[INFO] fetching crate serde-value-flatten 0.1.0...
[INFO] testing serde-value-flatten-0.1.0 against 1.75.0 for beta-1.76-1
[INFO] extracting crate serde-value-flatten 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate serde-value-flatten 0.1.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde-value-flatten 0.1.0
[INFO] finished tweaking crates.io crate serde-value-flatten 0.1.0
[INFO] tweaked toml for crates.io crate serde-value-flatten 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 296d81106e9abf3308aac8c7dc9d413cdf98b701181cec582c0175854cda3e15
[INFO] running `Command { std: "docker" "start" "-a" "296d81106e9abf3308aac8c7dc9d413cdf98b701181cec582c0175854cda3e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "296d81106e9abf3308aac8c7dc9d413cdf98b701181cec582c0175854cda3e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "296d81106e9abf3308aac8c7dc9d413cdf98b701181cec582c0175854cda3e15", kill_on_drop: false }`
[INFO] [stdout] 296d81106e9abf3308aac8c7dc9d413cdf98b701181cec582c0175854cda3e15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9796a27c7b440b78ee7696582231b93c20f0886b930bd94ac29f0c70be2c3664
[INFO] running `Command { std: "docker" "start" "-a" "9796a27c7b440b78ee7696582231b93c20f0886b930bd94ac29f0c70be2c3664", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling ordered-float v1.1.1
[INFO] [stderr]    Compiling serde-value v0.6.0
[INFO] [stderr]    Compiling serde-value-flatten v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.12s
[INFO] running `Command { std: "docker" "inspect" "9796a27c7b440b78ee7696582231b93c20f0886b930bd94ac29f0c70be2c3664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9796a27c7b440b78ee7696582231b93c20f0886b930bd94ac29f0c70be2c3664", kill_on_drop: false }`
[INFO] [stdout] 9796a27c7b440b78ee7696582231b93c20f0886b930bd94ac29f0c70be2c3664
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 24ee833dda9b287b288bcb8f60d267187de296ca7d345e017d5b4761e583576a
[INFO] running `Command { std: "docker" "start" "-a" "24ee833dda9b287b288bcb8f60d267187de296ca7d345e017d5b4761e583576a", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling serde-value-flatten v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "24ee833dda9b287b288bcb8f60d267187de296ca7d345e017d5b4761e583576a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24ee833dda9b287b288bcb8f60d267187de296ca7d345e017d5b4761e583576a", kill_on_drop: false }`
[INFO] [stdout] 24ee833dda9b287b288bcb8f60d267187de296ca7d345e017d5b4761e583576a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 977fee394ec4c90a6178705003a2ae0afa7a99cb8e1d778334991df33202437f
[INFO] running `Command { std: "docker" "start" "-a" "977fee394ec4c90a6178705003a2ae0afa7a99cb8e1d778334991df33202437f", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serde_value_flatten-bcda1b62671e6d78)
[INFO] [stderr]    Doc-tests serde-value-flatten
[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] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 32) ... FAILED
[INFO] [stdout] test src/lib.rs - to_flatten_maptree (line 115) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 32) stdout ----
[INFO] [stdout] error: cannot find derive macro `Serialize` in this scope
[INFO] [stdout]  --> src/lib.rs:34:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Serialize, Clone, Debug)]
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Serialize` in this scope
[INFO] [stdout]   --> src/lib.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[derive(Serialize, Clone, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Foo: serde::ser::Serialize` is not satisfied
[INFO] [stdout]    --> src/lib.rs:50:71
[INFO] [stdout]     |
[INFO] [stdout] 20  |     let ser = serde_value_flatten::to_flatten_maptree("_", Some("_"), &foo).unwrap();
[INFO] [stdout]     |               ---------------------------------------                 ^^^^ the trait `serde::ser::Serialize` is not implemented for `Foo`
[INFO] [stdout]     |               |
[INFO] [stdout]     |               required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = help: the following other types implement trait `serde::ser::Serialize`:
[INFO] [stdout]               bool
[INFO] [stdout]               char
[INFO] [stdout]               isize
[INFO] [stdout]               i8
[INFO] [stdout]               i16
[INFO] [stdout]               i32
[INFO] [stdout]               i64
[INFO] [stdout]               i128
[INFO] [stdout]             and 128 others
[INFO] [stdout] note: required by a bound in `to_flatten_maptree`
[INFO] [stdout]    --> /opt/rustwide/workdir/src/lib.rs:149:14
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub fn to_flatten_maptree<T: ?Sized>(key_separator: &str, prefix: Option<&str>, src: &T) -> Result<BTreeMap<serde_value::Value, serde_val...
[INFO] [stdout]     |        ------------------ required by a bound in this function
[INFO] [stdout] 149 |     where T: serde::Serialize {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ required by this bound in `to_flatten_maptree`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serde_json`
[INFO] [stdout]   --> src/lib.rs:52:20
[INFO] [stdout]    |
[INFO] [stdout] 22 |     println!("{}", serde_json::to_string_pretty(&ser).unwrap());
[INFO] [stdout]    |                    ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - to_flatten_maptree (line 115) stdout ----
[INFO] [stdout] error: cannot find derive macro `Serialize` in this scope
[INFO] [stdout]  --> src/lib.rs:117:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Serialize, Clone, Debug)]
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Serialize` in this scope
[INFO] [stdout]   --> src/lib.rs:123:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[derive(Serialize, Clone, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Foo: serde::ser::Serialize` is not satisfied
[INFO] [stdout]    --> src/lib.rs:133:66
[INFO] [stdout]     |
[INFO] [stdout] 20  |     let ser = serde_value_flatten::to_flatten_maptree("|", None, &foo).unwrap();
[INFO] [stdout]     |               ---------------------------------------            ^^^^ the trait `serde::ser::Serialize` is not implemented for `Foo`
[INFO] [stdout]     |               |
[INFO] [stdout]     |               required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = help: the following other types implement trait `serde::ser::Serialize`:
[INFO] [stdout]               bool
[INFO] [stdout]               char
[INFO] [stdout]               isize
[INFO] [stdout]               i8
[INFO] [stdout]               i16
[INFO] [stdout]               i32
[INFO] [stdout]               i64
[INFO] [stdout]               i128
[INFO] [stdout]             and 128 others
[INFO] [stdout] note: required by a bound in `to_flatten_maptree`
[INFO] [stdout]    --> /opt/rustwide/workdir/src/lib.rs:149:14
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub fn to_flatten_maptree<T: ?Sized>(key_separator: &str, prefix: Option<&str>, src: &T) -> Result<BTreeMap<serde_value::Value, serde_val...
[INFO] [stdout]     |        ------------------ required by a bound in this function
[INFO] [stdout] 149 |     where T: serde::Serialize {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ required by this bound in `to_flatten_maptree`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serde_json`
[INFO] [stdout]   --> src/lib.rs:135:20
[INFO] [stdout]    |
[INFO] [stdout] 22 |     println!("{}", serde_json::to_string_pretty(&ser).unwrap());
[INFO] [stdout]    |                    ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 32)
[INFO] [stdout]     src/lib.rs - to_flatten_maptree (line 115)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "977fee394ec4c90a6178705003a2ae0afa7a99cb8e1d778334991df33202437f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "977fee394ec4c90a6178705003a2ae0afa7a99cb8e1d778334991df33202437f", kill_on_drop: false }`
[INFO] [stdout] 977fee394ec4c90a6178705003a2ae0afa7a99cb8e1d778334991df33202437f
