[INFO] fetching crate debug-builders 0.1.0...
[INFO] testing debug-builders-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate debug-builders 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate debug-builders 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate debug-builders 0.1.0
[INFO] finished tweaking crates.io crate debug-builders 0.1.0
[INFO] tweaked toml for crates.io crate debug-builders 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4369f0fa96699b89e5e89a60cc7a503a37d51e34b3b09a405c08a49f9d1f7328
[INFO] running `Command { std: "docker" "start" "-a" "4369f0fa96699b89e5e89a60cc7a503a37d51e34b3b09a405c08a49f9d1f7328", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4369f0fa96699b89e5e89a60cc7a503a37d51e34b3b09a405c08a49f9d1f7328", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4369f0fa96699b89e5e89a60cc7a503a37d51e34b3b09a405c08a49f9d1f7328", kill_on_drop: false }`
[INFO] [stdout] 4369f0fa96699b89e5e89a60cc7a503a37d51e34b3b09a405c08a49f9d1f7328
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c011cd8a6d1b45e0b308344626d6b49d45a489e4e6024f6db3c70630ab96f41
[INFO] running `Command { std: "docker" "start" "-a" "7c011cd8a6d1b45e0b308344626d6b49d45a489e4e6024f6db3c70630ab96f41", kill_on_drop: false }`
[INFO] [stderr]    Compiling debug-builders v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             try!(self.fmt.write_str(&s[..split]));
[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]   --> src/lib.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |                 try!(self.fmt.write_str("    "));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:79:48
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn field(mut self, name: &str, value: &fmt::Debug) -> DebugStruct<'a, 'b> {
[INFO] [stdout]    |                                                ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:139:36
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn field(mut self, value: &fmt::Debug) -> DebugTuple<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:186:33
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn entry(&mut self, entry: &fmt::Debug) {
[INFO] [stdout]     |                                 ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:231:36
[INFO] [stdout]     |
[INFO] [stdout] 231 |     pub fn entry(mut self, entry: &fmt::Debug) -> DebugSet<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:264:36
[INFO] [stdout]     |
[INFO] [stdout] 264 |     pub fn entry(mut self, entry: &fmt::Debug) -> DebugList<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:297:34
[INFO] [stdout]     |
[INFO] [stdout] 297 |     pub fn entry(mut self, key: &fmt::Debug, value: &fmt::Debug) -> DebugMap<'a, 'b> {
[INFO] [stdout]     |                                  ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:297:54
[INFO] [stdout]     |
[INFO] [stdout] 297 |     pub fn entry(mut self, key: &fmt::Debug, value: &fmt::Debug) -> DebugMap<'a, 'b> {
[INFO] [stdout]     |                                                      ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:115:18
[INFO] [stdout]     |
[INFO] [stdout] 115 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:175:18
[INFO] [stdout]     |
[INFO] [stdout] 175 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:207:18
[INFO] [stdout]     |
[INFO] [stdout] 207 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:321:18
[INFO] [stdout]     |
[INFO] [stdout] 321 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]   --> src/lib.rs:11:22
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fmt::{self, Write};
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "7c011cd8a6d1b45e0b308344626d6b49d45a489e4e6024f6db3c70630ab96f41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c011cd8a6d1b45e0b308344626d6b49d45a489e4e6024f6db3c70630ab96f41", kill_on_drop: false }`
[INFO] [stdout] 7c011cd8a6d1b45e0b308344626d6b49d45a489e4e6024f6db3c70630ab96f41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1771b62bb7f9dd38693d3fc82cb22dee719c7a1f6f9932eabf4abaa2adbafa9e
[INFO] running `Command { std: "docker" "start" "-a" "1771b62bb7f9dd38693d3fc82cb22dee719c7a1f6f9932eabf4abaa2adbafa9e", kill_on_drop: false }`
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             try!(self.fmt.write_str(&s[..split]));
[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]   --> src/lib.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |                 try!(self.fmt.write_str("    "));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:79:48
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn field(mut self, name: &str, value: &fmt::Debug) -> DebugStruct<'a, 'b> {
[INFO] [stdout]    |                                                ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling debug-builders v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:139:36
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn field(mut self, value: &fmt::Debug) -> DebugTuple<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:186:33
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn entry(&mut self, entry: &fmt::Debug) {
[INFO] [stdout]     |                                 ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:231:36
[INFO] [stdout]     |
[INFO] [stdout] 231 |     pub fn entry(mut self, entry: &fmt::Debug) -> DebugSet<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:264:36
[INFO] [stdout]     |
[INFO] [stdout] 264 |     pub fn entry(mut self, entry: &fmt::Debug) -> DebugList<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:297:34
[INFO] [stdout]     |
[INFO] [stdout] 297 |     pub fn entry(mut self, key: &fmt::Debug, value: &fmt::Debug) -> DebugMap<'a, 'b> {
[INFO] [stdout]     |                                  ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:297:54
[INFO] [stdout]     |
[INFO] [stdout] 297 |     pub fn entry(mut self, key: &fmt::Debug, value: &fmt::Debug) -> DebugMap<'a, 'b> {
[INFO] [stdout]     |                                                      ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:115:18
[INFO] [stdout]     |
[INFO] [stdout] 115 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:175:18
[INFO] [stdout]     |
[INFO] [stdout] 175 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:207:18
[INFO] [stdout]     |
[INFO] [stdout] 207 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:321:18
[INFO] [stdout]     |
[INFO] [stdout] 321 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]   --> src/lib.rs:11:22
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fmt::{self, Write};
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             try!(self.fmt.write_str(&s[..split]));
[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]   --> src/lib.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |                 try!(self.fmt.write_str("    "));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:79:48
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn field(mut self, name: &str, value: &fmt::Debug) -> DebugStruct<'a, 'b> {
[INFO] [stdout]    |                                                ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:139:36
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn field(mut self, value: &fmt::Debug) -> DebugTuple<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:186:33
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn entry(&mut self, entry: &fmt::Debug) {
[INFO] [stdout]     |                                 ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:231:36
[INFO] [stdout]     |
[INFO] [stdout] 231 |     pub fn entry(mut self, entry: &fmt::Debug) -> DebugSet<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:264:36
[INFO] [stdout]     |
[INFO] [stdout] 264 |     pub fn entry(mut self, entry: &fmt::Debug) -> DebugList<'a, 'b> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:297:34
[INFO] [stdout]     |
[INFO] [stdout] 297 |     pub fn entry(mut self, key: &fmt::Debug, value: &fmt::Debug) -> DebugMap<'a, 'b> {
[INFO] [stdout]     |                                  ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:297:54
[INFO] [stdout]     |
[INFO] [stdout] 297 |     pub fn entry(mut self, key: &fmt::Debug, value: &fmt::Debug) -> DebugMap<'a, 'b> {
[INFO] [stdout]     |                                                      ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:115:18
[INFO] [stdout]     |
[INFO] [stdout] 115 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:175:18
[INFO] [stdout]     |
[INFO] [stdout] 175 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:207:18
[INFO] [stdout]     |
[INFO] [stdout] 207 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stdout]    --> src/lib.rs:321:18
[INFO] [stdout]     |
[INFO] [stdout] 321 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]   --> src/lib.rs:11:22
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fmt::{self, Write};
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "1771b62bb7f9dd38693d3fc82cb22dee719c7a1f6f9932eabf4abaa2adbafa9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1771b62bb7f9dd38693d3fc82cb22dee719c7a1f6f9932eabf4abaa2adbafa9e", kill_on_drop: false }`
[INFO] [stdout] 1771b62bb7f9dd38693d3fc82cb22dee719c7a1f6f9932eabf4abaa2adbafa9e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 15717033d45cbedfd9b55679f9bd28ecd0bf2e7d3037e289721b4833b373797e
[INFO] running `Command { std: "docker" "start" "-a" "15717033d45cbedfd9b55679f9bd28ecd0bf2e7d3037e289721b4833b373797e", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout] running 20 tests
[INFO] [stderr]   --> src/lib.rs:49:13
[INFO] [stdout] test test::debug_list::test_empty ... ok
[INFO] [stderr]    |
[INFO] [stdout] test test::debug_list::test_nested ... ok
[INFO] [stderr] 49 |             try!(self.fmt.write_str(&s[..split]));
[INFO] [stdout] test test::debug_list::test_single ... ok
[INFO] [stderr]    |             ^^^
[INFO] [stdout] test test::debug_map::test_multiple ... ok
[INFO] [stderr]    |
[INFO] [stdout] test test::debug_set::test_empty ... ok
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] test test::debug_set::test_multiple ... ok
[INFO] [stderr] 
[INFO] [stdout] test test::debug_set::test_nested ... ok
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout] test test::debug_struct::test_single ... ok
[INFO] [stderr]   --> src/lib.rs:36:17
[INFO] [stdout] test test::debug_tuple::test_empty ... ok
[INFO] [stderr]    |
[INFO] [stdout] test test::debug_map::test_single ... ok
[INFO] [stderr] 36 |                 try!(self.fmt.write_str("    "));
[INFO] [stdout] test test::debug_tuple::test_single ... ok
[INFO] [stderr]    |                 ^^^
[INFO] [stdout] test test::debug_struct::test_nested ... ok
[INFO] [stderr] 
[INFO] [stdout] test test::debug_struct::test_multiple ... ok
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout] test test::debug_set::test_single ... ok
[INFO] [stderr]   --> src/lib.rs:79:48
[INFO] [stdout] test test::debug_tuple::test_nested ... ok
[INFO] [stderr]    |
[INFO] [stderr] 79 |     pub fn field(mut self, name: &str, value: &fmt::Debug) -> DebugStruct<'a, 'b> {
[INFO] [stderr]    |                                                ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:139:36
[INFO] [stderr]     |
[INFO] [stderr] 139 |     pub fn field(mut self, value: &fmt::Debug) -> DebugTuple<'a, 'b> {
[INFO] [stderr]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:186:33
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn entry(&mut self, entry: &fmt::Debug) {
[INFO] [stderr]     |                                 ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:231:36
[INFO] [stderr]     |
[INFO] [stderr] 231 |     pub fn entry(mut self, entry: &fmt::Debug) -> DebugSet<'a, 'b> {
[INFO] [stderr]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:264:36
[INFO] [stderr]     |
[INFO] [stderr] 264 |     pub fn entry(mut self, entry: &fmt::Debug) -> DebugList<'a, 'b> {
[INFO] [stderr]     |                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:297:34
[INFO] [stderr]     |
[INFO] [stderr] 297 |     pub fn entry(mut self, key: &fmt::Debug, value: &fmt::Debug) -> DebugMap<'a, 'b> {
[INFO] [stderr]     |                                  ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:297:54
[INFO] [stderr]     |
[INFO] [stderr] 297 |     pub fn entry(mut self, key: &fmt::Debug, value: &fmt::Debug) -> DebugMap<'a, 'b> {
[INFO] [stderr]     |                                                      ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stderr]    --> src/lib.rs:115:18
[INFO] [stderr]     |
[INFO] [stderr] 115 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stderr]     |                  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stderr]    --> src/lib.rs:175:18
[INFO] [stderr]     |
[INFO] [stderr] 175 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stderr]     |                  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stderr]    --> src/lib.rs:207:18
[INFO] [stderr]     |
[INFO] [stderr] 207 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stderr]     |                  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::fmt::Formatter::<'a>::flags`: use the `sign_plus`, `sign_minus`, `alternate`, or `sign_aware_zero_pad` methods instead
[INFO] [stderr]    --> src/lib.rs:321:18
[INFO] [stderr]     |
[INFO] [stderr] 321 |         self.fmt.flags() & ALTERNATE_MASK != 0
[INFO] [stderr]     |                  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]   --> src/lib.rs:11:22
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::fmt::{self, Write};
[INFO] [stderr]    |                      ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `debug-builders` (lib) generated 14 warnings
[INFO] [stderr] warning: `debug-builders` (lib test) generated 14 warnings (14 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/debug_builders-59e6f787dfa6eebd)
[INFO] [stdout] test test::debug_tuple::test_multiple ... ok
[INFO] [stderr]    Doc-tests debug-builders
[INFO] [stdout] test test::debug_map::test_nested ... ok
[INFO] [stdout] test test::debug_map::test_empty ... ok
[INFO] [stdout] test test::debug_list::test_multiple ... ok
[INFO] [stdout] test test::debug_struct::test_empty ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "15717033d45cbedfd9b55679f9bd28ecd0bf2e7d3037e289721b4833b373797e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15717033d45cbedfd9b55679f9bd28ecd0bf2e7d3037e289721b4833b373797e", kill_on_drop: false }`
[INFO] [stdout] 15717033d45cbedfd9b55679f9bd28ecd0bf2e7d3037e289721b4833b373797e