[INFO] fetching crate xlformula_engine 0.1.8...
[INFO] testing xlformula_engine-0.1.8 against 1.49.0 for beta-1.50-1
[INFO] extracting crate xlformula_engine 0.1.8 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate xlformula_engine 0.1.8 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xlformula_engine 0.1.8
[INFO] finished tweaking crates.io crate xlformula_engine 0.1.8
[INFO] tweaked toml for crates.io crate xlformula_engine 0.1.8 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate xlformula_engine 0.1.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 91b2e0c9f653a8e307fc686c149d87031fce73b30e97807b9c1768017015e656
[INFO] running `Command { std: "docker" "start" "-a" "91b2e0c9f653a8e307fc686c149d87031fce73b30e97807b9c1768017015e656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91b2e0c9f653a8e307fc686c149d87031fce73b30e97807b9c1768017015e656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91b2e0c9f653a8e307fc686c149d87031fce73b30e97807b9c1768017015e656", kill_on_drop: false }`
[INFO] [stdout] 91b2e0c9f653a8e307fc686c149d87031fce73b30e97807b9c1768017015e656
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d19c2dbb4079a24a1dc4d33340954b285ba2bc9a0744d1e1676d2e44723a68a7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d19c2dbb4079a24a1dc4d33340954b285ba2bc9a0744d1e1676d2e44723a68a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling ucd-trie v0.1.2
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling assert_approx_eq v1.1.0
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling pest_generator v2.1.2
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling xlformula_engine v0.1.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.61s
[INFO] running `Command { std: "docker" "inspect" "d19c2dbb4079a24a1dc4d33340954b285ba2bc9a0744d1e1676d2e44723a68a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d19c2dbb4079a24a1dc4d33340954b285ba2bc9a0744d1e1676d2e44723a68a7", kill_on_drop: false }`
[INFO] [stdout] d19c2dbb4079a24a1dc4d33340954b285ba2bc9a0744d1e1676d2e44723a68a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49389459f46086b377851a817f2d382870f21e82ba111d09a1e394719715a87d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "49389459f46086b377851a817f2d382870f21e82ba111d09a1e394719715a87d", kill_on_drop: false }`
[INFO] [stderr]    Compiling xlformula_engine v0.1.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.61s
[INFO] running `Command { std: "docker" "inspect" "49389459f46086b377851a817f2d382870f21e82ba111d09a1e394719715a87d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49389459f46086b377851a817f2d382870f21e82ba111d09a1e394719715a87d", kill_on_drop: false }`
[INFO] [stdout] 49389459f46086b377851a817f2d382870f21e82ba111d09a1e394719715a87d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] da4c6e1e6a70b2a96572bc3f7769003fa51061d5644ae50f7b4f2163880c27df
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "da4c6e1e6a70b2a96572bc3f7769003fa51061d5644ae50f7b4f2163880c27df", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/xlformula_engine-00fc55fe9dfe3934
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/xlformula_engine-a39a0f8e18514422
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/test-4a6ffdbc4dd90a98
[INFO] [stdout] 
[INFO] [stdout] running 68 tests
[INFO] [stdout] test it_evaluate_add_operator_simple_addition ... ok
[INFO] [stdout] test it_evaluate_add_operator_spaces_before_number ... ok
[INFO] [stdout] test it_evaluate_concat_operator_with_casting ... ok
[INFO] [stdout] test it_evaluate_boolean_or ... ok
[INFO] [stdout] test it_evaluate_add_operator_with_large_numbers ... ok
[INFO] [stdout] test it_evaluate_add_operator_with_negative_numbers ... ok
[INFO] [stdout] test it_evaluate_comparison_operators ... ok
[INFO] [stdout] test it_evaluate_concat_operator1 ... ok
[INFO] [stdout] test it_evaluate_boolean_not ... ok
[INFO] [stdout] test it_evaluate_boolean_xor ... ok
[INFO] [stdout] test it_evaluate_add_operator_spaces_between_operators ... ok
[INFO] [stdout] test it_evaluate_concat_operator_with_numberic ... ok
[INFO] [stdout] test it_evaluate_constant_text_with_quotes ... ok
[INFO] [stdout] test it_evaluate_concat_operator3 ... ok
[INFO] [stdout] test it_evaluate_functions_with_casting ... ok
[INFO] [stdout] test it_evaluate_functions_sum ... ok
[INFO] [stdout] test it_evaluate_boolean_and ... ok
[INFO] [stdout] test it_evaluate_concat_operator_with_casting2 ... ok
[INFO] [stdout] test it_evaluate_functions_avg ... ok
[INFO] [stdout] test it_evaluate_divide_operator ... ok
[INFO] [stdout] test it_evaluate_divide_operator_divsion_by_zero ... ok
[INFO] [stdout] test it_evaluate_float ... ok
[INFO] [stdout] test it_evaluate_functions_product ... ok
[INFO] [stdout] test it_evaluate_date ... ok
[INFO] [stdout] test it_evaluate_constant_number ... ok
[INFO] [stdout] test it_evaluate_constant_number_float ... ok
[INFO] [stdout] test it_evaluate_minus_operator_with_negative_numbers ... ok
[INFO] [stdout] test it_evaluate_constant_starting_with_equal ... ok
[INFO] [stdout] test it_evaluate_constant_text ... ok
[INFO] [stdout] test it_evaluate_iterators_and_scalars ... ok
[INFO] [stdout] test it_evaluate_multiple_iterators_and_scalars ... ok
[INFO] [stdout] test it_evaluate_iterator_in_logic_functions ... ok
[INFO] [stdout] test it_evaluate_minus_operator1 ... ok
[INFO] [stdout] test it_evaluate_multiple_operations ... ok
[INFO] [stdout] test it_evaluate_multiple_operations_in_right_order2 ... ok
[INFO] [stdout] test it_evaluate_multiple_operations2 ... ok
[INFO] [stdout] test it_evaluate_multiple_operations_with_errors ... ok
[INFO] [stdout] test it_evaluate_multiple_operations_in_right_order ... ok
[INFO] [stdout] test it_evaluate_negative_float ... ok
[INFO] [stdout] test it_evaluate_iterator_with_diffrent_number_of_entries ... ok
[INFO] [stdout] test it_evaluate_nested_parens ... ok
[INFO] [stdout] test it_evaluate_operators_with_casting ... ok
[INFO] [stdout] test it_evaluate_multiply_operator ... ok
[INFO] [stdout] test it_evaluate_negative ... ok
[INFO] [stdout] test it_evaluate_parens ... ok
[INFO] [stdout] test it_evaluate_iterators ... ok
[INFO] [stdout] test it_evaluate_power_int ... ok
[INFO] [stdout] test it_evaluate_references ... ok
[INFO] [stdout] test it_evaluate_references_boolean_formulas ... ok
[INFO] [stdout] test it_evaluate_references_error_value_formulas ... ok
[INFO] [stdout] test it_evaluate_references_other_formulas ... ok
[INFO] [stdout] test it_evaluate_strings_in_numeric_operator2 ... ok
[INFO] [stdout] test it_evaluate_strings_with_quotes2 ... ok
[INFO] [stdout] test it_evaluate_wrong_parens1 ... ok
[INFO] [stdout] test it_evaluate_iterator_operators ... ok
[INFO] [stdout] test it_support_basic_math_function ... ok
[INFO] [stdout] test it_evaluate_strings_with_quoted_quotes1 ... ok
[INFO] [stdout] test it_evaluate_strings ... ok
[INFO] [stdout] test it_evaluate_power_float ... ok
[INFO] [stdout] test it_support_basic_math_function_with_nested_formulas ... ok
[INFO] [stdout] test it_evaluate_strings_in_numeric_operator ... ok
[INFO] [stdout] test it_evaluate_references_with_dot ... ok
[INFO] [stdout] test it_evaluate_references_iterator ... ok
[INFO] [stdout] test it_evaluate_strings_with_single_quotes ... ok
[INFO] [stdout] test it_support_basic_math_function_with_nested_functions ... ok
[INFO] [stdout] test it_evaluate_strings_with_quoted_quotes ... ok
[INFO] [stdout] test it_evaluate_strings_with_quotes ... ok
[INFO] [stderr]    Doc-tests xlformula_engine
[INFO] [stdout] test it_evaluate_multiple_parens ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 68 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test src/lib.rs - (line 25) ... ok
[INFO] [stdout] test src/lib.rs - (line 163) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 53) ... ok
[INFO] [stdout] test src/lib.rs - (line 70) ... ok
[INFO] [stdout] test src/lib.rs - (line 86) ... ok
[INFO] [stdout] test src/lib.rs - (line 143) ... ok
[INFO] [stdout] test src/lib.rs - (line 106) ... ok
[INFO] [stdout] test src/lib.rs - (line 32) ... ok
[INFO] [stdout] test src/lib.rs - (line 126) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 163) stdout ----
[INFO] [stdout] error[E0412]: cannot find type `DateTime` in this scope
[INFO] [stdout]  --> src/lib.rs:170:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | let start: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-03-01T02:00:00.000Z")?;
[INFO] [stdout]   |            ^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chrono::DateTime;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::DateTime;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `FixedOffset` in this scope
[INFO] [stdout]  --> src/lib.rs:170:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | let start: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-03-01T02:00:00.000Z")?;
[INFO] [stdout]   |                     ^^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chrono::FixedOffset;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::FixedOffset;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `DateTime`
[INFO] [stdout]  --> src/lib.rs:170:36
[INFO] [stdout]   |
[INFO] [stdout] 8 | let start: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-03-01T02:00:00.000Z")?;
[INFO] [stdout]   |                                    ^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chrono::DateTime;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::DateTime;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `DateTime` in this scope
[INFO] [stdout]  --> src/lib.rs:171:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | let end: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-08-30T02:00:00.000Z")?;
[INFO] [stdout]   |          ^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chrono::DateTime;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::DateTime;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `FixedOffset` in this scope
[INFO] [stdout]  --> src/lib.rs:171:19
[INFO] [stdout]   |
[INFO] [stdout] 9 | let end: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-08-30T02:00:00.000Z")?;
[INFO] [stdout]   |                   ^^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chrono::FixedOffset;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::FixedOffset;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `DateTime`
[INFO] [stdout]  --> src/lib.rs:171:34
[INFO] [stdout]   |
[INFO] [stdout] 9 | let end: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-08-30T02:00:00.000Z")?;
[INFO] [stdout]   |                                  ^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chrono::DateTime;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::DateTime;
[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 `Try`)
[INFO] [stdout]   --> src/lib.rs:170:36
[INFO] [stdout]    |
[INFO] [stdout] 7  | / fn main() {
[INFO] [stdout] 8  | | let start: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-03-01T02:00:00.000Z")?;
[INFO] [stdout]    | |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 9  | | let end: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-08-30T02:00:00.000Z")?;
[INFO] [stdout] 10 | | let data_function = |s: String| match s.as_str() {
[INFO] [stdout] ...  |
[INFO] [stdout] 26 | | println!("Result is {}", calculate::result_to_string(result));
[INFO] [stdout] 27 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_error`
[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 `Try`)
[INFO] [stdout]   --> src/lib.rs:171:34
[INFO] [stdout]    |
[INFO] [stdout] 7  | / fn main() {
[INFO] [stdout] 8  | | let start: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-03-01T02:00:00.000Z")?;
[INFO] [stdout] 9  | | let end: DateTime<FixedOffset> = DateTime::parse_from_rfc3339("2019-08-30T02:00:00.000Z")?;
[INFO] [stdout]    | |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 10 | | let data_function = |s: String| match s.as_str() {
[INFO] [stdout] ...  |
[INFO] [stdout] 26 | | println!("Result is {}", calculate::result_to_string(result));
[INFO] [stdout] 27 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0412, 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 163)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 8 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "da4c6e1e6a70b2a96572bc3f7769003fa51061d5644ae50f7b4f2163880c27df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da4c6e1e6a70b2a96572bc3f7769003fa51061d5644ae50f7b4f2163880c27df", kill_on_drop: false }`
[INFO] [stdout] da4c6e1e6a70b2a96572bc3f7769003fa51061d5644ae50f7b4f2163880c27df