[INFO] fetching crate firerust 1.0.1...
[INFO] testing firerust-1.0.1 against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940-2
[INFO] extracting crate firerust 1.0.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate firerust 1.0.1 on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate firerust 1.0.1
[INFO] finished tweaking crates.io crate firerust 1.0.1
[INFO] tweaked toml for crates.io crate firerust 1.0.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate firerust 1.0.1 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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 134b2c636addcfabc6834ec5a50e5097c5f7c2fd3135fe13f096b8a6c62f21d4
[INFO] running `Command { std: "docker" "start" "-a" "134b2c636addcfabc6834ec5a50e5097c5f7c2fd3135fe13f096b8a6c62f21d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "134b2c636addcfabc6834ec5a50e5097c5f7c2fd3135fe13f096b8a6c62f21d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "134b2c636addcfabc6834ec5a50e5097c5f7c2fd3135fe13f096b8a6c62f21d4", kill_on_drop: false }`
[INFO] [stdout] 134b2c636addcfabc6834ec5a50e5097c5f7c2fd3135fe13f096b8a6c62f21d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9e94f63f31e65da319b17780a413120cf06003b039fb24e3a3a9cf1ca3c05fd
[INFO] running `Command { std: "docker" "start" "-a" "b9e94f63f31e65da319b17780a413120cf06003b039fb24e3a3a9cf1ca3c05fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling unicode-bidi v0.3.7
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling ryu v1.0.9
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling firerust v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.55s
[INFO] running `Command { std: "docker" "inspect" "b9e94f63f31e65da319b17780a413120cf06003b039fb24e3a3a9cf1ca3c05fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9e94f63f31e65da319b17780a413120cf06003b039fb24e3a3a9cf1ca3c05fd", kill_on_drop: false }`
[INFO] [stdout] b9e94f63f31e65da319b17780a413120cf06003b039fb24e3a3a9cf1ca3c05fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96e49c05a21bf3d22f4c9a9741b75ca1158bf2ae2e1a9db728df5214ee69c0ae
[INFO] running `Command { std: "docker" "start" "-a" "96e49c05a21bf3d22f4c9a9741b75ca1158bf2ae2e1a9db728df5214ee69c0ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling firerust v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `Command { std: "docker" "inspect" "96e49c05a21bf3d22f4c9a9741b75ca1158bf2ae2e1a9db728df5214ee69c0ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96e49c05a21bf3d22f4c9a9741b75ca1158bf2ae2e1a9db728df5214ee69c0ae", kill_on_drop: false }`
[INFO] [stdout] 96e49c05a21bf3d22f4c9a9741b75ca1158bf2ae2e1a9db728df5214ee69c0ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8aadc59bfd269225735b0c9783253148aaf71687fbf0ac41df1be8f7a81ce9b2
[INFO] running `Command { std: "docker" "start" "-a" "8aadc59bfd269225735b0c9783253148aaf71687fbf0ac41df1be8f7a81ce9b2", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/firerust-ea50af6f5a1d953b)
[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 firerust
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test src/lib.rs - FirebaseClient::reference (line 110) ... FAILED
[INFO] [stdout] test src/lib.rs - RealtimeReference::set (line 181) ... FAILED
[INFO] [stdout] test src/connector.rs - connector::Connector::reconnect (line 53) ... FAILED
[INFO] [stdout] test src/lib.rs - RealtimeReference::delete (line 259) ... FAILED
[INFO] [stdout] test src/connector.rs - connector::Connector::request (line 83) ... FAILED
[INFO] [stdout] test src/lib.rs - RealtimeReference::update (line 233) ... FAILED
[INFO] [stdout] test src/lib.rs - FirebaseClient::new (line 60) ... FAILED
[INFO] [stdout] test src/lib.rs - RealtimeReference::on_snapshot (line 281) ... FAILED
[INFO] [stdout] test src/lib.rs - RealtimeReference::child (line 141) ... FAILED
[INFO] [stdout] test src/lib.rs - RealtimeReference::get (line 155) ... FAILED
[INFO] [stdout] test src/lib.rs - RealtimeReference::set_unique (line 207) ... FAILED
[INFO] [stdout] test src/lib.rs - FirebaseClient::auth (line 97) ... FAILED
[INFO] [stdout] test src/lib.rs - connector (line 46) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 12) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - FirebaseClient::reference (line 110) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:114:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_110_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_110_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 8 | let reference = client.reference("/");
[INFO] [stdout] 9 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - RealtimeReference::set (line 181) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:185:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_181_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_181_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 10| }))?;
[INFO] [stdout] 11+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/lib.rs:188:4
[INFO] [stdout]    |
[INFO] [stdout] 4  | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_181_0() {
[INFO] [stdout]    |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 10 | }))?;
[INFO] [stdout]    |    ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout] 4  ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_181_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5  | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 10 | }))?;
[INFO] [stdout] 11 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/connector.rs - connector::Connector::reconnect (line 53) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/connector.rs:57:67
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_connector_rs_53_0() {
[INFO] [stdout]   |                                      ---------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let connector = Connector::new("docs-example.firebaseio.com", 443)?;
[INFO] [stdout]   |                                                                   ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_connector_rs_53_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::connector::Connector;
[INFO] [stdout] ...
[INFO] [stdout] 8 | connector.reconnect()?;
[INFO] [stdout] 9 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/connector.rs:58:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_connector_rs_53_0() {
[INFO] [stdout]   |                                      ---------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 8 | connector.reconnect()?;
[INFO] [stdout]   |                      ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_connector_rs_53_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::connector::Connector;
[INFO] [stdout] ...
[INFO] [stdout] 8 | connector.reconnect()?;
[INFO] [stdout] 9 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - RealtimeReference::delete (line 259) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:263:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_259_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_259_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 8 | client.reference("/").delete()?;
[INFO] [stdout] 9 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:264:31
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_259_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 8 | client.reference("/").delete()?;
[INFO] [stdout]   |                               ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_259_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 8 | client.reference("/").delete()?;
[INFO] [stdout] 9 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/connector.rs - connector::Connector::request (line 83) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/connector.rs:87:67
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_connector_rs_83_0() {
[INFO] [stdout]   |                                      ---------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let connector = Connector::new("docs-example.firebaseio.com", 443)?;
[INFO] [stdout]   |                                                                   ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_connector_rs_83_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::connector::{ Connector, Method };
[INFO] [stdout] ...
[INFO] [stdout] 8 | connector.request(Method::Get, "/", None, None)?;
[INFO] [stdout] 9 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/connector.rs:88:48
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_connector_rs_83_0() {
[INFO] [stdout]   |                                      ---------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 8 | connector.request(Method::Get, "/", None, None)?;
[INFO] [stdout]   |                                                ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_connector_rs_83_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::connector::{ Connector, Method };
[INFO] [stdout] ...
[INFO] [stdout] 8 | connector.request(Method::Get, "/", None, None)?;
[INFO] [stdout] 9 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - RealtimeReference::update (line 233) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:237:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_233_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_233_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 10| }))?;
[INFO] [stdout] 11+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/lib.rs:240:4
[INFO] [stdout]    |
[INFO] [stdout] 4  | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_233_0() {
[INFO] [stdout]    |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 10 | }))?;
[INFO] [stdout]    |    ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout] 4  ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_233_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5  | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 10 | }))?;
[INFO] [stdout] 11 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - FirebaseClient::new (line 60) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:64:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_60_0() {
[INFO] [stdout]   |                                      ---------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_60_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] 6 |  
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout] 8 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - RealtimeReference::on_snapshot (line 281) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:286:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_281_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 8 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_281_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 12| });
[INFO] [stdout] 13+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - RealtimeReference::child (line 141) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:145:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_141_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_141_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 9 | let child_reference = reference.child("child");
[INFO] [stdout] 10+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - RealtimeReference::get (line 155) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:160:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_155_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 8 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_155_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 9 | assert_eq!(client.reference("/").get::<Value>().is_ok(), true);
[INFO] [stdout] 10+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - RealtimeReference::set_unique (line 207) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:211:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_207_0() {
[INFO] [stdout]   |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_207_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 10| }))?;
[INFO] [stdout] 11+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/lib.rs:214:4
[INFO] [stdout]    |
[INFO] [stdout] 4  | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_207_0() {
[INFO] [stdout]    |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 10 | }))?;
[INFO] [stdout]    |    ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout] 4  ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_207_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5  | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 10 | }))?;
[INFO] [stdout] 11 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - FirebaseClient::auth (line 97) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:101:74
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_97_0() {
[INFO] [stdout]   |                                      ---------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let client = FirebaseClient::new("https://docs-examples.firebaseio.com/")?;
[INFO] [stdout]   |                                                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_97_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::FirebaseClient;
[INFO] [stdout] ...
[INFO] [stdout] 8 | client.auth("ID_TOKEN");
[INFO] [stdout] 9 +     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - connector (line 46) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Method`
[INFO] [stdout]  --> src/lib.rs:51:34
[INFO] [stdout]   |
[INFO] [stdout] 8 | let response = connector.request(Method::Get, "/", None, None)?;
[INFO] [stdout]   |                                  ^^^^^^ use of undeclared type `Method`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this enum
[INFO] [stdout]   |
[INFO] [stdout] 2 + use firerust::connector::Method;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:50:67
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_46_0() {
[INFO] [stdout]   |                                      ---------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 7 | let connector = Connector::new("docs-example.firebaseio.com", 443)?;
[INFO] [stdout]   |                                                                   ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_46_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::connector::Connector;
[INFO] [stdout] ...
[INFO] [stdout] 10| drop(connector);
[INFO] [stdout] 11+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:51:63
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_46_0() {
[INFO] [stdout]   |                                      ---------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 8 | let response = connector.request(Method::Get, "/", None, None)?;
[INFO] [stdout]   |                                                               ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_46_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use firerust::connector::Connector;
[INFO] [stdout] ...
[INFO] [stdout] 10| drop(connector);
[INFO] [stdout] 11+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 - (line 12) stdout ----
[INFO] [stdout] Test executable failed (exit status: 1).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] Error: GatewayTimeout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/connector.rs - connector::Connector::reconnect (line 53)
[INFO] [stdout]     src/connector.rs - connector::Connector::request (line 83)
[INFO] [stdout]     src/lib.rs - (line 12)
[INFO] [stdout]     src/lib.rs - FirebaseClient::auth (line 97)
[INFO] [stdout]     src/lib.rs - FirebaseClient::new (line 60)
[INFO] [stdout]     src/lib.rs - FirebaseClient::reference (line 110)
[INFO] [stdout]     src/lib.rs - RealtimeReference::child (line 141)
[INFO] [stdout]     src/lib.rs - RealtimeReference::delete (line 259)
[INFO] [stdout]     src/lib.rs - RealtimeReference::get (line 155)
[INFO] [stdout]     src/lib.rs - RealtimeReference::on_snapshot (line 281)
[INFO] [stdout]     src/lib.rs - RealtimeReference::set (line 181)
[INFO] [stdout]     src/lib.rs - RealtimeReference::set_unique (line 207)
[INFO] [stdout]     src/lib.rs - RealtimeReference::update (line 233)
[INFO] [stdout]     src/lib.rs - connector (line 46)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 14 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.79s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "8aadc59bfd269225735b0c9783253148aaf71687fbf0ac41df1be8f7a81ce9b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aadc59bfd269225735b0c9783253148aaf71687fbf0ac41df1be8f7a81ce9b2", kill_on_drop: false }`
[INFO] [stdout] 8aadc59bfd269225735b0c9783253148aaf71687fbf0ac41df1be8f7a81ce9b2