[INFO] fetching crate dart 0.1.1...
[INFO] checking dart-0.1.1 against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] extracting crate dart 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate dart 0.1.1 on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dart 0.1.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate dart 0.1.1
[INFO] tweaked toml for crates.io crate dart 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate dart 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c98335bfd9b11c1cf1a1c3a9c7f4cf050acfa9f8e4b1213e73a456c89cd0cbf
[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" "0c98335bfd9b11c1cf1a1c3a9c7f4cf050acfa9f8e4b1213e73a456c89cd0cbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c98335bfd9b11c1cf1a1c3a9c7f4cf050acfa9f8e4b1213e73a456c89cd0cbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c98335bfd9b11c1cf1a1c3a9c7f4cf050acfa9f8e4b1213e73a456c89cd0cbf", kill_on_drop: false }`
[INFO] [stdout] 0c98335bfd9b11c1cf1a1c3a9c7f4cf050acfa9f8e4b1213e73a456c89cd0cbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5455cb70a59221244e2ec0f1bbae89ce35a7ae20cb4a78c96a9fad824226a430
[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" "5455cb70a59221244e2ec0f1bbae89ce35a7ae20cb4a78c96a9fad824226a430", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling dart-sys v2.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro-hack v0.4.2
[INFO] [stderr]    Compiling mashup-impl v0.1.9
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking mashup v0.1.9
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking dart v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/dart_types/list.rs:288:21
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     std::mem::replace(self, Item::PossiblyModified(x));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/async.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | create_init_function!(async_example, [async_exports]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: assertion failed: source.starts_with(prefix)
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/async.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | export_dart_functions!(async_exports: ["randomArrayServicePort" -> random_array as async]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: assertion failed: source.starts_with(prefix)
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/sync_and_async.rs:53:1
[INFO] [stdout]    |
[INFO] [stdout] 53 | create_init_function!(exports_example, [exports]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: assertion failed: source.starts_with(prefix)
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/sync_and_async.rs:52:1
[INFO] [stdout]    |
[INFO] [stdout] 52 | export_dart_functions!(exports: ["randomArrayServicePort" -> random_array as async], ["systemSRand" -> system_s_rand]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: assertion failed: source.starts_with(prefix)
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/sync.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | create_init_function!(sync_example, [sync_exports]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: assertion failed: source.starts_with(prefix)
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/sync.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | export_dart_functions!(sync_exports: ["systemRand" -> system_rand], ["systemSRand" -> system_s_rand]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: assertion failed: source.starts_with(prefix)
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `dart_rs_init_name` in this scope
[INFO] [stdout]   --> examples/async.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | create_init_function!(async_example, [async_exports]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `random_array` in this scope
[INFO] [stdout]   --> examples/async.rs:33:68
[INFO] [stdout]    |
[INFO] [stdout] 33 | export_dart_functions!(async_exports: ["randomArrayServicePort" -> random_array as async]);
[INFO] [stdout]    |                                                                    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `dart_rs_init_name` in this scope
[INFO] [stdout]   --> examples/sync_and_async.rs:53:1
[INFO] [stdout]    |
[INFO] [stdout] 53 | create_init_function!(exports_example, [exports]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `system_s_rand` in this scope
[INFO] [stdout]   --> examples/sync_and_async.rs:52:104
[INFO] [stdout]    |
[INFO] [stdout] 52 | export_dart_functions!(exports: ["randomArrayServicePort" -> random_array as async], ["systemSRand" -> system_s_rand]);
[INFO] [stdout]    |                                                                                                        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `random_array` in this scope
[INFO] [stdout]   --> examples/sync_and_async.rs:52:62
[INFO] [stdout]    |
[INFO] [stdout] 52 | export_dart_functions!(exports: ["randomArrayServicePort" -> random_array as async], ["systemSRand" -> system_s_rand]);
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dart`
[INFO] [stdout] error: cannot find macro `dart_rs_init_name` in this scope
[INFO] [stdout]   --> examples/sync.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | create_init_function!(sync_example, [sync_exports]);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `system_s_rand` in this scope
[INFO] [stdout]   --> examples/sync.rs:36:87
[INFO] [stdout]    |
[INFO] [stdout] 36 | export_dart_functions!(sync_exports: ["systemRand" -> system_rand], ["systemSRand" -> system_s_rand]);
[INFO] [stdout]    |                                                                                       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `system_rand` in this scope
[INFO] [stdout]   --> examples/sync.rs:36:55
[INFO] [stdout]    |
[INFO] [stdout] 36 | export_dart_functions!(sync_exports: ["systemRand" -> system_rand], ["systemSRand" -> system_s_rand]);
[INFO] [stdout]    |                                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/dart_types/list.rs:288:21
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     std::mem::replace(self, Item::PossiblyModified(x));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5455cb70a59221244e2ec0f1bbae89ce35a7ae20cb4a78c96a9fad824226a430", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5455cb70a59221244e2ec0f1bbae89ce35a7ae20cb4a78c96a9fad824226a430", kill_on_drop: false }`
[INFO] [stdout] 5455cb70a59221244e2ec0f1bbae89ce35a7ae20cb4a78c96a9fad824226a430