[INFO] fetching crate kaon 0.1.4...
[INFO] checking kaon-0.1.4 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate kaon 0.1.4 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate kaon 0.1.4
[INFO] finished tweaking crates.io crate kaon 0.1.4
[INFO] tweaked toml for crates.io crate kaon 0.1.4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate kaon 0.1.4 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 79 packages to latest compatible versions
[INFO] [stderr]       Adding ahash v0.7.8 (available: v0.8.12)
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.7.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1211cb0c6e08df2b0ff45ede80e7fa6ab3b73e1e410d08b06d6f27612f32a72
[INFO] running `Command { std: "docker" "start" "-a" "c1211cb0c6e08df2b0ff45ede80e7fa6ab3b73e1e410d08b06d6f27612f32a72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1211cb0c6e08df2b0ff45ede80e7fa6ab3b73e1e410d08b06d6f27612f32a72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1211cb0c6e08df2b0ff45ede80e7fa6ab3b73e1e410d08b06d6f27612f32a72", kill_on_drop: false }`
[INFO] [stdout] c1211cb0c6e08df2b0ff45ede80e7fa6ab3b73e1e410d08b06d6f27612f32a72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 188b4b4b30892233ef631786482fe0758a0c93ebfec62d73ff8996e060b00d3b
[INFO] running `Command { std: "docker" "start" "-a" "188b4b4b30892233ef631786482fe0758a0c93ebfec62d73ff8996e060b00d3b", kill_on_drop: false }`
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]     Checking regex-automata v0.4.10
[INFO] [stderr]     Checking csv-core v0.1.12
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking rayon v1.11.0
[INFO] [stderr]     Checking csv v1.3.1
[INFO] [stderr]     Checking kaon v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex v1.11.2
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/compiler/ast.rs:57:22
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub struct StmtBlock(SmallVec<[Stmt; 4]>, Span);
[INFO] [stdout]    |            --------- ^^^^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/runtime/vm.rs:311:56
[INFO] [stdout]     |
[INFO] [stdout] 311 |                     self.stack.push(data.value.as_ref().borrow().clone());
[INFO] [stdout]     |                                                        ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Value` does not implement `Borrow`, so calling `borrow` on `&Value` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 311 -                     self.stack.push(data.value.as_ref().borrow().clone());
[INFO] [stdout] 311 +                     self.stack.push(data.value.as_ref().clone());
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Value`, implement `Clone` for it
[INFO] [stdout]    --> src/common/value.rs:19:1
[INFO] [stdout]     |
[INFO] [stdout]  19 + #[derive(Clone)]
[INFO] [stdout]  20 | pub enum Value {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/runtime/vm.rs:585:52
[INFO] [stdout]     |
[INFO] [stdout] 585 |             upvalue.closed = upvalue.value.as_ref().borrow().clone();
[INFO] [stdout]     |                                                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Value` does not implement `Borrow`, so calling `borrow` on `&Value` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 585 -             upvalue.closed = upvalue.value.as_ref().borrow().clone();
[INFO] [stdout] 585 +             upvalue.closed = upvalue.value.as_ref().clone();
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Value`, implement `Clone` for it
[INFO] [stdout]    --> src/common/value.rs:19:1
[INFO] [stdout]     |
[INFO] [stdout]  19 + #[derive(Clone)]
[INFO] [stdout]  20 | pub enum Value {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/runtime/vm.rs:588:74
[INFO] [stdout]     |
[INFO] [stdout] 588 |             self.open_upvalues = upvalue.next.as_ref().map(|v| v.as_ref().borrow().clone());
[INFO] [stdout]     |                                                                          ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Upvalue` does not implement `Borrow`, so calling `borrow` on `&Upvalue` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 588 -             self.open_upvalues = upvalue.next.as_ref().map(|v| v.as_ref().borrow().clone());
[INFO] [stdout] 588 +             self.open_upvalues = upvalue.next.as_ref().map(|v| v.as_ref().clone());
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Upvalue`, implement `Clone` for it
[INFO] [stdout]    --> src/common/value.rs:832:1
[INFO] [stdout]     |
[INFO] [stdout] 832 + #[derive(Clone)]
[INFO] [stdout] 833 | pub struct Upvalue {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MockError` is never constructed
[INFO] [stdout]  --> tests/test_error.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct MockError;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/compiler/ast.rs:57:22
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub struct StmtBlock(SmallVec<[Stmt; 4]>, Span);
[INFO] [stdout]    |            --------- ^^^^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/runtime/vm.rs:311:56
[INFO] [stdout]     |
[INFO] [stdout] 311 |                     self.stack.push(data.value.as_ref().borrow().clone());
[INFO] [stdout]     |                                                        ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `value::Value` does not implement `Borrow`, so calling `borrow` on `&value::Value` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 311 -                     self.stack.push(data.value.as_ref().borrow().clone());
[INFO] [stdout] 311 +                     self.stack.push(data.value.as_ref().clone());
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `value::Value`, implement `Clone` for it
[INFO] [stdout]    --> src/common/value.rs:19:1
[INFO] [stdout]     |
[INFO] [stdout]  19 + #[derive(Clone)]
[INFO] [stdout]  20 | pub enum Value {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/runtime/vm.rs:585:52
[INFO] [stdout]     |
[INFO] [stdout] 585 |             upvalue.closed = upvalue.value.as_ref().borrow().clone();
[INFO] [stdout]     |                                                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `value::Value` does not implement `Borrow`, so calling `borrow` on `&value::Value` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 585 -             upvalue.closed = upvalue.value.as_ref().borrow().clone();
[INFO] [stdout] 585 +             upvalue.closed = upvalue.value.as_ref().clone();
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `value::Value`, implement `Clone` for it
[INFO] [stdout]    --> src/common/value.rs:19:1
[INFO] [stdout]     |
[INFO] [stdout]  19 + #[derive(Clone)]
[INFO] [stdout]  20 | pub enum Value {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/runtime/vm.rs:588:74
[INFO] [stdout]     |
[INFO] [stdout] 588 |             self.open_upvalues = upvalue.next.as_ref().map(|v| v.as_ref().borrow().clone());
[INFO] [stdout]     |                                                                          ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Upvalue` does not implement `Borrow`, so calling `borrow` on `&Upvalue` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 588 -             self.open_upvalues = upvalue.next.as_ref().map(|v| v.as_ref().borrow().clone());
[INFO] [stdout] 588 +             self.open_upvalues = upvalue.next.as_ref().map(|v| v.as_ref().clone());
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Upvalue`, implement `Clone` for it
[INFO] [stdout]    --> src/common/value.rs:832:1
[INFO] [stdout]     |
[INFO] [stdout] 832 + #[derive(Clone)]
[INFO] [stdout] 833 | pub struct Upvalue {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.70s
[INFO] running `Command { std: "docker" "inspect" "188b4b4b30892233ef631786482fe0758a0c93ebfec62d73ff8996e060b00d3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "188b4b4b30892233ef631786482fe0758a0c93ebfec62d73ff8996e060b00d3b", kill_on_drop: false }`
[INFO] [stdout] 188b4b4b30892233ef631786482fe0758a0c93ebfec62d73ff8996e060b00d3b