[INFO] cloning repository https://github.com/brson/piddle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brson/piddle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrson%2Fpiddle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrson%2Fpiddle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 740fc3718248a4cfc59df356c26209eb5f321494
[INFO] checking brson/piddle against eca445e5ae4a6679cc27d3a09106ce245e13a5a6 for pr-162478
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrson%2Fpiddle" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/brson/piddle
[INFO] finished tweaking git repo https://github.com/brson/piddle
[INFO] tweaked toml for git repo https://github.com/brson/piddle written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brson/piddle on toolchain eca445e5ae4a6679cc27d3a09106ce245e13a5a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brson/piddle 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" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded string-interner v0.13.0
[INFO] [stderr]   Downloaded structopt v0.3.22
[INFO] [stderr]   Downloaded rustyline v9.0.0
[INFO] [stderr]   Downloaded str-buf v1.0.5
[INFO] [stderr]   Downloaded error-code v2.3.0
[INFO] [stderr]   Downloaded clipboard-win v4.2.1
[INFO] [stderr]   Downloaded fd-lock v3.0.0
[INFO] [stderr]   Downloaded structopt-derive v0.4.15
[INFO] [stderr]   Downloaded utf8parse v0.2.0
[INFO] [stderr]   Downloaded anyhow v1.0.43
[INFO] [stderr]   Downloaded hecs v0.6.4
[INFO] [stderr]   Downloaded minimal-lexical v0.1.2
[INFO] [stderr]   Downloaded nom v7.0.0
[INFO] [stderr]   Downloaded nix v0.22.1
[INFO] [stderr]   Downloaded libc v0.2.99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236
[INFO] running `Command { std: "docker" "start" "4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling minimal-lexical v0.1.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]    Compiling nom v7.0.0
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking unicode-segmentation v1.8.0
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking nix v0.22.1
[INFO] [stderr]     Checking fd-lock v3.0.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking hecs v0.6.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking string-interner v0.13.0
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]     Checking rustyline v9.0.0
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking structopt v0.3.22
[INFO] [stderr]     Checking piddle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 drop(from_module_ctxt);
[INFO] [stdout]     |                 ^^^^^----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 140 -                 drop(from_module_ctxt);
[INFO] [stdout] 140 +                 let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:166:5
[INFO] [stdout]     |
[INFO] [stdout] 166 |     drop(from_module_ctxt);
[INFO] [stdout]     |     ^^^^^----------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 166 -     drop(from_module_ctxt);
[INFO] [stdout] 166 +     let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |                 drop(from_module_ctxt);
[INFO] [stdout]     |                 ^^^^^----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 173 -                 drop(from_module_ctxt);
[INFO] [stdout] 173 +                 let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:202:9
[INFO] [stdout]     |
[INFO] [stdout] 202 |         drop(module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 202 -         drop(module_ctxt);
[INFO] [stdout] 202 +         let _ = module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         drop(module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 224 -         drop(module_ctxt);
[INFO] [stdout] 224 +         let _ = module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:231:13
[INFO] [stdout]     |
[INFO] [stdout] 231 |             drop(other_module_ctxt);
[INFO] [stdout]     |             ^^^^^-----------------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 231 -             drop(other_module_ctxt);
[INFO] [stdout] 231 +             let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         drop(other_module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 246 -         drop(other_module_ctxt);
[INFO] [stdout] 246 +         let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 |         drop(other_module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 261 -         drop(other_module_ctxt);
[INFO] [stdout] 261 +         let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 drop(from_module_ctxt);
[INFO] [stdout]     |                 ^^^^^----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 140 -                 drop(from_module_ctxt);
[INFO] [stdout] 140 +                 let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:166:5
[INFO] [stdout]     |
[INFO] [stdout] 166 |     drop(from_module_ctxt);
[INFO] [stdout]     |     ^^^^^----------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 166 -     drop(from_module_ctxt);
[INFO] [stdout] 166 +     let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |                 drop(from_module_ctxt);
[INFO] [stdout]     |                 ^^^^^----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 173 -                 drop(from_module_ctxt);
[INFO] [stdout] 173 +                 let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:202:9
[INFO] [stdout]     |
[INFO] [stdout] 202 |         drop(module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 202 -         drop(module_ctxt);
[INFO] [stdout] 202 +         let _ = module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         drop(module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 224 -         drop(module_ctxt);
[INFO] [stdout] 224 +         let _ = module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:231:13
[INFO] [stdout]     |
[INFO] [stdout] 231 |             drop(other_module_ctxt);
[INFO] [stdout]     |             ^^^^^-----------------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 231 -             drop(other_module_ctxt);
[INFO] [stdout] 231 +             let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         drop(other_module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 246 -         drop(other_module_ctxt);
[INFO] [stdout] 246 +         let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 |         drop(other_module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 261 -         drop(other_module_ctxt);
[INFO] [stdout] 261 +         let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused dependency `structopt`
[INFO] [stderr]  --> Cargo.toml:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | structopt = "0.3.22"
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `structopt`
[INFO] [stderr] warning: `piddle` (manifest) generated 1 warning
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.58s
[INFO] running `Command { std: "docker" "inspect" "4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236", kill_on_drop: false }`
[INFO] [stdout] 4644e726a5722634b1fb467a5406f61e3909c9935e969065fe6bacbb718c6236
