[INFO] cloning repository https://github.com/wycats/gitpod-examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wycats/gitpod-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwycats%2Fgitpod-examples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwycats%2Fgitpod-examples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d9bc18f9cff27428735c5463d774046734607c1e
[INFO] checking wycats/gitpod-examples against try#901e6d56697c79b2e80df6a487b2318ec6f57ee3 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwycats%2Fgitpod-examples" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wycats/gitpod-examples on toolchain 901e6d56697c79b2e80df6a487b2318ec6f57ee3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wycats/gitpod-examples
[INFO] finished tweaking git repo https://github.com/wycats/gitpod-examples
[INFO] tweaked toml for git repo https://github.com/wycats/gitpod-examples written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wycats/gitpod-examples 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" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20e9d7093c497c3302a479c3e03330f23e59010ad01b541276575cf6e5b9f8ba
[INFO] running `Command { std: "docker" "start" "-a" "20e9d7093c497c3302a479c3e03330f23e59010ad01b541276575cf6e5b9f8ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20e9d7093c497c3302a479c3e03330f23e59010ad01b541276575cf6e5b9f8ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20e9d7093c497c3302a479c3e03330f23e59010ad01b541276575cf6e5b9f8ba", kill_on_drop: false }`
[INFO] [stdout] 20e9d7093c497c3302a479c3e03330f23e59010ad01b541276575cf6e5b9f8ba
[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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b50282b11c2130f88260722cdc9c4891ab59829c0e8401831144b83149140891
[INFO] running `Command { std: "docker" "start" "-a" "b50282b11c2130f88260722cdc9c4891ab59829c0e8401831144b83149140891", kill_on_drop: false }`
[INFO] [stderr]     Checking termcolor v0.3.6
[INFO] [stderr]     Checking typed-arena v1.7.0
[INFO] [stderr]     Checking pretty v0.6.0
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pretty-0.6.0/src/lib.rs:691:9
[INFO] [stdout]     |
[INFO] [stdout] 691 | /         RefDoc(match doc {
[INFO] [stdout] 692 | |             // Return 'static references for common variants to avoid some allocations
[INFO] [stdout] 693 | |             Doc::Nil => &Doc::Nil,
[INFO] [stdout]     | |                          -------- temporary value created here
[INFO] [stdout] 694 | |             Doc::Space => &Doc::Space,
[INFO] [stdout] ...   |
[INFO] [stdout] 699 | |             _ => Arena::alloc(self, doc),
[INFO] [stdout] 700 | |         })
[INFO] [stdout]     | |__________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pretty-0.6.0/src/lib.rs:691:9
[INFO] [stdout]     |
[INFO] [stdout] 691 | /         RefDoc(match doc {
[INFO] [stdout] 692 | |             // Return 'static references for common variants to avoid some allocations
[INFO] [stdout] 693 | |             Doc::Nil => &Doc::Nil,
[INFO] [stdout] 694 | |             Doc::Space => &Doc::Space,
[INFO] [stdout]     | |                            ---------- temporary value created here
[INFO] [stdout] ...   |
[INFO] [stdout] 699 | |             _ => Arena::alloc(self, doc),
[INFO] [stdout] 700 | |         })
[INFO] [stdout]     | |__________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pretty-0.6.0/src/lib.rs:691:9
[INFO] [stdout]     |
[INFO] [stdout] 691 | /         RefDoc(match doc {
[INFO] [stdout] 692 | |             // Return 'static references for common variants to avoid some allocations
[INFO] [stdout] 693 | |             Doc::Nil => &Doc::Nil,
[INFO] [stdout] 694 | |             Doc::Space => &Doc::Space,
[INFO] [stdout] 695 | |             Doc::Newline => &Doc::Newline,
[INFO] [stdout]     | |                              ------------ temporary value created here
[INFO] [stdout] ...   |
[INFO] [stdout] 699 | |             _ => Arena::alloc(self, doc),
[INFO] [stdout] 700 | |         })
[INFO] [stdout]     | |__________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pretty-0.6.0/src/lib.rs:691:9
[INFO] [stdout]     |
[INFO] [stdout] 691 | /         RefDoc(match doc {
[INFO] [stdout] 692 | |             // Return 'static references for common variants to avoid some allocations
[INFO] [stdout] 693 | |             Doc::Nil => &Doc::Nil,
[INFO] [stdout] 694 | |             Doc::Space => &Doc::Space,
[INFO] [stdout] ...   |
[INFO] [stdout] 697 | |                 &Doc::FlatAlt(RefDoc(&Doc::Newline), RefDoc(&Doc::Nil))
[INFO] [stdout]     | |                  ------------------------------------------------------ temporary value created here
[INFO] [stdout] 698 | |             }
[INFO] [stdout] 699 | |             _ => Arena::alloc(self, doc),
[INFO] [stdout] 700 | |         })
[INFO] [stdout]     | |__________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pretty-0.6.0/src/lib.rs:691:9
[INFO] [stdout]     |
[INFO] [stdout] 691 | /         RefDoc(match doc {
[INFO] [stdout] 692 | |             // Return 'static references for common variants to avoid some allocations
[INFO] [stdout] 693 | |             Doc::Nil => &Doc::Nil,
[INFO] [stdout] 694 | |             Doc::Space => &Doc::Space,
[INFO] [stdout] ...   |
[INFO] [stdout] 697 | |                 &Doc::FlatAlt(RefDoc(&Doc::Newline), RefDoc(&Doc::Nil))
[INFO] [stdout]     | |                                                              -------- temporary value created here
[INFO] [stdout] 698 | |             }
[INFO] [stdout] 699 | |             _ => Arena::alloc(self, doc),
[INFO] [stdout] 700 | |         })
[INFO] [stdout]     | |__________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pretty-0.6.0/src/lib.rs:691:9
[INFO] [stdout]     |
[INFO] [stdout] 691 | /         RefDoc(match doc {
[INFO] [stdout] 692 | |             // Return 'static references for common variants to avoid some allocations
[INFO] [stdout] 693 | |             Doc::Nil => &Doc::Nil,
[INFO] [stdout] 694 | |             Doc::Space => &Doc::Space,
[INFO] [stdout] ...   |
[INFO] [stdout] 697 | |                 &Doc::FlatAlt(RefDoc(&Doc::Newline), RefDoc(&Doc::Nil))
[INFO] [stdout]     | |                                       ------------ temporary value created here
[INFO] [stdout] 698 | |             }
[INFO] [stdout] 699 | |             _ => Arena::alloc(self, doc),
[INFO] [stdout] 700 | |         })
[INFO] [stdout]     | |__________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pretty` (lib) due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "b50282b11c2130f88260722cdc9c4891ab59829c0e8401831144b83149140891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b50282b11c2130f88260722cdc9c4891ab59829c0e8401831144b83149140891", kill_on_drop: false }`
[INFO] [stdout] b50282b11c2130f88260722cdc9c4891ab59829c0e8401831144b83149140891