[INFO] fetching crate stream_multiplexer 0.16.1... [INFO] checking stream_multiplexer-0.16.1 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-4 [INFO] extracting crate stream_multiplexer 0.16.1 into /workspace/builds/worker-2-tc1/source [INFO] validating manifest of crates.io crate stream_multiplexer 0.16.1 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate stream_multiplexer 0.16.1 [INFO] finished tweaking crates.io crate stream_multiplexer 0.16.1 [INFO] tweaked toml for crates.io crate stream_multiplexer 0.16.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 72 packages [INFO] [stderr] Adding alto_logger v0.3.7 (latest: v0.4.0) [INFO] [stderr] Adding async-channel v1.9.0 (latest: v2.2.0) [INFO] [stderr] Adding async-executor v0.1.2 (latest: v1.10.0) [INFO] [stderr] Adding async-io v0.1.11 (latest: v2.3.2) [INFO] [stderr] Adding async-task v3.0.0 (latest: v4.7.0) [INFO] [stderr] Adding bitflags v1.3.2 (latest: v2.5.0) [INFO] [stderr] Adding blocking v0.5.2 (latest: v1.5.1) [INFO] [stderr] Adding bytes v0.5.6 (latest: v1.6.0) [INFO] [stderr] Adding cfg-if v0.1.10 (latest: v1.0.0) [INFO] [stderr] Adding concurrent-queue v1.2.4 (latest: v2.4.0) [INFO] [stderr] Adding dashmap v4.0.2 (latest: v5.5.3) [INFO] [stderr] Adding event-listener v2.5.3 (latest: v5.3.0) [INFO] [stderr] Adding fastrand v1.9.0 (latest: v2.0.2) [INFO] [stderr] Adding futures-lite v0.1.11 (latest: v2.3.0) [INFO] [stderr] Adding parking v1.0.6 (latest: v2.2.0) [INFO] [stderr] Adding parking_lot v0.11.2 (latest: v0.12.1) [INFO] [stderr] Adding parking_lot_core v0.8.6 (latest: v0.9.9) [INFO] [stderr] Adding pin-project-lite v0.1.12 (latest: v0.2.14) [INFO] [stderr] Adding polling v0.1.9 (latest: v3.6.0) [INFO] [stderr] Adding redox_syscall v0.2.16 (latest: v0.5.1) [INFO] [stderr] Adding sharded-slab v0.0.9 (latest: v0.1.7) [INFO] [stderr] Adding smol v0.3.3 (latest: v2.0.0) [INFO] [stderr] Adding socket2 v0.3.19 (latest: v0.5.6) [INFO] [stderr] Adding tokio v0.2.25 (latest: v1.37.0) [INFO] [stderr] Adding tokio-util v0.3.1 (latest: v0.7.10) [INFO] [stderr] Adding vec-arena v0.5.2 (latest: v1.2.0) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded alto_logger v0.3.7 [INFO] [stderr] Downloaded smol v0.3.3 [INFO] [stderr] Downloaded sharded-slab v0.0.9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 26a54b1e5f468858470383673fa5c3c7e6beee84c53644fa3430f54bc7bf0659 [INFO] running `Command { std: "docker" "start" "-a" "26a54b1e5f468858470383673fa5c3c7e6beee84c53644fa3430f54bc7bf0659", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "26a54b1e5f468858470383673fa5c3c7e6beee84c53644fa3430f54bc7bf0659", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "26a54b1e5f468858470383673fa5c3c7e6beee84c53644fa3430f54bc7bf0659", kill_on_drop: false }` [INFO] [stdout] 26a54b1e5f468858470383673fa5c3c7e6beee84c53644fa3430f54bc7bf0659 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] a0b156e86099c900fe5d87ae9cdd9b039ae8af08195ac4aa3974ee0772f0bb9c [INFO] running `Command { std: "docker" "start" "-a" "a0b156e86099c900fe5d87ae9cdd9b039ae8af08195ac4aa3974ee0772f0bb9c", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.153 [INFO] [stderr] Checking pin-project-lite v0.1.12 [INFO] [stderr] Compiling crossbeam-utils v0.8.19 [INFO] [stderr] Checking cache-padded v1.3.0 [INFO] [stderr] Compiling syn v2.0.58 [INFO] [stderr] Checking vec-arena v0.5.2 [INFO] [stderr] Checking async-task v3.0.0 [INFO] [stderr] Checking parking v1.0.6 [INFO] [stderr] Checking futures-lite v0.1.11 [INFO] [stderr] Checking concurrent-queue v1.2.4 [INFO] [stderr] Checking bytes v0.5.6 [INFO] [stderr] Checking sharded-slab v0.0.9 [INFO] [stderr] Checking easy-parallel v3.3.1 [INFO] [stderr] Checking multitask v0.2.0 [INFO] [stderr] Checking alto_logger v0.3.7 [INFO] [stderr] Checking tokio v0.2.25 [INFO] [stderr] Checking concurrent-queue v2.4.0 [INFO] [stderr] Checking async-channel v1.9.0 [INFO] [stderr] Checking tokio-util v0.3.1 [INFO] [stderr] Checking blocking v0.5.2 [INFO] [stderr] Checking num_cpus v1.16.0 [INFO] [stderr] Checking polling v0.1.9 [INFO] [stderr] Checking socket2 v0.3.19 [INFO] [stderr] Checking parking_lot_core v0.8.6 [INFO] [stderr] Checking dashmap v4.0.2 [INFO] [stderr] Checking parking_lot v0.11.2 [INFO] [stderr] Checking async-io v0.1.11 [INFO] [stderr] Checking async-executor v0.1.2 [INFO] [stderr] Checking smol v0.3.3 [INFO] [stderr] Compiling thiserror-impl v1.0.58 [INFO] [stderr] Compiling futures-macro v0.3.30 [INFO] [stderr] Checking futures-util v0.3.30 [INFO] [stderr] Checking thiserror v1.0.58 [INFO] [stderr] Checking stream_multiplexer v0.16.1 (/opt/rustwide/workdir) [INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib.rs:355:33 [INFO] [stdout] | [INFO] [stdout] 341 | match self.channels.get(&channel_id) { [INFO] [stdout] | ------------------------------ [INFO] [stdout] | | [INFO] [stdout] | immutable borrow occurs here [INFO] [stdout] | a temporary with access to the immutable borrow is created here ... [INFO] [stdout] ... [INFO] [stdout] 355 | self.process_add_channel(add_res)?; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] ... [INFO] [stdout] 363 | } [INFO] [stdout] | - ... and the immutable borrow might be used here, when that temporary is dropped and runs the destructor for type `Option>, async_mutex::Mutex>)>>` [INFO] [stdout] | [INFO] [stdout] = note: the temporary is part of an expression at the end of a block; [INFO] [stdout] consider forcing this temporary to be dropped sooner, before the block's local variables are dropped [INFO] [stdout] help: for example, you could save the expression's value in a new local variable `x` and then make `x` be the expression at the end of the block [INFO] [stdout] | [INFO] [stdout] 341 ~ let x = match self.channels.get(&channel_id) { [INFO] [stdout] 342 | Some(channel_guard) => { [INFO] [stdout] ... [INFO] [stdout] 361 | None => Err(MultiplexerError::UnknownChannel(channel_id)), [INFO] [stdout] 362 ~ }; x [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib.rs:355:33 [INFO] [stdout] | [INFO] [stdout] 341 | match self.channels.get(&channel_id) { [INFO] [stdout] | ------------------------------ [INFO] [stdout] | | [INFO] [stdout] | immutable borrow occurs here [INFO] [stdout] | a temporary with access to the immutable borrow is created here ... [INFO] [stdout] ... [INFO] [stdout] 355 | self.process_add_channel(add_res)?; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] ... [INFO] [stdout] 363 | } [INFO] [stdout] | - ... and the immutable borrow might be used here, when that temporary is dropped and runs the destructor for type `Option>, async_mutex::Mutex>)>>` [INFO] [stdout] | [INFO] [stdout] = note: the temporary is part of an expression at the end of a block; [INFO] [stdout] consider forcing this temporary to be dropped sooner, before the block's local variables are dropped [INFO] [stdout] help: for example, you could save the expression's value in a new local variable `x` and then make `x` be the expression at the end of the block [INFO] [stdout] | [INFO] [stdout] 341 ~ let x = match self.channels.get(&channel_id) { [INFO] [stdout] 342 | Some(channel_guard) => { [INFO] [stdout] ... [INFO] [stdout] 361 | None => Err(MultiplexerError::UnknownChannel(channel_id)), [INFO] [stdout] 362 ~ }; x [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/lib.rs:208:9 [INFO] [stdout] | [INFO] [stdout] 206 | pub fn remove_channel(&mut self, channel: ChannelId) -> bool { [INFO] [stdout] | ---- expected `bool` because of return type [INFO] [stdout] 207 | // FIXME: What do we do with the sockets in that channel? [INFO] [stdout] 208 | self.channels.remove(&channel) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found `Option<(usize, (Sender<...>, ...))>` [INFO] [stdout] | [INFO] [stdout] = note: expected type `bool` [INFO] [stdout] found enum `Option<(usize, (async_channel::Sender>, async_mutex::Mutex>))>` [INFO] [stdout] help: use `Option::is_some` to test if the `Option` has a value [INFO] [stdout] | [INFO] [stdout] 208 | self.channels.remove(&channel).is_some() [INFO] [stdout] | ++++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/lib.rs:208:9 [INFO] [stdout] | [INFO] [stdout] 206 | pub fn remove_channel(&mut self, channel: ChannelId) -> bool { [INFO] [stdout] | ---- expected `bool` because of return type [INFO] [stdout] 207 | // FIXME: What do we do with the sockets in that channel? [INFO] [stdout] 208 | self.channels.remove(&channel) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found `Option<(usize, (Sender<...>, ...))>` [INFO] [stdout] | [INFO] [stdout] = note: expected type `bool` [INFO] [stdout] found enum `Option<(usize, (async_channel::Sender>, async_mutex::Mutex>))>` [INFO] [stdout] help: use `Option::is_some` to test if the `Option` has a value [INFO] [stdout] | [INFO] [stdout] 208 | self.channels.remove(&channel).is_some() [INFO] [stdout] | ++++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0308, E0502. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0308, E0502. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `stream_multiplexer` (lib) due to 3 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `stream_multiplexer` (lib test) due to 3 previous errors [INFO] running `Command { std: "docker" "inspect" "a0b156e86099c900fe5d87ae9cdd9b039ae8af08195ac4aa3974ee0772f0bb9c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a0b156e86099c900fe5d87ae9cdd9b039ae8af08195ac4aa3974ee0772f0bb9c", kill_on_drop: false }` [INFO] [stdout] a0b156e86099c900fe5d87ae9cdd9b039ae8af08195ac4aa3974ee0772f0bb9c