146a68e0b3d18e1c1553", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8c44a2eb1d62b0f00b3e0d30ddba0cfb9714d1047bee146a68e0b3d18e1c1553", kill_on_drop: false }` [INFO] [stdout] 8c44a2eb1d62b0f00b3e0d30ddba0cfb9714d1047bee146a68e0b3d18e1c1553