[INFO] fetching crate rustmcp 0.1.0...
[INFO] testing rustmcp-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate rustmcp 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate rustmcp 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate rustmcp 0.1.0
[INFO] tweaked toml for crates.io crate rustmcp 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustmcp 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rustmcp 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wit-bindgen v0.45.0
[INFO] [stderr]   Downloaded wasi v0.14.3+wasi-0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "inspect" "ba4b8dd28a6028f5b7b9328a51f89e38853490044550bba3e311e9197ec42e79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba4b8dd28a6028f5b7b9328a51f89e38853490044550bba3e311e9197ec42e79", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 005890c369bdd2d31b301f1e5a10763718f859744627aa6d12a4afa1d78d5508
[INFO] running `Command { std: "docker" "start" "-a" "005890c369bdd2d31b301f1e5a10763718f859744627aa6d12a4afa1d78d5508", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling generic-array v0.14.7
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[INFO] [stderr]    Compiling serde_json v1.0.143
[INFO] [stderr]    Compiling axum v0.7.9
[INFO] [stderr]    Compiling rustmcp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 44.17s
[INFO] running `Command { std: "docker" "inspect" "005890c369bdd2d31b301f1e5a10763718f859744627aa6d12a4afa1d78d5508", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "005890c369bdd2d31b301f1e5a10763718f859744627aa6d12a4afa1d78d5508", kill_on_drop: false }`
[INFO] [stdout] 005890c369bdd2d31b301f1e5a10763718f859744627aa6d12a4afa1d78d5508
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64d46f211db89c97a2911eb0d45907d33a1a5629973b19b70782d91c17b09675
[INFO] running `Command { std: "docker" "start" "-a" "64d46f211db89c97a2911eb0d45907d33a1a5629973b19b70782d91c17b09675", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustmcp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.78s
[INFO] running `Command { std: "docker" "inspect" "64d46f211db89c97a2911eb0d45907d33a1a5629973b19b70782d91c17b09675", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64d46f211db89c97a2911eb0d45907d33a1a5629973b19b70782d91c17b09675", kill_on_drop: false }`
[INFO] [stdout] 64d46f211db89c97a2911eb0d45907d33a1a5629973b19b70782d91c17b09675
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 554cb4d84a687b567c54134e6464dcdba7b6bae802fc4fcfdf6f38e907091092
[INFO] running `Command { std: "docker" "start" "-a" "554cb4d84a687b567c54134e6464dcdba7b6bae802fc4fcfdf6f38e907091092", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustmcp-d27e3d911dbf6fe9)
[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] [stderr]    Doc-tests rustmcp
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/server/mod.rs - server (line 12) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 59) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 16) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/server/mod.rs - server (line 12) stdout ----
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/server/mod.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Some(vec!["utility".to_string()]),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `String`, found `Vec<String>`
[INFO] [stdout]    |     |
[INFO] [stdout]    |     arguments to this enum variant are incorrect
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `std::string::String`
[INFO] [stdout]               found struct `Vec<std::string::String>`
[INFO] [stdout] help: the type constructed contains `Vec<std::string::String>` due to the type of the argument passed
[INFO] [stdout]   --> src/server/mod.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Some(vec!["utility".to_string()]),
[INFO] [stdout]    |     ^^^^^---------------------------^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          this argument influences the type of `Some`
[INFO] [stdout] note: tuple variant defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/option.rs:601:5
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 9 arguments but 7 arguments were supplied
[INFO] [stdout]    --> src/server/mod.rs:20:17
[INFO] [stdout]     |
[INFO] [stdout]  11 |   let echo_tool = FunctionTool::from_function(
[INFO] [stdout]     |  _________________^^^^^^^^^^^^^^^^^^^^^^^^^^^-
[INFO] [stdout]  12 | |     |_args: Option<std::collections::HashMap<String, serde_json::Value>>| -> Result<serde_json::Value, String> {
[INFO] [stdout]  13 | |         let message = _args
[INFO] [stdout]  14 | |             .as_ref()
[INFO] [stdout] ...   |
[INFO] [stdout]  34 | |     None,
[INFO] [stdout]  35 | | );
[INFO] [stdout]     | |_- two arguments of type `Option<Vec<std::string::String>>` and `Option<Value>` are missing
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/server/tools.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn from_function<F>(
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] help: provide the arguments
[INFO] [stdout]     |
[INFO] [stdout]  11 ~ let echo_tool = FunctionTool::from_function(|_args: Option<std::collections::HashMap<String, serde_json::Value>>| -> Result<serde_json::Value, String> {
[INFO] [stdout]  12 +         let message = _args
[INFO] [stdout]  13 +             .as_ref()
[INFO] [stdout]  14 +             .and_then(|m| m.get("message"))
[INFO] [stdout]  15 +             .and_then(|v| v.as_str())
[INFO] [stdout]  16 +             .unwrap_or("Hello, World!");
[INFO] [stdout]  17 +         Ok(serde_json::Value::String(message.to_string()))
[INFO] [stdout]  18 +     }, Some("echo".to_string()), Some("Echoes back the provided message".to_string()), Some(vec!["utility".to_string()]), Some(serde_json::json!({
[INFO] [stdout]  19 +         "type": "object",
[INFO] [stdout]  20 +         "properties": {
[INFO] [stdout]  21 +             "message": {
[INFO] [stdout]  22 +                 "type": "string",
[INFO] [stdout]  23 +                 "description": "The message to echo"
[INFO] [stdout]  24 +             }
[INFO] [stdout]  25 +         },
[INFO] [stdout]  26 +         "required": ["message"]
[INFO] [stdout]  27 ~     })), None, None, /* Option<Vec<std::string::String>> */, /* Option<Value> */);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0308.
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 59) stdout ----
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:81:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Some(vec!["utility".to_string()]),
[INFO] [stdout]    |         ---- ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `String`, found `Vec<String>`
[INFO] [stdout]    |         |
[INFO] [stdout]    |         arguments to this enum variant are incorrect
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `std::string::String`
[INFO] [stdout]               found struct `Vec<std::string::String>`
[INFO] [stdout] help: the type constructed contains `Vec<std::string::String>` due to the type of the argument passed
[INFO] [stdout]   --> src/lib.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Some(vec!["utility".to_string()]),
[INFO] [stdout]    |         ^^^^^---------------------------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              this argument influences the type of `Some`
[INFO] [stdout] note: tuple variant defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/option.rs:601:5
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 9 arguments but 7 arguments were supplied
[INFO] [stdout]    --> src/lib.rs:70:21
[INFO] [stdout]     |
[INFO] [stdout]  13 |       let echo_tool = FunctionTool::from_function(
[INFO] [stdout]     |  _____________________^^^^^^^^^^^^^^^^^^^^^^^^^^^-
[INFO] [stdout]  14 | |         |_args: Option<HashMap<String, Value>>| -> Result<Value, String> {
[INFO] [stdout]  15 | |             let message = _args
[INFO] [stdout]  16 | |                 .as_ref()
[INFO] [stdout] ...   |
[INFO] [stdout]  36 | |         None,
[INFO] [stdout]  37 | |     );
[INFO] [stdout]     | |_____- two arguments of type `Option<Vec<std::string::String>>` and `Option<Value>` are missing
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/server/tools.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn from_function<F>(
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] help: provide the arguments
[INFO] [stdout]     |
[INFO] [stdout]  13 ~     let echo_tool = FunctionTool::from_function(|_args: Option<HashMap<String, Value>>| -> Result<Value, String> {
[INFO] [stdout]  14 +             let message = _args
[INFO] [stdout]  15 +                 .as_ref()
[INFO] [stdout]  16 +                 .and_then(|m| m.get("message"))
[INFO] [stdout]  17 +                 .and_then(|v| v.as_str())
[INFO] [stdout]  18 +                 .unwrap_or("Hello, World!");
[INFO] [stdout]  19 +             Ok(Value::String(message.to_string()))
[INFO] [stdout]  20 +         }, Some("echo".to_string()), Some("Echoes back the provided message".to_string()), Some(vec!["utility".to_string()]), Some(serde_json::json!({
[INFO] [stdout]  21 +             "type": "object",
[INFO] [stdout]  22 +             "properties": {
[INFO] [stdout]  23 +                 "message": {
[INFO] [stdout]  24 +                     "type": "string",
[INFO] [stdout]  25 +                     "description": "The message to echo"
[INFO] [stdout]  26 +                 }
[INFO] [stdout]  27 +             },
[INFO] [stdout]  28 +             "required": ["message"]
[INFO] [stdout]  29 ~         })), None, None, /* Option<Vec<std::string::String>> */, /* Option<Value> */);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0308.
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 16) stdout ----
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:41:14
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Some(vec!["greeting".to_string()]),
[INFO] [stdout]    |         ---- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `String`, found `Vec<String>`
[INFO] [stdout]    |         |
[INFO] [stdout]    |         arguments to this enum variant are incorrect
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `std::string::String`
[INFO] [stdout]               found struct `Vec<std::string::String>`
[INFO] [stdout] help: the type constructed contains `Vec<std::string::String>` due to the type of the argument passed
[INFO] [stdout]   --> src/lib.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Some(vec!["greeting".to_string()]),
[INFO] [stdout]    |         ^^^^^----------------------------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              this argument influences the type of `Some`
[INFO] [stdout] note: tuple variant defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/option.rs:601:5
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 9 arguments but 6 arguments were supplied
[INFO] [stdout]    --> src/lib.rs:37:31
[INFO] [stdout]     |
[INFO] [stdout]  23 |       let greet_function_tool = FunctionTool::from_function(
[INFO] [stdout]     |  _______________________________^^^^^^^^^^^^^^^^^^^^^^^^^^^-
[INFO] [stdout]  24 | |         greet_tool,
[INFO] [stdout]  25 | |         Some("greet".to_string()),
[INFO] [stdout]  26 | |         Some("Greets a person by name".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout]  29 | |         None,
[INFO] [stdout]  30 | |     );
[INFO] [stdout]     | |_____- three arguments of type `Option<ToolAnnotations>`, `Option<Vec<std::string::String>>`, and `Option<Value>` are missing
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/server/tools.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn from_function<F>(
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] help: provide the arguments
[INFO] [stdout]     |
[INFO] [stdout]  23 -     let greet_function_tool = FunctionTool::from_function(
[INFO] [stdout]  24 -         greet_tool,
[INFO] [stdout]  25 -         Some("greet".to_string()),
[INFO] [stdout]  26 -         Some("Greets a person by name".to_string()),
[INFO] [stdout]  27 -         Some(vec!["greeting".to_string()]),
[INFO] [stdout]  28 -         None,
[INFO] [stdout]  29 -         None,
[INFO] [stdout]  30 -     );
[INFO] [stdout]  23 +     let greet_function_tool = FunctionTool::from_function(greet_tool, Some("greet".to_string()), Some("Greets a person by name".to_string()), Some(vec!["greeting".to_string()]), None, None, /* Option<ToolAnnotations> */, /* Option<Vec<std::string::String>> */, /* Option<Value> */);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:52:33
[INFO] [stdout]     |
[INFO] [stdout]  38 |     match rustmcp.mcp_call_tool("greet".to_string(), Some(args)).await {
[INFO] [stdout]     |                   ------------- ^^^^^^^^^^^^^^^^^^^ expected `&str`, found `String`
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   arguments to this method are incorrect
[INFO] [stdout]     |
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/server/mod.rs:149:18
[INFO] [stdout]     |
[INFO] [stdout] 149 |     pub async fn mcp_call_tool(&self, name: &str, arguments: Option<HashMap<String, Value>>) -> Result<Value, String> {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^
[INFO] [stdout] help: try removing the method call
[INFO] [stdout]     |
[INFO] [stdout]  38 -     match rustmcp.mcp_call_tool("greet".to_string(), Some(args)).await {
[INFO] [stdout]  38 +     match rustmcp.mcp_call_tool("greet", Some(args)).await {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0308.
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 16)
[INFO] [stdout]     src/lib.rs - (line 59)
[INFO] [stdout]     src/server/mod.rs - server (line 12)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.31s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "554cb4d84a687b567c54134e6464dcdba7b6bae802fc4fcfdf6f38e907091092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "554cb4d84a687b567c54134e6464dcdba7b6bae802fc4fcfdf6f38e907091092", kill_on_drop: false }`
[INFO] [stdout] 554cb4d84a687b567c54134e6464dcdba7b6bae802fc4fcfdf6f38e907091092
