[INFO] fetching crate symbolics_core 0.1.5...
[INFO] testing symbolics_core-0.1.5 against 1.49.0 for beta-1.50-1
[INFO] extracting crate symbolics_core 0.1.5 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate symbolics_core 0.1.5 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 symbolics_core 0.1.5
[INFO] finished tweaking crates.io crate symbolics_core 0.1.5
[INFO] tweaked toml for crates.io crate symbolics_core 0.1.5 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a455dc963aad8c3d6f11124621d0ba983f047073d68676593196fa37244c79a
[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" "2a455dc963aad8c3d6f11124621d0ba983f047073d68676593196fa37244c79a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a455dc963aad8c3d6f11124621d0ba983f047073d68676593196fa37244c79a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a455dc963aad8c3d6f11124621d0ba983f047073d68676593196fa37244c79a", kill_on_drop: false }`
[INFO] [stdout] 2a455dc963aad8c3d6f11124621d0ba983f047073d68676593196fa37244c79a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", 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] 2c975eaa55199d97f252f35a429b0f785f63554e711bdb8cb3b71f68e38d4002
[INFO] running `Command { std: "docker" "start" "-a" "2c975eaa55199d97f252f35a429b0f785f63554e711bdb8cb3b71f68e38d4002", kill_on_drop: false }`
[INFO] [stderr]    Compiling symbolics_core v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "2c975eaa55199d97f252f35a429b0f785f63554e711bdb8cb3b71f68e38d4002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c975eaa55199d97f252f35a429b0f785f63554e711bdb8cb3b71f68e38d4002", kill_on_drop: false }`
[INFO] [stdout] 2c975eaa55199d97f252f35a429b0f785f63554e711bdb8cb3b71f68e38d4002
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", 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] 7855af91843b8f64fa555291256f3331017b48cc03213ef736aa62855887e523
[INFO] running `Command { std: "docker" "start" "-a" "7855af91843b8f64fa555291256f3331017b48cc03213ef736aa62855887e523", kill_on_drop: false }`
[INFO] [stderr]    Compiling symbolics_core v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]  --> tests/building.rs:9:117
[INFO] [stdout]   |
[INFO] [stdout] 9 |     "Add(Add(Mul(Symbol(\"a\"), Pow(Symbol(\"x\"), Num(2.0))), Mul(Symbol(\"b\"), Symbol(\"x\"))), Symbol(\"c\"))");;
[INFO] [stdout]   |                                                                                                                     ^ help: remove this semicolon
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "7855af91843b8f64fa555291256f3331017b48cc03213ef736aa62855887e523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7855af91843b8f64fa555291256f3331017b48cc03213ef736aa62855887e523", kill_on_drop: false }`
[INFO] [stdout] 7855af91843b8f64fa555291256f3331017b48cc03213ef736aa62855887e523
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 73c3d8de51e4a2abd8470057ba38ffb4b86909aa5c6c594eae03fabc25598c65
[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" "73c3d8de51e4a2abd8470057ba38ffb4b86909aa5c6c594eae03fabc25598c65", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stdout] running 19 tests
[INFO] [stderr]  --> tests/building.rs:9:117
[INFO] [stdout] test expr::apply::batch ... ok
[INFO] [stderr]   |
[INFO] [stdout] test expr::overloads::add::expr_f64 ... ok
[INFO] [stderr] 9 |     "Add(Add(Mul(Symbol(\"a\"), Pow(Symbol(\"x\"), Num(2.0))), Mul(Symbol(\"b\"), Symbol(\"x\"))), Symbol(\"c\"))");;
[INFO] [stdout] test expr::overloads::add::f64_expr ... ok
[INFO] [stderr]   |                                                                                                                     ^ help: remove this semicolon
[INFO] [stdout] test expr::overloads::div::expr_expr ... ok
[INFO] [stderr]   |
[INFO] [stdout] test expr::overloads::div::expr_f64 ... ok
[INFO] [stderr]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] test expr::overloads::div::f64_expr ... ok
[INFO] [stderr] 
[INFO] [stdout] test expr::overloads::mul::expr_expr ... ok
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stdout] test expr::overloads::mul::expr_f64 ... ok
[INFO] [stderr] 
[INFO] [stdout] test expr::overloads::neg::expr ... ok
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] test expr::overloads::mul::f64_expr ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/symbolics_core-54af140304c559c3
[INFO] [stdout] test expr::overloads::pow::expr_expr ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/building-806f045523978783
[INFO] [stdout] test expr::overloads::pow::expr_f64 ... ok
[INFO] [stdout] test expr::overloads::pow::f64_expr ... ok
[INFO] [stdout] test expr::overloads::sub::expr_expr ... ok
[INFO] [stdout] test expr::overloads::sub::expr_f64 ... ok
[INFO] [stdout] test expr::overloads::sub::f64_expr ... ok
[INFO] [stdout] test expr::apply::one ... ok
[INFO] [stdout] test expr::apply::expr ... ok
[INFO] [stdout] test expr::overloads::add::expr_expr ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test exponential_nref ... ok
[INFO] [stderr]    Doc-tests symbolics_core
[INFO] [stdout] test quadratic_s ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/expr/apply.rs - expr::apply::Expr::apply1 (line 27) ... ok
[INFO] [stdout] test src/macros.rs - apply (line 23) ... ok
[INFO] [stdout] test src/macros.rs - s (line 6) ... ok
[INFO] [stdout] test src/macros.rs - apply (line 32) ... ok
[INFO] [stdout] test src/expr/apply.rs - expr::apply::Expr::apply1 (line 37) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "73c3d8de51e4a2abd8470057ba38ffb4b86909aa5c6c594eae03fabc25598c65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73c3d8de51e4a2abd8470057ba38ffb4b86909aa5c6c594eae03fabc25598c65", kill_on_drop: false }`
[INFO] [stdout] 73c3d8de51e4a2abd8470057ba38ffb4b86909aa5c6c594eae03fabc25598c65