[INFO] fetching crate tomson 0.1.1...
[INFO] checking tomson-0.1.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate tomson 0.1.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate tomson 0.1.1 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tomson 0.1.1
[INFO] finished tweaking crates.io crate tomson 0.1.1
[INFO] tweaked toml for crates.io crate tomson 0.1.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages
[INFO] [stderr]       Adding toml v0.1.30 (latest: v0.8.12)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded toml v0.1.30
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7065c9c161ffc9a24ab46eba27f71b29caee4ecc6703b8923318d6466f33033e
[INFO] running `Command { std: "docker" "start" "-a" "7065c9c161ffc9a24ab46eba27f71b29caee4ecc6703b8923318d6466f33033e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7065c9c161ffc9a24ab46eba27f71b29caee4ecc6703b8923318d6466f33033e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7065c9c161ffc9a24ab46eba27f71b29caee4ecc6703b8923318d6466f33033e", kill_on_drop: false }`
[INFO] [stdout] 7065c9c161ffc9a24ab46eba27f71b29caee4ecc6703b8923318d6466f33033e
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 058e465a7031d622a5218be5d376bb9a89e4892faa456677192ac9b2f8800cd5
[INFO] running `Command { std: "docker" "start" "-a" "058e465a7031d622a5218be5d376bb9a89e4892faa456677192ac9b2f8800cd5", kill_on_drop: false }`
[INFO] [stderr]     Checking toml v0.1.30
[INFO] [stderr]     Checking tomson v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:56:26
[INFO] [stdout]    |
[INFO] [stdout] 56 | to_json_src_impl_read! { Read, Stdin }
[INFO] [stdout]    |                          ^^^^
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 56 | to_json_src_impl_read! { dyn Read, Stdin }
[INFO] [stdout]    |                          +++
[INFO] [stdout] help: alternatively use a blanket implementation to implement `JsonSrc` for all types that also implement `Read`
[INFO] [stdout]    |
[INFO] [stdout] 46 ~     $(impl<T: Read> JsonSrc for $t {
[INFO] [stdout] 47 |       fn parse(&mut self) ->  Result<json::Json, json::ParserError> { 
[INFO] [stdout]  ...
[INFO] [stdout] 55 | 
[INFO] [stdout] 56 ~ to_json_src_impl_read! { T, Stdin }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:68:26
[INFO] [stdout]    |
[INFO] [stdout] 68 | to_json_src_impl_json! { json::ToJson, json::Json }
[INFO] [stdout]    |                          ^^^^^^^^^^^^
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 68 | to_json_src_impl_json! { dyn json::ToJson, json::Json }
[INFO] [stdout]    |                          +++
[INFO] [stdout] help: alternatively use a blanket implementation to implement `JsonSrc` for all types that also implement `json::ToJson`
[INFO] [stdout]    |
[INFO] [stdout] 60 ~     $(impl<T: json::ToJson> JsonSrc for $t {
[INFO] [stdout] 61 |       fn parse(&mut self) -> Result<json::Json, json::ParserError> {
[INFO] [stdout]  ...
[INFO] [stdout] 67 | 
[INFO] [stdout] 68 ~ to_json_src_impl_json! { T, json::Json }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:56:26
[INFO] [stdout]    |
[INFO] [stdout] 56 | to_json_src_impl_read! { Read, Stdin }
[INFO] [stdout]    |                          ^^^^
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 56 | to_json_src_impl_read! { dyn Read, Stdin }
[INFO] [stdout]    |                          +++
[INFO] [stdout] help: alternatively use a blanket implementation to implement `JsonSrc` for all types that also implement `Read`
[INFO] [stdout]    |
[INFO] [stdout] 46 ~     $(impl<T: Read> JsonSrc for $t {
[INFO] [stdout] 47 |       fn parse(&mut self) ->  Result<json::Json, json::ParserError> { 
[INFO] [stdout]  ...
[INFO] [stdout] 55 | 
[INFO] [stdout] 56 ~ to_json_src_impl_read! { T, Stdin }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:68:26
[INFO] [stdout]    |
[INFO] [stdout] 68 | to_json_src_impl_json! { json::ToJson, json::Json }
[INFO] [stdout]    |                          ^^^^^^^^^^^^
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 68 | to_json_src_impl_json! { dyn json::ToJson, json::Json }
[INFO] [stdout]    |                          +++
[INFO] [stdout] help: alternatively use a blanket implementation to implement `JsonSrc` for all types that also implement `json::ToJson`
[INFO] [stdout]    |
[INFO] [stdout] 60 ~     $(impl<T: json::ToJson> JsonSrc for $t {
[INFO] [stdout] 61 |       fn parse(&mut self) -> Result<json::Json, json::ParserError> {
[INFO] [stdout]  ...
[INFO] [stdout] 67 | 
[INFO] [stdout] 68 ~ to_json_src_impl_json! { T, json::Json }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:132:26
[INFO] [stdout]     |
[INFO] [stdout] 132 | to_toml_src_impl_read! { Read, Stdin }
[INFO] [stdout]     |                          ^^^^
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 132 | to_toml_src_impl_read! { dyn Read, Stdin }
[INFO] [stdout]     |                          +++
[INFO] [stdout] help: alternatively use a blanket implementation to implement `TomlSrc` for all types that also implement `Read`
[INFO] [stdout]     |
[INFO] [stdout] 118 ~     $(impl<T: Read> TomlSrc for $t {
[INFO] [stdout] 119 |       fn parse(&mut self) -> Result<toml::Value, Vec<toml::ParserError>> {
[INFO] [stdout]   ...
[INFO] [stdout] 131 | 
[INFO] [stdout] 132 ~ to_toml_src_impl_read! { T, Stdin }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:147:28
[INFO] [stdout]     |
[INFO] [stdout] 147 |   pub fn as_json(src: &mut TomlSrc) -> Result<json::Json, Vec<toml::ParserError>> {
[INFO] [stdout]     |                            ^^^^^^^
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 147 |   pub fn as_json(src: &mut dyn TomlSrc) -> Result<json::Json, Vec<toml::ParserError>> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:132:26
[INFO] [stdout]     |
[INFO] [stdout] 132 | to_toml_src_impl_read! { Read, Stdin }
[INFO] [stdout]     |                          ^^^^
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 132 | to_toml_src_impl_read! { dyn Read, Stdin }
[INFO] [stdout]     |                          +++
[INFO] [stdout] help: alternatively use a blanket implementation to implement `TomlSrc` for all types that also implement `Read`
[INFO] [stdout]     |
[INFO] [stdout] 118 ~     $(impl<T: Read> TomlSrc for $t {
[INFO] [stdout] 119 |       fn parse(&mut self) -> Result<toml::Value, Vec<toml::ParserError>> {
[INFO] [stdout]   ...
[INFO] [stdout] 131 | 
[INFO] [stdout] 132 ~ to_toml_src_impl_read! { T, Stdin }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:147:28
[INFO] [stdout]     |
[INFO] [stdout] 147 |   pub fn as_json(src: &mut TomlSrc) -> Result<json::Json, Vec<toml::ParserError>> {
[INFO] [stdout]     |                            ^^^^^^^
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 147 |   pub fn as_json(src: &mut dyn TomlSrc) -> Result<json::Json, Vec<toml::ParserError>> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "058e465a7031d622a5218be5d376bb9a89e4892faa456677192ac9b2f8800cd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "058e465a7031d622a5218be5d376bb9a89e4892faa456677192ac9b2f8800cd5", kill_on_drop: false }`
[INFO] [stdout] 058e465a7031d622a5218be5d376bb9a89e4892faa456677192ac9b2f8800cd5