[INFO] updating cached repository panzi/rust-json-builder
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/panzi/rust-json-builder
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/panzi/rust-json-builder" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/panzi/rust-json-builder"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/panzi/rust-json-builder'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/panzi/rust-json-builder" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/panzi/rust-json-builder"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/panzi/rust-json-builder'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 55a32321d40ad0f6ff02f1fba733afca27c31991
[INFO] sha for GitHub repo panzi/rust-json-builder: 55a32321d40ad0f6ff02f1fba733afca27c31991
[INFO] validating manifest of panzi/rust-json-builder on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of panzi/rust-json-builder on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing panzi/rust-json-builder
[INFO] finished frobbing panzi/rust-json-builder
[INFO] frobbed toml for panzi/rust-json-builder written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/panzi/rust-json-builder/Cargo.toml
[INFO] started frobbing panzi/rust-json-builder
[INFO] finished frobbing panzi/rust-json-builder
[INFO] frobbed toml for panzi/rust-json-builder written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/panzi/rust-json-builder/Cargo.toml
[INFO] crate panzi/rust-json-builder already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking panzi/rust-json-builder against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-2/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/panzi/rust-json-builder:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b877a4364fd45118e9691d4789275983904fd1a156b30020c2f61184981e5e06
[INFO] running `"docker" "start" "-a" "b877a4364fd45118e9691d4789275983904fd1a156b30020c2f61184981e5e06"`
[INFO] [stderr]     Checking json_builder v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/json_builder.rs:26:18
[INFO] [stderr]    |
[INFO] [stderr] 26 |     writer: &'a mut Write,
[INFO] [stderr]    |                     ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/json_builder.rs:66:42
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn escape_json(s: &str, writer: &mut Write) -> std::io::Result<()> {
[INFO] [stderr]    |                                          ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/json_builder.rs:135:26
[INFO] [stderr]     |
[INFO] [stderr] 135 |     pub fn new(writer: &mut Write) -> JSONBuilder {
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/json_builder.rs:144:33
[INFO] [stderr]     |
[INFO] [stderr] 144 |     pub fn new_pretty(writer: &mut Write, indent_size: usize, tab_indent: bool) -> JSONBuilder {
[INFO] [stderr]     |                                    ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/json_builder.rs:365:27
[INFO] [stderr]     |
[INFO] [stderr] 365 | impl<'a> IntoJSON for &'a IntoJSON {
[INFO] [stderr]     |                           ^^^^^^^^ help: use `dyn`: `dyn IntoJSON`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/json_builder.rs:26:18
[INFO] [stderr]    |
[INFO] [stderr] 26 |     writer: &'a mut Write,
[INFO] [stderr]    |                     ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/json_builder.rs:66:42
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn escape_json(s: &str, writer: &mut Write) -> std::io::Result<()> {
[INFO] [stderr]    |                                          ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/json_builder.rs:135:26
[INFO] [stderr]     |
[INFO] [stderr] 135 |     pub fn new(writer: &mut Write) -> JSONBuilder {
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/json_builder.rs:144:33
[INFO] [stderr]     |
[INFO] [stderr] 144 |     pub fn new_pretty(writer: &mut Write, indent_size: usize, tab_indent: bool) -> JSONBuilder {
[INFO] [stderr]     |                                    ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/json_builder.rs:365:27
[INFO] [stderr]     |
[INFO] [stderr] 365 | impl<'a> IntoJSON for &'a IntoJSON {
[INFO] [stderr]     |                           ^^^^^^^^ help: use `dyn`: `dyn IntoJSON`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "b877a4364fd45118e9691d4789275983904fd1a156b30020c2f61184981e5e06"`
[INFO] running `"docker" "rm" "-f" "b877a4364fd45118e9691d4789275983904fd1a156b30020c2f61184981e5e06"`
[INFO] [stdout] b877a4364fd45118e9691d4789275983904fd1a156b30020c2f61184981e5e06