[INFO] fetching crate basehangul 0.1.10...
[INFO] checking basehangul-0.1.10 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate basehangul 0.1.10 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate basehangul 0.1.10 on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate basehangul 0.1.10
[INFO] finished tweaking crates.io crate basehangul 0.1.10
[INFO] tweaked toml for crates.io crate basehangul 0.1.10 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67326a4b8e9f09dcf3407422c8280548b66fb12bcda3ab7cf4288a13bf0cce64
[INFO] running `Command { std: "docker" "start" "-a" "67326a4b8e9f09dcf3407422c8280548b66fb12bcda3ab7cf4288a13bf0cce64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67326a4b8e9f09dcf3407422c8280548b66fb12bcda3ab7cf4288a13bf0cce64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67326a4b8e9f09dcf3407422c8280548b66fb12bcda3ab7cf4288a13bf0cce64", kill_on_drop: false }`
[INFO] [stdout] 67326a4b8e9f09dcf3407422c8280548b66fb12bcda3ab7cf4288a13bf0cce64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51de29f17806c8a31b40ab16a0bb2921e1e901c7f0496ebb14db46926258db0a
[INFO] running `Command { std: "docker" "start" "-a" "51de29f17806c8a31b40ab16a0bb2921e1e901c7f0496ebb14db46926258db0a", kill_on_drop: false }`
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]     Checking encoding-index-korean v1.20141219.5
[INFO] [stderr]     Checking basehangul v0.1.10 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::borrow::IntoCow`
[INFO] [stdout]   --> src/lib.rs:14:24
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::borrow::{Cow, IntoCow};
[INFO] [stdout]    |                        ^^^^^^^ no `IntoCow` in `borrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::borrow::IntoCow`
[INFO] [stdout]   --> src/lib.rs:14:24
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::borrow::{Cow, IntoCow};
[INFO] [stdout]    |                        ^^^^^^^ no `IntoCow` in `borrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `into_cow`
[INFO] [stdout]  --> src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(into_cow)] // lib stability features as per RFC #507
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `into_cow`
[INFO] [stdout]  --> src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(into_cow)] // lib stability features as per RFC #507
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `into_cow` found for reference `&'static str` in the current scope
[INFO] [stdout]    --> src/lib.rs:243:68
[INFO] [stdout]     |
[INFO] [stdout] 243 |                     return Some(Err("non-integral number of bytes".into_cow()));
[INFO] [stdout]     |                                                                    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `into` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 243 |                     return Some(Err("non-integral number of bytes".into()));
[INFO] [stdout]     |                                                                    ~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `into_cow` found for reference `&'static str` in the current scope
[INFO] [stdout]    --> src/lib.rs:271:57
[INFO] [stdout]     |
[INFO] [stdout] 271 |                     return Some(Err("invalid code word".into_cow()));
[INFO] [stdout]     |                                                         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `into` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 271 |                     return Some(Err("invalid code word".into()));
[INFO] [stdout]     |                                                         ~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `into_cow` found for reference `&'static str` in the current scope
[INFO] [stdout]    --> src/lib.rs:243:68
[INFO] [stdout]     |
[INFO] [stdout] 243 |                     return Some(Err("non-integral number of bytes".into_cow()));
[INFO] [stdout]     |                                                                    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `into` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 243 |                     return Some(Err("non-integral number of bytes".into()));
[INFO] [stdout]     |                                                                    ~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `into_cow` found for reference `&'static str` in the current scope
[INFO] [stdout]    --> src/lib.rs:271:57
[INFO] [stdout]     |
[INFO] [stdout] 271 |                     return Some(Err("invalid code word".into_cow()));
[INFO] [stdout]     |                                                         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `into` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 271 |                     return Some(Err("invalid code word".into()));
[INFO] [stdout]     |                                                         ~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `basehangul` (lib) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `basehangul` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "51de29f17806c8a31b40ab16a0bb2921e1e901c7f0496ebb14db46926258db0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51de29f17806c8a31b40ab16a0bb2921e1e901c7f0496ebb14db46926258db0a", kill_on_drop: false }`
[INFO] [stdout] 51de29f17806c8a31b40ab16a0bb2921e1e901c7f0496ebb14db46926258db0a