[INFO] cloning repository https://github.com/KeenS/webml [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KeenS/webml" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeenS%2Fwebml", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeenS%2Fwebml'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 95d4541352131b65ccef05f1df648591d4c0df2d [INFO] checking KeenS/webml against try#86f78589b09557f70c9db3f56ad1921e0a9f76ef for pr-138438 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeenS%2Fwebml" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/KeenS/webml on toolchain 86f78589b09557f70c9db3f56ad1921e0a9f76ef [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+86f78589b09557f70c9db3f56ad1921e0a9f76ef" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain [INFO] started tweaking git repo https://github.com/KeenS/webml [INFO] finished tweaking git repo https://github.com/KeenS/webml [INFO] tweaked toml for git repo https://github.com/KeenS/webml written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/KeenS/webml 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" "+86f78589b09557f70c9db3f56ad1921e0a9f76ef" "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 web-assembler v0.1.2 [INFO] [stderr] Downloaded bytecount v0.6.2 [INFO] [stderr] Downloaded nom_locate v4.0.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+86f78589b09557f70c9db3f56ad1921e0a9f76ef" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 3b1f94916db0d8025fd01f0874ab530ca6a283cb16cf02293f5604b7921aca87 [INFO] running `Command { std: "docker" "start" "-a" "3b1f94916db0d8025fd01f0874ab530ca6a283cb16cf02293f5604b7921aca87", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3b1f94916db0d8025fd01f0874ab530ca6a283cb16cf02293f5604b7921aca87", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3b1f94916db0d8025fd01f0874ab530ca6a283cb16cf02293f5604b7921aca87", kill_on_drop: false }` [INFO] [stdout] 3b1f94916db0d8025fd01f0874ab530ca6a283cb16cf02293f5604b7921aca87 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+86f78589b09557f70c9db3f56ad1921e0a9f76ef" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ec8786c77a967ccb9cc4ee11730b3bdaf1727ab24ba00f3bd0342e3c3f3adf9c [INFO] running `Command { std: "docker" "start" "-a" "ec8786c77a967ccb9cc4ee11730b3bdaf1727ab24ba00f3bd0342e3c3f3adf9c", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.119 [INFO] [stderr] Compiling nom v7.1.0 [INFO] [stderr] Checking quick-error v1.2.3 [INFO] [stderr] Checking termcolor v1.1.3 [INFO] [stderr] Checking bytecount v0.6.2 [INFO] [stderr] Checking ordermap v0.3.5 [INFO] [stderr] Checking fixedbitset v0.1.9 [INFO] [stderr] Checking web-assembler v0.1.2 [INFO] [stderr] Checking humantime v1.3.0 [INFO] [stderr] Checking petgraph v0.4.13 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking env_logger v0.7.1 [INFO] [stderr] Checking clap v2.34.0 [INFO] [stderr] Checking nom_locate v4.0.0 [INFO] [stderr] Checking webml v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: method `traverse_string` is never used [INFO] [stdout] --> src/ast/util.rs:151:8 [INFO] [stdout] | [INFO] [stdout] 3 | pub trait Traverse { [INFO] [stdout] | -------- method in this trait [INFO] [stdout] ... [INFO] [stdout] 151 | fn traverse_string(&mut self, _: Span, _value: &mut Vec) {} [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/mir/hir2mir.rs:323:27 [INFO] [stdout] | [INFO] [stdout] 323 | Tuple(Vec), [INFO] [stdout] | ----- ^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 323 - Tuple(Vec), [INFO] [stdout] 323 + Tuple(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement [INFO] [stdout] --> src/lir/pp.rs:133:30 [INFO] [stdout] | [INFO] [stdout] 133 | for label in default { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 133 - for label in default { [INFO] [stdout] 133 + while let Some(label) = default { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 133 - for label in default { [INFO] [stdout] 133 + if let Some(label) = default { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement [INFO] [stdout] --> src/mir/pp.rs:326:37 [INFO] [stdout] | [INFO] [stdout] 326 | for (arm, _) in default { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 326 - for (arm, _) in default { [INFO] [stdout] 326 + while let Some((arm, _)) = default { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 326 - for (arm, _) in default { [INFO] [stdout] 326 + if let Some((arm, _)) = default { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `traverse_string` is never used [INFO] [stdout] --> src/ast/util.rs:151:8 [INFO] [stdout] | [INFO] [stdout] 3 | pub trait Traverse { [INFO] [stdout] | -------- method in this trait [INFO] [stdout] ... [INFO] [stdout] 151 | fn traverse_string(&mut self, _: Span, _value: &mut Vec) {} [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/mir/hir2mir.rs:323:27 [INFO] [stdout] | [INFO] [stdout] 323 | Tuple(Vec), [INFO] [stdout] | ----- ^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 323 - Tuple(Vec), [INFO] [stdout] 323 + Tuple(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement [INFO] [stdout] --> src/lir/pp.rs:133:30 [INFO] [stdout] | [INFO] [stdout] 133 | for label in default { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 133 - for label in default { [INFO] [stdout] 133 + while let Some(label) = default { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 133 - for label in default { [INFO] [stdout] 133 + if let Some(label) = default { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement [INFO] [stdout] --> src/mir/pp.rs:326:37 [INFO] [stdout] | [INFO] [stdout] 326 | for (arm, _) in default { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 326 - for (arm, _) in default { [INFO] [stdout] 326 + while let Some((arm, _)) = default { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 326 - for (arm, _) in default { [INFO] [stdout] 326 + if let Some((arm, _)) = default { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.25s [INFO] running `Command { std: "docker" "inspect" "ec8786c77a967ccb9cc4ee11730b3bdaf1727ab24ba00f3bd0342e3c3f3adf9c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ec8786c77a967ccb9cc4ee11730b3bdaf1727ab24ba00f3bd0342e3c3f3adf9c", kill_on_drop: false }` [INFO] [stdout] ec8786c77a967ccb9cc4ee11730b3bdaf1727ab24ba00f3bd0342e3c3f3adf9c