[INFO] cloning repository https://github.com/alexsednz/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexsednz/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexsednz%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexsednz%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 731fad993184a4cec7aa96e7eebbce8cf5e206ff
[INFO] testing alexsednz/learn-rust against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexsednz%2Flearn-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexsednz/learn-rust on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alexsednz/learn-rust
[INFO] finished tweaking git repo https://github.com/alexsednz/learn-rust
[INFO] tweaked toml for git repo https://github.com/alexsednz/learn-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/alexsednz/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f78f0843f555d47ca73630f7f9c2231cd185c1519572852cef6d2b28dbfb1f99
[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" "f78f0843f555d47ca73630f7f9c2231cd185c1519572852cef6d2b28dbfb1f99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f78f0843f555d47ca73630f7f9c2231cd185c1519572852cef6d2b28dbfb1f99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f78f0843f555d47ca73630f7f9c2231cd185c1519572852cef6d2b28dbfb1f99", kill_on_drop: false }`
[INFO] [stdout] f78f0843f555d47ca73630f7f9c2231cd185c1519572852cef6d2b28dbfb1f99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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] 924b0be8cdf22a07025d7c02bc606121e6da807f12c6ababe6277f022c55dbcc
[INFO] running `Command { std: "docker" "start" "-a" "924b0be8cdf22a07025d7c02bc606121e6da807f12c6ababe6277f022c55dbcc", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling learn-general-rust v0.1.0 (/opt/rustwide/workdir/learn-general-rust)
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stdout] warning: field is never read: `m1`
[INFO] [stdout]   --> learn-general-rust/src/look_ahead.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     m1: BM1,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `m2`
[INFO] [stdout]   --> learn-general-rust/src/look_ahead.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     m2: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling learn-proc-macro v0.1.0 (/opt/rustwide/workdir/learn-proc-macro)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.71s
[INFO] running `Command { std: "docker" "inspect" "924b0be8cdf22a07025d7c02bc606121e6da807f12c6ababe6277f022c55dbcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "924b0be8cdf22a07025d7c02bc606121e6da807f12c6ababe6277f022c55dbcc", kill_on_drop: false }`
[INFO] [stdout] 924b0be8cdf22a07025d7c02bc606121e6da807f12c6ababe6277f022c55dbcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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] e60cfe840932d15828352d8e53915543a4799f6e105ea8f01bf79c37e5b02608
[INFO] running `Command { std: "docker" "start" "-a" "e60cfe840932d15828352d8e53915543a4799f6e105ea8f01bf79c37e5b02608", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: field is never read: `m1`
[INFO] [stdout]   --> learn-general-rust/src/look_ahead.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     m1: BM1,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learn-general-rust v0.1.0 (/opt/rustwide/workdir/learn-general-rust)
[INFO] [stdout] warning: field is never read: `m2`
[INFO] [stdout]   --> learn-general-rust/src/look_ahead.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     m2: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learn-proc-macro v0.1.0 (/opt/rustwide/workdir/learn-proc-macro)
[INFO] [stdout] attr: ""
[INFO] [stdout] item: "pub fn invoke1() { }"
[INFO] [stdout] attr: "bar"
[INFO] [stdout] item: "pub fn invoke2() { }"
[INFO] [stdout] attr: "multiple => tokens"
[INFO] [stdout] item: "pub fn invoke3() { }"
[INFO] [stdout] attr: "delimiters"
[INFO] [stdout] item: "pub fn invoke4() { }"
[INFO] [stdout] warning: field is never read: `m1`
[INFO] [stdout]   --> learn-general-rust/src/look_ahead.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     m1: BM1,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `m2`
[INFO] [stdout]   --> learn-general-rust/src/look_ahead.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     m2: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "e60cfe840932d15828352d8e53915543a4799f6e105ea8f01bf79c37e5b02608", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e60cfe840932d15828352d8e53915543a4799f6e105ea8f01bf79c37e5b02608", kill_on_drop: false }`
[INFO] [stdout] e60cfe840932d15828352d8e53915543a4799f6e105ea8f01bf79c37e5b02608
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7c669073e3775594775d36116647912c9437ddab9e1b45164c2adfb49ed5e6bb
[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" "7c669073e3775594775d36116647912c9437ddab9e1b45164c2adfb49ed5e6bb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: field is never read: `m1`
[INFO] [stderr]   --> learn-general-rust/src/look_ahead.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     m1: BM1,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `m2`
[INFO] [stderr]   --> learn-general-rust/src/look_ahead.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     m2: String,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `m1`
[INFO] [stderr]   --> learn-general-rust/src/look_ahead.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     m1: BM1,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `m2`
[INFO] [stderr]   --> learn-general-rust/src/look_ahead.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     m2: String,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/learn_general_rust-131ff4bbec5c41a0)
[INFO] [stdout] 
[INFO] [stdout] running 30 tests
[INFO] [stdout] test cache::test::new ... ok
[INFO] [stdout] test cache::test::eval ... ok
[INFO] [stdout] test cache::test::update ... ok
[INFO] [stdout] test const_generic_workaround::test::one_element_slice_workaround ... ok
[INFO] [stdout] test const_generic_workaround::test::seven_elements ... ok
[INFO] [stdout] test const_generic_workaround::test::seven_elements_slice_workaround ... ok
[INFO] [stdout] test const_generic_workaround::test::one_element ... ok
[INFO] [stdout] test const_generic_workaround::test::two_elements ... ok
[INFO] [stdout] test const_generic_workaround::test::two_elements_slice_workaround ... ok
[INFO] [stdout] test enum_val::test::play ... ok
[INFO] [stdout] test full_qualifier::test::down_counter_functions ... ok
[INFO] [stdout] test full_qualifier::test::down_counter_method ... ok
[INFO] [stdout] test full_qualifier::test::flip_flop_functions ... ok
[INFO] [stdout] test full_qualifier::test::flip_flop_method ... ok
[INFO] [stdout] test full_qualifier::test::up_counter_functions ... ok
[INFO] [stdout] test full_qualifier::test::up_counter_method ... ok
[INFO] [stdout] test interior_mut::test::mock_counts_calls ... ok
[INFO] [stdout] test interior_mut::test::mock_gets_replaced ... ok
[INFO] [stdout] test ref_lifetime::test::scoped_lifetime ... ok
[INFO] [stdout] test look_ahead::test::infer_type ... ok
[INFO] [stdout] test ref_lifetime::test::static_lifetime ... ok
[INFO] [stdout] test ref_spec::test::borrow_rvalue ... ok
[INFO] [stdout] test ref_spec::test::deref_coercion ... ok
[INFO] [stdout] test ref_spec::test::value_vs_ref ... ok
[INFO] [stdout] test tuple::test::tuple_struct ... ok
[INFO] [stdout] test turbo_fish::test::reference_examples ... ok
[INFO] [stdout] test turbo_fish::test::rust_infers_type ... ok
[INFO] [stdout] test turbo_fish::test::specify_type_turbo_fish ... ok
[INFO] [stdout] test use_trait::test::trait_interface_call ... ok
[INFO] [stdout] test use_trait::test::member_interface_call ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 30 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/learn_proc_macro-18e1b38bb615dff8)
[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] [stderr]      Running tests/cutom_debug.rs (/opt/rustwide/target/debug/deps/cutom_debug-e9ecb3bcb82d67e6)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test custom_debug ... 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] [stderr]      Running tests/show_streams.rs (/opt/rustwide/target/debug/deps/show_streams-f0ae54f7e1892d11)
[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 learn-general-rust
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/use_trait.rs - use_trait::display_l (line 71) - compile fail ... ok
[INFO] [stdout] test src/const_generic_workaround.rs - const_generic_workaround::fibonacci_not_implemented_for_eight_element_array (line 56) - compile fail ... ok
[INFO] [stdout] test src/use_trait.rs - use_trait::display_name (line 59) - compile fail ... ok
[INFO] [stdout] test src/ref_lifetime.rs - ref_lifetime::longest (line 23) - compile fail ... ok
[INFO] [stdout] test src/full_qualifier.rs - full_qualifier::tik (line 46) - compile fail ... ok
[INFO] [stdout] test src/private_public.rs - private_public::sub (line 54) - compile fail ... ok
[INFO] [stdout] test src/private_public.rs - private_public::b::dec (line 67) - compile fail ... ok
[INFO] [stdout] test src/private_public.rs - private_public::b::comp (line 81) - compile fail ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.38s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests learn-proc-macro
[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] running `Command { std: "docker" "inspect" "7c669073e3775594775d36116647912c9437ddab9e1b45164c2adfb49ed5e6bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c669073e3775594775d36116647912c9437ddab9e1b45164c2adfb49ed5e6bb", kill_on_drop: false }`
[INFO] [stdout] 7c669073e3775594775d36116647912c9437ddab9e1b45164c2adfb49ed5e6bb