[INFO] cloning repository https://github.com/captainbland/tree-climber
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/captainbland/tree-climber" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaptainbland%2Ftree-climber", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaptainbland%2Ftree-climber'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d42c596f40b568d7428a2abb18ae1763206d117b
[INFO] testing captainbland/tree-climber against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaptainbland%2Ftree-climber" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/captainbland/tree-climber on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/captainbland/tree-climber
[INFO] finished tweaking git repo https://github.com/captainbland/tree-climber
[INFO] tweaked toml for git repo https://github.com/captainbland/tree-climber written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/captainbland/tree-climber already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33eec062296691bf6688dcbe3bbb852c576191c0e3f3f005f4f71dc7c6bc43f9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "33eec062296691bf6688dcbe3bbb852c576191c0e3f3f005f4f71dc7c6bc43f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33eec062296691bf6688dcbe3bbb852c576191c0e3f3f005f4f71dc7c6bc43f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33eec062296691bf6688dcbe3bbb852c576191c0e3f3f005f4f71dc7c6bc43f9", kill_on_drop: false }`
[INFO] [stdout] 33eec062296691bf6688dcbe3bbb852c576191c0e3f3f005f4f71dc7c6bc43f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0d0a21eb9afe2f9e8967c04c948025330a1403bd977e24209bd617203d7a68b2
[INFO] running `Command { std: "docker" "start" "-a" "0d0a21eb9afe2f9e8967c04c948025330a1403bd977e24209bd617203d7a68b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.64
[INFO] [stderr]    Compiling unicode-width v0.1.6
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling generational-arena v0.2.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling vec-tree v0.1.2
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling climb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find value `main_child` in this scope
[INFO] [stdout]    --> src/climb/tree_tools.rs:192:25
[INFO] [stdout]     |
[INFO] [stdout] 192 |             stack.push((main_child, insert_child));
[INFO] [stdout]     |                         ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use core::fmt;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `Formatter`
[INFO] [stdout]   --> src/main.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fmt::{Error, Formatter};
[INFO] [stdout]    |                ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `unicode_segmentation::UnicodeSegmentation`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use unicode_segmentation::UnicodeSegmentation;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `vec_tree::*`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use vec_tree::*;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt`
[INFO] [stdout]  --> src/climb/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::fmt;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `Formatter`
[INFO] [stdout]  --> src/climb/mod.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fmt::{Error, Formatter};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `io::Read`, `io`
[INFO] [stdout]  --> src/climb/mod.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{io, io::Read};
[INFO] [stdout]   |           ^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::climb::print_tree`
[INFO] [stdout]  --> src/climb/tree_tools.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::climb::print_tree;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet`, `HashSet`
[INFO] [stdout]  --> src/climb/tree_tools.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::{BTreeSet, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error`, `io`
[INFO] [stdout]  --> src/climb/tree_tools.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::{error, io};
[INFO] [stdout]   |           ^^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/climb/tree_tools.rs:8:1
[INFO] [stdout]    |
[INFO] [stdout] 8  | / macro_rules! wrap_str_err {
[INFO] [stdout] 9  | |     ($st: expr) => {
[INFO] [stdout] 10 | |         $st.map_err(|e| format!("{}", e))?
[INFO] [stdout] 11 | |     };
[INFO] [stdout] 12 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tree_tools::get_ancestors_match_re`
[INFO] [stdout]   --> src/climb/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use tree_tools::get_ancestors_match_re;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `climb`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "0d0a21eb9afe2f9e8967c04c948025330a1403bd977e24209bd617203d7a68b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d0a21eb9afe2f9e8967c04c948025330a1403bd977e24209bd617203d7a68b2", kill_on_drop: false }`
[INFO] [stdout] 0d0a21eb9afe2f9e8967c04c948025330a1403bd977e24209bd617203d7a68b2