[INFO] fetching crate math-engine 0.2.0...
[INFO] testing math-engine-0.2.0 against master#0d162b25edd5bf0dba9a22e83b614f1113e90474 for pr-150681
[INFO] extracting crate math-engine 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate math-engine 0.2.0
[INFO] finished tweaking crates.io crate math-engine 0.2.0
[INFO] tweaked toml for crates.io crate math-engine 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate math-engine 0.2.0 on toolchain 0d162b25edd5bf0dba9a22e83b614f1113e90474
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate math-engine 0.2.0 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" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byteorder v1.4.3
[INFO] [stderr]   Downloaded unicode-ident v1.0.9
[INFO] [stderr]   Downloaded lexgen_util v0.14.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.63
[INFO] [stderr]   Downloaded pomelo-impl v0.1.5
[INFO] [stderr]   Downloaded quote v1.0.29
[INFO] [stderr]   Downloaded lexgen v0.14.0
[INFO] [stderr]   Downloaded pomelo v0.1.5
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fff1cf92c2a1a65e256567936b4c64410d3bfefed702d7039ef75986ffbfe71a
[INFO] running `Command { std: "docker" "start" "-a" "fff1cf92c2a1a65e256567936b4c64410d3bfefed702d7039ef75986ffbfe71a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fff1cf92c2a1a65e256567936b4c64410d3bfefed702d7039ef75986ffbfe71a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fff1cf92c2a1a65e256567936b4c64410d3bfefed702d7039ef75986ffbfe71a", kill_on_drop: false }`
[INFO] [stdout] fff1cf92c2a1a65e256567936b4c64410d3bfefed702d7039ef75986ffbfe71a
[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=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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3f31238b4ee5f9e4c7acc791d1dbc8a823e662f21069d43c829a23643bb1fe5
[INFO] running `Command { std: "docker" "start" "-a" "c3f31238b4ee5f9e4c7acc791d1dbc8a823e662f21069d43c829a23643bb1fe5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling lexgen_util v0.14.0
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling pomelo-impl v0.1.5
[INFO] [stderr]    Compiling lexgen v0.14.0
[INFO] [stderr]    Compiling pomelo v0.1.5
[INFO] [stderr]    Compiling math-engine v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.56s
[INFO] running `Command { std: "docker" "inspect" "c3f31238b4ee5f9e4c7acc791d1dbc8a823e662f21069d43c829a23643bb1fe5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3f31238b4ee5f9e4c7acc791d1dbc8a823e662f21069d43c829a23643bb1fe5", kill_on_drop: false }`
[INFO] [stdout] c3f31238b4ee5f9e4c7acc791d1dbc8a823e662f21069d43c829a23643bb1fe5
[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=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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06d160a66ce3154b7d14761ee5a18b96b76fa7d98b599daf6e8cb889ddd1e756
[INFO] running `Command { std: "docker" "start" "-a" "06d160a66ce3154b7d14761ee5a18b96b76fa7d98b599daf6e8cb889ddd1e756", kill_on_drop: false }`
[INFO] [stderr]    Compiling math-engine v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "06d160a66ce3154b7d14761ee5a18b96b76fa7d98b599daf6e8cb889ddd1e756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06d160a66ce3154b7d14761ee5a18b96b76fa7d98b599daf6e8cb889ddd1e756", kill_on_drop: false }`
[INFO] [stdout] 06d160a66ce3154b7d14761ee5a18b96b76fa7d98b599daf6e8cb889ddd1e756
[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=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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5448f7b96e46b57e88d118e6cfc993fe69aa7d1429765e6288abe9dc75f520a6
[INFO] running `Command { std: "docker" "start" "-a" "5448f7b96e46b57e88d118e6cfc993fe69aa7d1429765e6288abe9dc75f520a6", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/math_engine-34a2e3113d264ae1)
[INFO] [stderr]      Running unittests src/bin/main.rs (/opt/rustwide/target/debug/deps/main-4ed43afabcd7b47a)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests math_engine
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::parser ... ok
[INFO] [stdout] test tests::parser_variable ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test src/expression.rs - expression::Expression::derivative (line 306) ... FAILED
[INFO] [stdout] test src/expression.rs - expression::Expression::constant_propagation (line 353) ... FAILED
[INFO] [stdout] test src/expression.rs - expression::Expression::constant (line 79) ... ok
[INFO] [stdout] test src/expression.rs - expression::Expression::eval_with_context (line 273) ... ok
[INFO] [stdout] test src/expression.rs - expression::Expression::addition (line 120) ... ok
[INFO] [stdout] test src/expression.rs - expression::Expression::eval (line 233) ... ok
[INFO] [stdout] test src/context.rs - context::Context::with_variable (line 27) ... ok
[INFO] [stdout] test src/context.rs - context::Context::add_variable (line 42) ... ok
[INFO] [stdout] test src/expression.rs - expression::Expression::division (line 180) ... ok
[INFO] [stdout] test src/lib.rs - (line 21) ... FAILED
[INFO] [stdout] test src/expression.rs - expression::Expression::parse (line 61) ... ok
[INFO] [stdout] test src/expression.rs - expression::Expression::subtraction (line 140) ... ok
[INFO] [stdout] test src/expression.rs - expression::Expression::product (line 160) ... ok
[INFO] [stdout] test src/parser.rs - parser::parse_expression (line 62) ... ok
[INFO] [stdout] test src/lib.rs - (line 31) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 11) ... FAILED
[INFO] [stdout] test src/expression.rs - expression::Expression::variable (line 96) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/expression.rs - expression::Expression::derivative (line 306) stdout ----
[INFO] [stdout] error[E0599]: no method named `derivative` found for enum `Result<T, E>` in the current scope
[INFO] [stdout]    --> src/expression.rs:315:17
[INFO] [stdout]     |
[INFO] [stdout] 315 | let deri = expr.derivative("x");
[INFO] [stdout]     |                 ^^^^^^^^^^ method not found in `Result<Expression, math_engine::error::ParserError>`
[INFO] [stdout]     |
[INFO] [stdout] note: the method `derivative` exists on the type `Expression`
[INFO] [stdout]    --> src/expression.rs:316:5
[INFO] [stdout]     |
[INFO] [stdout] 316 |     pub fn derivative(&self, deriv_var: &str) -> Self {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: consider using `Result::expect` to unwrap the `Expression` value, panicking if the value is a `Result::Err`
[INFO] [stdout]     |
[INFO] [stdout] 315 | let deri = expr.expect("REASON").derivative("x");
[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 E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/expression.rs - expression::Expression::constant_propagation (line 353) stdout ----
[INFO] [stdout] error: expected `;`, found `}`
[INFO] [stdout]    --> src/expression.rs:360:48
[INFO] [stdout]     |
[INFO] [stdout] 360 | let simp = expr.constant_propagation().unwrap()
[INFO] [stdout]     |                                                ^ help: add `;` here
[INFO] [stdout] 361 | } _doctest_main_src_expression_rs_353_0() }
[INFO] [stdout]     | - unexpected token
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 21) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Expression`
[INFO] [stdout]   --> src/lib.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 | let e1 = Expression::constant(3.0);
[INFO] [stdout]    |          ^^^^^^^^^^ use of undeclared type `Expression`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this enum
[INFO] [stdout]    |
[INFO] [stdout] 21 + use math_engine::expression::Expression;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Expression`
[INFO] [stdout]   --> src/lib.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 23 | let e2 = Expression::variable("x");
[INFO] [stdout]    |          ^^^^^^^^^^ use of undeclared type `Expression`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this enum
[INFO] [stdout]    |
[INFO] [stdout] 21 + use math_engine::expression::Expression;
[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 E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 31) stdout ----
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Expression` in this scope
[INFO] [stdout]   --> src/lib.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | let e1 = Expression("1.0 * y + 2.0 * x").unwrap();
[INFO] [stdout]    |          ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 11) stdout ----
[INFO] [stdout] error: path separator must be a double colon
[INFO] [stdout]   --> src/lib.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 | let ctx = Context:new().with_variable("x", 3.0);
[INFO] [stdout]    |                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: use a double colon instead
[INFO] [stdout]    |
[INFO] [stdout] 13 | let ctx = Context::new().with_variable("x", 3.0);
[INFO] [stdout]    |                   +
[INFO] [stdout] 
[INFO] [stdout] error: format argument must be a string literal
[INFO] [stdout]   --> src/lib.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 | assert!(eval, 4.0);
[INFO] [stdout]    |               ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: you might be missing a string literal to format with
[INFO] [stdout]    |
[INFO] [stdout] 17 | assert!(eval, "{}", 4.0);
[INFO] [stdout]    |               +++++
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Expression`
[INFO] [stdout]   --> src/lib.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | let expr = Expression::parse("1.0 + 3.0 * (4.0 - x)").unwrap();
[INFO] [stdout]    |            ^^^^^^^^^^ use of undeclared type `Expression`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this enum
[INFO] [stdout]    |
[INFO] [stdout] 11 + use math_engine::expression::Expression;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Context`
[INFO] [stdout]   --> src/lib.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 13 | let ctx = Context:new().with_variable("x", 3.0);
[INFO] [stdout]    |           ^^^^^^^ use of undeclared type `Context`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these structs
[INFO] [stdout]    |
[INFO] [stdout] 11 + use std::task::Context;
[INFO] [stdout]    |
[INFO] [stdout] 11 + use math_engine::context::Context;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/expression.rs - expression::Expression::constant_propagation (line 353)
[INFO] [stdout]     src/expression.rs - expression::Expression::derivative (line 306)
[INFO] [stdout]     src/lib.rs - (line 11)
[INFO] [stdout]     src/lib.rs - (line 21)
[INFO] [stdout]     src/lib.rs - (line 31)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 12 passed; 5 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.41s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "5448f7b96e46b57e88d118e6cfc993fe69aa7d1429765e6288abe9dc75f520a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5448f7b96e46b57e88d118e6cfc993fe69aa7d1429765e6288abe9dc75f520a6", kill_on_drop: false }`
[INFO] [stdout] 5448f7b96e46b57e88d118e6cfc993fe69aa7d1429765e6288abe9dc75f520a6
