[INFO] fetching crate math_test 1.0.0...
[INFO] testing math_test-1.0.0 against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] extracting crate math_test 1.0.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate math_test 1.0.0
[INFO] finished tweaking crates.io crate math_test 1.0.0
[INFO] tweaked toml for crates.io crate math_test 1.0.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate math_test 1.0.0 on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate math_test 1.0.0 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" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]    Compiling math_test v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Equation` is never used
[INFO] [stdout]  --> src/equation/mod.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait Equation: Question {
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OneVariable` is never constructed
[INFO] [stdout]   --> src/equation/onevariable/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct OneVariable {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TwoVariables` is never constructed
[INFO] [stdout]   --> src/equation/twovariables/mod.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct TwoVariables {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Operation` is never constructed
[INFO] [stdout]   --> src/operation/mod.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Operation {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `choose_variable` is never used
[INFO] [stdout]   --> src/operation/mod.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Operation {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 18 |     fn choose_variable(min: i32, max: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `panic` is never used
[INFO] [stdout]    --> src/operation/mod.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl Operation {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 137 |     pub fn panic(&self, e: &str) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `get_correct_answer`, `calculate`, `read_answer_from_cmd`, and `verify_answer` are never used
[INFO] [stdout]   --> src/question.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub trait Question: Display {
[INFO] [stdout]    |           -------- associated items in this trait
[INFO] [stdout] ...
[INFO] [stdout] 10 |     fn get_correct_answer(&self) -> Self::Output;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 11 |     fn calculate(&self) -> Self::Output;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 12 |     fn post_to_cmd(&self) -> bool;
[INFO] [stdout] 13 |     fn read_answer_from_cmd() -> Self::Output;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 14 |     fn correct_answer_to_string(&self) -> String;
[INFO] [stdout] 15 |     fn verify_answer(correct_answer: Self::Output, answer: Self::Output) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.65s
[INFO] running `Command { std: "docker" "inspect" "947771d6958ed0e6410be53fa0310c5e2f282be05f2a176de35971968998a8b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "947771d6958ed0e6410be53fa0310c5e2f282be05f2a176de35971968998a8b9", kill_on_drop: false }`
[INFO] [stdout] 947771d6958ed0e6410be53fa0310c5e2f282be05f2a176de35971968998a8b9
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd3442ac412dd6bf2b4f512c25a169835eca17ed875257e34da4b40113e0b0f2
[INFO] running `Command { std: "docker" "start" "-a" "fd3442ac412dd6bf2b4f512c25a169835eca17ed875257e34da4b40113e0b0f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling math_test v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Equation` is never used
[INFO] [stdout]  --> src/equation/mod.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait Equation: Question {
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OneVariable` is never constructed
[INFO] [stdout]   --> src/equation/onevariable/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct OneVariable {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TwoVariables` is never constructed
[INFO] [stdout]   --> src/equation/twovariables/mod.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct TwoVariables {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Operation` is never constructed
[INFO] [stdout]   --> src/operation/mod.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Operation {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `choose_variable` is never used
[INFO] [stdout]   --> src/operation/mod.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Operation {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 18 |     fn choose_variable(min: i32, max: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `panic` is never used
[INFO] [stdout]    --> src/operation/mod.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl Operation {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 137 |     pub fn panic(&self, e: &str) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `get_correct_answer`, `calculate`, `read_answer_from_cmd`, and `verify_answer` are never used
[INFO] [stdout]   --> src/question.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub trait Question: Display {
[INFO] [stdout]    |           -------- associated items in this trait
[INFO] [stdout] ...
[INFO] [stdout] 10 |     fn get_correct_answer(&self) -> Self::Output;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 11 |     fn calculate(&self) -> Self::Output;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 12 |     fn post_to_cmd(&self) -> bool;
[INFO] [stdout] 13 |     fn read_answer_from_cmd() -> Self::Output;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 14 |     fn correct_answer_to_string(&self) -> String;
[INFO] [stdout] 15 |     fn verify_answer(correct_answer: Self::Output, answer: Self::Output) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "fd3442ac412dd6bf2b4f512c25a169835eca17ed875257e34da4b40113e0b0f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd3442ac412dd6bf2b4f512c25a169835eca17ed875257e34da4b40113e0b0f2", kill_on_drop: false }`
[INFO] [stdout] fd3442ac412dd6bf2b4f512c25a169835eca17ed875257e34da4b40113e0b0f2
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 45248d32f766e8cdd86be98278420a94b5294f7f5c33e42057fe63f79eb46416
[INFO] running `Command { std: "docker" "start" "-a" "45248d32f766e8cdd86be98278420a94b5294f7f5c33e42057fe63f79eb46416", kill_on_drop: false }`
[INFO] [stderr] warning: trait `Equation` is never used
[INFO] [stderr]  --> src/equation/mod.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub trait Equation: Question {
[INFO] [stderr]   |           ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `OneVariable` is never constructed
[INFO] [stderr]   --> src/equation/onevariable/mod.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub struct OneVariable {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TwoVariables` is never constructed
[INFO] [stderr]   --> src/equation/twovariables/mod.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct TwoVariables {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Operation` is never constructed
[INFO] [stderr]   --> src/operation/mod.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Operation {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `choose_variable` is never used
[INFO] [stderr]   --> src/operation/mod.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | impl Operation {
[INFO] [stderr]    | -------------- associated function in this implementation
[INFO] [stderr] 18 |     fn choose_variable(min: i32, max: i32) -> i32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `panic` is never used
[INFO] [stderr]    --> src/operation/mod.rs:137:12
[INFO] [stderr]     |
[INFO] [stderr] 136 | impl Operation {
[INFO] [stderr]     | -------------- method in this implementation
[INFO] [stderr] 137 |     pub fn panic(&self, e: &str) {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `get_correct_answer`, `calculate`, `read_answer_from_cmd`, and `verify_answer` are never used
[INFO] [stderr]   --> src/question.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr]  6 | pub trait Question: Display {
[INFO] [stderr]    |           -------- associated items in this trait
[INFO] [stderr] ...
[INFO] [stderr] 10 |     fn get_correct_answer(&self) -> Self::Output;
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 11 |     fn calculate(&self) -> Self::Output;
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 12 |     fn post_to_cmd(&self) -> bool;
[INFO] [stderr] 13 |     fn read_answer_from_cmd() -> Self::Output;
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 14 |     fn correct_answer_to_string(&self) -> String;
[INFO] [stderr] 15 |     fn verify_answer(correct_answer: Self::Output, answer: Self::Output) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `math_test` (bin "math_test") generated 7 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/math_test-084b15cc407a9a0f)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test equation::onevariable::tests::test_onevariable ... ok
[INFO] [stdout] test exam::tests::test_exam ... ok
[INFO] [stdout] test operation::tests::test_operation ... ok
[INFO] [stdout] test question_type::tests::test_display_methods ... ok
[INFO] [stdout] test question_type::tests::test_get_question_type ... ok
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/math_test-bccfe702784b1f08)
[INFO] [stdout] test equation::twovariables::tests::test_twovariables ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test equation::twovariables::tests::test_twovariables ... ok
[INFO] [stdout] test question_type::tests::test_get_question_type ... ok
[INFO] [stdout] test equation::onevariable::tests::test_onevariable ... ok
[INFO] [stdout] test question_type::tests::test_display_methods ... ok
[INFO] [stdout] test operation::tests::test_operation ... ok
[INFO] [stdout] test exam::tests::test_exam ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/integration_test.rs (/opt/rustwide/target/debug/deps/integration_test-47444774df564182)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::generate_addition_exam_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "45248d32f766e8cdd86be98278420a94b5294f7f5c33e42057fe63f79eb46416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45248d32f766e8cdd86be98278420a94b5294f7f5c33e42057fe63f79eb46416", kill_on_drop: false }`
[INFO] [stdout] 45248d32f766e8cdd86be98278420a94b5294f7f5c33e42057fe63f79eb46416
