[INFO] cloning repository https://github.com/zaphar/ucg
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zaphar/ucg" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzaphar%2Fucg", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzaphar%2Fucg'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ae4b910048fd6f1cbd7658d9f9ce922736317c7
[INFO] checking zaphar/ucg against master#46424fb5054f211ec836c5c03159f92e46bb35ac for pr-139042
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzaphar%2Fucg" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zaphar/ucg on toolchain 46424fb5054f211ec836c5c03159f92e46bb35ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zaphar/ucg
[INFO] finished tweaking git repo https://github.com/zaphar/ucg
[INFO] tweaked toml for git repo https://github.com/zaphar/ucg written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zaphar/ucg already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bencher v0.1.5
[INFO] [stderr]   Downloaded fd-lock v3.0.8
[INFO] [stderr]   Downloaded rustyline v10.1.0
[INFO] [stderr]   Downloaded clap v2.33.4
[INFO] [stderr]   Downloaded abortable_parser v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a03c606554a104cd6b8e14d8b08d7d2efe01d0f4d78f3ce4ef94d2f914b917af
[INFO] running `Command { std: "docker" "start" "-a" "a03c606554a104cd6b8e14d8b08d7d2efe01d0f4d78f3ce4ef94d2f914b917af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a03c606554a104cd6b8e14d8b08d7d2efe01d0f4d78f3ce4ef94d2f914b917af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a03c606554a104cd6b8e14d8b08d7d2efe01d0f4d78f3ce4ef94d2f914b917af", kill_on_drop: false }`
[INFO] [stdout] a03c606554a104cd6b8e14d8b08d7d2efe01d0f4d78f3ce4ef94d2f914b917af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37cd11e98afb2aad1207615bacb9c842eba789ca640fb2586019d497b84088e1
[INFO] running `Command { std: "docker" "start" "-a" "37cd11e98afb2aad1207615bacb9c842eba789ca640fb2586019d497b84088e1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.4
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling rustix v0.36.16
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]     Checking linux-raw-sys v0.1.4
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[INFO] [stderr]     Checking nibble_vec v0.1.0
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[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking aho-corasick v0.7.20
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[INFO] [stderr]     Checking unsafe-libyaml v0.2.10
[INFO] [stderr]     Checking utf8parse v0.2.0
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[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking unicode-segmentation v1.10.0
[INFO] [stderr]    Compiling ucg v0.7.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking xml-rs v0.8.4
[INFO] [stderr]     Checking simple-error v0.2.3
[INFO] [stderr]     Checking abortable_parser v0.2.3
[INFO] [stderr]     Checking base64 v0.21.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking nix v0.26.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking clap v2.33.4
[INFO] [stderr]     Checking serde_yaml v0.9.16
[INFO] [stderr]     Checking toml v0.5.10
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking fd-lock v3.0.8
[INFO] [stderr]     Checking rustyline v10.1.0
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/parse/precedence.rs:396:70
[INFO] [stdout]     |
[INFO] [stdout] 396 | pub fn op_expression<'a>(i: SliceIter<'a, Token>) -> Result<SliceIter<Token>, Expression> {
[INFO] [stdout]     |                      -- lifetime `'a` declared here                  ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/parse/precedence.rs:396:70
[INFO] [stdout]     |
[INFO] [stdout] 396 | pub fn op_expression<'a>(i: SliceIter<'a, Token>) -> Result<SliceIter<Token>, Expression> {
[INFO] [stdout]     |                      -- lifetime `'a` declared here                  ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/mod.rs:125:42
[INFO] [stdout]     |
[INFO] [stdout] 125 |             environment: self.environment.clone(),
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<Stdout, Stderr>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<Stdout, Stderr>>` 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] 125 -             environment: self.environment.clone(),
[INFO] [stdout] 125 +             environment: self.environment,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:424:66
[INFO] [stdout]     |
[INFO] [stdout] 424 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 424 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 424 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:441:66
[INFO] [stdout]     |
[INFO] [stdout] 441 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 441 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 441 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:473:66
[INFO] [stdout]     |
[INFO] [stdout] 473 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 473 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 473 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:536:66
[INFO] [stdout]     |
[INFO] [stdout] 536 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 536 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 536 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:562:66
[INFO] [stdout]     |
[INFO] [stdout] 562 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 562 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 562 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:584:66
[INFO] [stdout]     |
[INFO] [stdout] 584 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 584 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 584 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:687:66
[INFO] [stdout]     |
[INFO] [stdout] 687 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 687 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 687 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:704:66
[INFO] [stdout]     |
[INFO] [stdout] 704 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 704 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 704 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:717:66
[INFO] [stdout]     |
[INFO] [stdout] 717 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 717 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 717 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/vm.rs:549:78
[INFO] [stdout]     |
[INFO] [stdout] 549 |                 Self::fcall_impl(f, self.runtime.strict, &mut self.stack, env.clone(), &self.import_stack))?;
[INFO] [stdout]     |                                                                              ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 549 -                 Self::fcall_impl(f, self.runtime.strict, &mut self.stack, env.clone(), &self.import_stack))?;
[INFO] [stdout] 549 +                 Self::fcall_impl(f, self.runtime.strict, &mut self.stack, env, &self.import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/mod.rs:125:42
[INFO] [stdout]     |
[INFO] [stdout] 125 |             environment: self.environment.clone(),
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<Stdout, Stderr>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<Stdout, Stderr>>` 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] 125 -             environment: self.environment.clone(),
[INFO] [stdout] 125 +             environment: self.environment,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:424:66
[INFO] [stdout]     |
[INFO] [stdout] 424 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 424 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 424 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:441:66
[INFO] [stdout]     |
[INFO] [stdout] 441 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 441 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 441 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:473:66
[INFO] [stdout]     |
[INFO] [stdout] 473 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 473 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 473 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:536:66
[INFO] [stdout]     |
[INFO] [stdout] 536 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 536 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 536 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:562:66
[INFO] [stdout]     |
[INFO] [stdout] 562 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 562 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 562 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:584:66
[INFO] [stdout]     |
[INFO] [stdout] 584 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 584 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 584 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:687:66
[INFO] [stdout]     |
[INFO] [stdout] 687 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 687 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 687 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:704:66
[INFO] [stdout]     |
[INFO] [stdout] 704 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 704 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 704 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/runtime.rs:717:66
[INFO] [stdout]     |
[INFO] [stdout] 717 |                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout]     |                                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 717 -                         VM::fcall_impl(f, self.strict, stack, env.clone(), import_stack))?;
[INFO] [stdout] 717 +                         VM::fcall_impl(f, self.strict, stack, env, import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/build/opcode/vm.rs:549:78
[INFO] [stdout]     |
[INFO] [stdout] 549 |                 Self::fcall_impl(f, self.runtime.strict, &mut self.stack, env.clone(), &self.import_stack))?;
[INFO] [stdout]     |                                                                              ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `RefCell<Environment<O, E>>` does not implement `Clone`, so calling `clone` on `&RefCell<Environment<O, E>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 549 -                 Self::fcall_impl(f, self.runtime.strict, &mut self.stack, env.clone(), &self.import_stack))?;
[INFO] [stdout] 549 +                 Self::fcall_impl(f, self.runtime.strict, &mut self.stack, env, &self.import_stack))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.83s
[INFO] running `Command { std: "docker" "inspect" "37cd11e98afb2aad1207615bacb9c842eba789ca640fb2586019d497b84088e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37cd11e98afb2aad1207615bacb9c842eba789ca640fb2586019d497b84088e1", kill_on_drop: false }`
[INFO] [stdout] 37cd11e98afb2aad1207615bacb9c842eba789ca640fb2586019d497b84088e1
