[INFO] cloning repository https://github.com/ftxqxd/opus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ftxqxd/opus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fftxqxd%2Fopus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fftxqxd%2Fopus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10613548ab2af7189e9287dda41f6be3c159c427
[INFO] checking ftxqxd/opus against try#79452e8441468c5568c20bfca2aa1fe75b645b2d for pr-152210
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fftxqxd%2Fopus" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ftxqxd/opus
[INFO] finished tweaking git repo https://github.com/ftxqxd/opus
[INFO] tweaked toml for git repo https://github.com/ftxqxd/opus written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ftxqxd/opus on toolchain 79452e8441468c5568c20bfca2aa1fe75b645b2d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ftxqxd/opus 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" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded typed-arena v1.4.1
[INFO] [stderr]   Downloaded llvm-sys v70.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b25d5c6aa399eabc0ca4072752e69047b0bdc4295a0916e8ed8087ca261af73
[INFO] running `Command { std: "docker" "start" "-a" "1b25d5c6aa399eabc0ca4072752e69047b0bdc4295a0916e8ed8087ca261af73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b25d5c6aa399eabc0ca4072752e69047b0bdc4295a0916e8ed8087ca261af73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b25d5c6aa399eabc0ca4072752e69047b0bdc4295a0916e8ed8087ca261af73", kill_on_drop: false }`
[INFO] [stdout] 1b25d5c6aa399eabc0ca4072752e69047b0bdc4295a0916e8ed8087ca261af73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c2ef61001dddcad106e0ee6e84a40df9df8e6fcb94b62a1d6c7578a278b0f33
[INFO] running `Command { std: "docker" "start" "-a" "3c2ef61001dddcad106e0ee6e84a40df9df8e6fcb94b62a1d6c7578a278b0f33", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling utf8-ranges v1.0.3
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling libc v0.2.59
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling regex-syntax v0.6.8
[INFO] [stderr]     Checking typed-arena v1.4.1
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]    Compiling llvm-sys v70.2.1
[INFO] [stderr]     Checking opus v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/compile.rs:513:13
[INFO] [stdout]     |
[INFO] [stdout] 513 |         let mut ptr = self.function_arena.alloc(function);
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/compile.rs:513:13
[INFO] [stdout]     |
[INFO] [stdout] 513 |         let mut ptr = self.function_arena.alloc(function);
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `is_temporary` is never read
[INFO] [stdout]   --> src/generate_ir.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct Variable {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 71 |     pub typ: TypeId,
[INFO] [stdout] 72 |     pub is_temporary: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Variable` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:148:36
[INFO] [stdout]     |
[INFO] [stdout] 148 |             self.locals.insert(name.clone(), variable_id);
[INFO] [stdout]     |                                    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:256:78
[INFO] [stdout]     |
[INFO] [stdout] 256 |                     self.compiler.report_error(Error::ShadowedName(span, name.clone()));
[INFO] [stdout]     |                                                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:261:48
[INFO] [stdout]     |
[INFO] [stdout] 261 |                     self.locals_stack.push(name.clone());
[INFO] [stdout]     |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:262:44
[INFO] [stdout]     |
[INFO] [stdout] 262 |                     self.locals.insert(name.clone(), new_variable_id);
[INFO] [stdout]     |                                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:411:78
[INFO] [stdout]     |
[INFO] [stdout] 411 |                     self.compiler.report_error(Error::ShadowedName(span, name.clone()));
[INFO] [stdout]     |                                                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:416:48
[INFO] [stdout]     |
[INFO] [stdout] 416 |                     self.locals_stack.push(name.clone());
[INFO] [stdout]     |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:417:44
[INFO] [stdout]     |
[INFO] [stdout] 417 |                     self.locals.insert(name.clone(), new_variable_id);
[INFO] [stdout]     |                                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]     --> src/generate_ir.rs:1010:78
[INFO] [stdout]      |
[INFO] [stdout] 1010 |                     self.compiler.report_error(Error::ShadowedName(span, name.clone()));
[INFO] [stdout]      |                                                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]     --> src/generate_ir.rs:1016:48
[INFO] [stdout]      |
[INFO] [stdout] 1016 |                     self.locals_stack.push(name.clone());
[INFO] [stdout]      |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]     --> src/generate_ir.rs:1017:44
[INFO] [stdout]      |
[INFO] [stdout] 1017 |                     self.locals.insert(name.clone(), variable_id);
[INFO] [stdout]      |                                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `is_temporary` is never read
[INFO] [stdout]   --> src/generate_ir.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct Variable {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 71 |     pub typ: TypeId,
[INFO] [stdout] 72 |     pub is_temporary: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Variable` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:148:36
[INFO] [stdout]     |
[INFO] [stdout] 148 |             self.locals.insert(name.clone(), variable_id);
[INFO] [stdout]     |                                    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:256:78
[INFO] [stdout]     |
[INFO] [stdout] 256 |                     self.compiler.report_error(Error::ShadowedName(span, name.clone()));
[INFO] [stdout]     |                                                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:261:48
[INFO] [stdout]     |
[INFO] [stdout] 261 |                     self.locals_stack.push(name.clone());
[INFO] [stdout]     |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:262:44
[INFO] [stdout]     |
[INFO] [stdout] 262 |                     self.locals.insert(name.clone(), new_variable_id);
[INFO] [stdout]     |                                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:411:78
[INFO] [stdout]     |
[INFO] [stdout] 411 |                     self.compiler.report_error(Error::ShadowedName(span, name.clone()));
[INFO] [stdout]     |                                                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:416:48
[INFO] [stdout]     |
[INFO] [stdout] 416 |                     self.locals_stack.push(name.clone());
[INFO] [stdout]     |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/generate_ir.rs:417:44
[INFO] [stdout]     |
[INFO] [stdout] 417 |                     self.locals.insert(name.clone(), new_variable_id);
[INFO] [stdout]     |                                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]     --> src/generate_ir.rs:1010:78
[INFO] [stdout]      |
[INFO] [stdout] 1010 |                     self.compiler.report_error(Error::ShadowedName(span, name.clone()));
[INFO] [stdout]      |                                                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]     --> src/generate_ir.rs:1016:48
[INFO] [stdout]      |
[INFO] [stdout] 1016 |                     self.locals_stack.push(name.clone());
[INFO] [stdout]      |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]     --> src/generate_ir.rs:1017:44
[INFO] [stdout]      |
[INFO] [stdout] 1017 |                     self.locals.insert(name.clone(), variable_id);
[INFO] [stdout]      |                                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.09s
[INFO] running `Command { std: "docker" "inspect" "3c2ef61001dddcad106e0ee6e84a40df9df8e6fcb94b62a1d6c7578a278b0f33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c2ef61001dddcad106e0ee6e84a40df9df8e6fcb94b62a1d6c7578a278b0f33", kill_on_drop: false }`
[INFO] [stdout] 3c2ef61001dddcad106e0ee6e84a40df9df8e6fcb94b62a1d6c7578a278b0f33
