[INFO] fetching crate maybe_utf8 0.2.3...
[INFO] testing maybe_utf8-0.2.3 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate maybe_utf8 0.2.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate maybe_utf8 0.2.3
[INFO] finished tweaking crates.io crate maybe_utf8 0.2.3
[INFO] tweaked toml for crates.io crate maybe_utf8 0.2.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate maybe_utf8 0.2.3 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9af5ae057eb8062951d15cddb6bb18806f760210c0b08d15210f783639c9e7fb
[INFO] running `Command { std: "docker" "start" "-a" "9af5ae057eb8062951d15cddb6bb18806f760210c0b08d15210f783639c9e7fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9af5ae057eb8062951d15cddb6bb18806f760210c0b08d15210f783639c9e7fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9af5ae057eb8062951d15cddb6bb18806f760210c0b08d15210f783639c9e7fb", kill_on_drop: false }`
[INFO] [stdout] 9af5ae057eb8062951d15cddb6bb18806f760210c0b08d15210f783639c9e7fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3212c32e667d6944cda2f6ad774911fa8de4eb77db49944c2b0c5739aa376ece
[INFO] running `Command { std: "docker" "start" "-a" "3212c32e667d6944cda2f6ad774911fa8de4eb77db49944c2b0c5739aa376ece", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling maybe_utf8 v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::borrow::IntoCow`
[INFO] [stdout]   --> lib.rs:66:19
[INFO] [stdout]    |
[INFO] [stdout] 66 | use std::borrow::{IntoCow, Cow, ToOwned};
[INFO] [stdout]    |                   ^^^^^^^ no `IntoCow` in `borrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:360:17
[INFO] [stdout]     |
[INFO] [stdout] 360 |                 try!(write!(f, "b\""));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:363:34
[INFO] [stdout]     |
[INFO] [stdout] 363 |                         b'\t' => try!(write!(f, "\\t")),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:364:34
[INFO] [stdout]     |
[INFO] [stdout] 364 |                         b'\r' => try!(write!(f, "\\r")),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:365:34
[INFO] [stdout]     |
[INFO] [stdout] 365 |                         b'\n' => try!(write!(f, "\\n")),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:366:34
[INFO] [stdout]     |
[INFO] [stdout] 366 |                         b'\\' => try!(write!(f, "\\\\")),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:367:34
[INFO] [stdout]     |
[INFO] [stdout] 367 |                         b'\'' => try!(write!(f, "\\'")),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:368:34
[INFO] [stdout]     |
[INFO] [stdout] 368 |                         b'"'  => try!(write!(f, "\\\"")),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> lib.rs:369:33
[INFO] [stdout]     |
[INFO] [stdout] 369 |                         b'\x20' ... b'\x7e' => try!(write!(f, "{}", c as char)),
[INFO] [stdout]     |                                 ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:369:48
[INFO] [stdout]     |
[INFO] [stdout] 369 |                         b'\x20' ... b'\x7e' => try!(write!(f, "{}", c as char)),
[INFO] [stdout]     |                                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> lib.rs:370:30
[INFO] [stdout]     |
[INFO] [stdout] 370 |                         _ => try!(write!(f, "\\x{}{}",
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core` has been stable since 1.6.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> lib.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 | #![feature(core)]
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maybe_utf8` (lib) due to 1 previous error; 11 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "3212c32e667d6944cda2f6ad774911fa8de4eb77db49944c2b0c5739aa376ece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3212c32e667d6944cda2f6ad774911fa8de4eb77db49944c2b0c5739aa376ece", kill_on_drop: false }`
[INFO] [stdout] 3212c32e667d6944cda2f6ad774911fa8de4eb77db49944c2b0c5739aa376ece
