[INFO] fetching crate theban_interval_tree 0.7.1...
[INFO] checking theban_interval_tree-0.7.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate theban_interval_tree 0.7.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate theban_interval_tree 0.7.1 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate theban_interval_tree 0.7.1
[INFO] finished tweaking crates.io crate theban_interval_tree 0.7.1
[INFO] tweaked toml for crates.io crate theban_interval_tree 0.7.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 15 packages
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding time v0.1.45 (latest: v0.3.34)
[INFO] [stderr]       Adding wasi v0.10.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memrange v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79d838994992d08cf98aba3863bf08b2fb2b3399db04a78974c006c987b6e8e7
[INFO] running `Command { std: "docker" "start" "-a" "79d838994992d08cf98aba3863bf08b2fb2b3399db04a78974c006c987b6e8e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79d838994992d08cf98aba3863bf08b2fb2b3399db04a78974c006c987b6e8e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79d838994992d08cf98aba3863bf08b2fb2b3399db04a78974c006c987b6e8e7", kill_on_drop: false }`
[INFO] [stdout] 79d838994992d08cf98aba3863bf08b2fb2b3399db04a78974c006c987b6e8e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ba8fa3cbe721bdda27172067498c6a84886ba81dc1c8b67f267c2724bb6cbca
[INFO] running `Command { std: "docker" "start" "-a" "1ba8fa3cbe721bdda27172067498c6a84886ba81dc1c8b67f267c2724bb6cbca", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking memrange v0.1.3
[INFO] [stderr]     Checking theban_interval_tree v0.7.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `memrange` is imported redundantly
[INFO] [stdout]    --> src/tree.rs:224:10
[INFO] [stdout]     |
[INFO] [stdout] 224 |     use {memrange, rand};
[INFO] [stdout]     |          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:2:1
[INFO] [stdout]     |
[INFO] [stdout] 2   | extern crate memrange;
[INFO] [stdout]     | ---------------------- the item `memrange` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]    --> src/tree.rs:224:20
[INFO] [stdout]     |
[INFO] [stdout] 224 |     use {memrange, rand};
[INFO] [stdout]     |                    ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:1:1
[INFO] [stdout]     |
[INFO] [stdout] 1   | extern crate rand;
[INFO] [stdout]     | ------------------ the item `rand` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.98s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: memrange v0.1.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "1ba8fa3cbe721bdda27172067498c6a84886ba81dc1c8b67f267c2724bb6cbca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ba8fa3cbe721bdda27172067498c6a84886ba81dc1c8b67f267c2724bb6cbca", kill_on_drop: false }`
[INFO] [stdout] 1ba8fa3cbe721bdda27172067498c6a84886ba81dc1c8b67f267c2724bb6cbca
[INFO] checking theban_interval_tree-0.7.1 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate theban_interval_tree 0.7.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate theban_interval_tree 0.7.1 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate theban_interval_tree 0.7.1
[INFO] finished tweaking crates.io crate theban_interval_tree 0.7.1
[INFO] tweaked toml for crates.io crate theban_interval_tree 0.7.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f130dd2c374c3fc5cfdd757cf106c3a47f33fe4fe3a15ff75d48b1c3b539c59
[INFO] running `Command { std: "docker" "start" "-a" "5f130dd2c374c3fc5cfdd757cf106c3a47f33fe4fe3a15ff75d48b1c3b539c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f130dd2c374c3fc5cfdd757cf106c3a47f33fe4fe3a15ff75d48b1c3b539c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f130dd2c374c3fc5cfdd757cf106c3a47f33fe4fe3a15ff75d48b1c3b539c59", kill_on_drop: false }`
[INFO] [stdout] 5f130dd2c374c3fc5cfdd757cf106c3a47f33fe4fe3a15ff75d48b1c3b539c59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08de0e65106c8db6edb86a3eb7c11bedcebccf9236751583129625b32d6068b1
[INFO] running `Command { std: "docker" "start" "-a" "08de0e65106c8db6edb86a3eb7c11bedcebccf9236751583129625b32d6068b1", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking memrange v0.1.3
[INFO] [stderr]     Checking theban_interval_tree v0.7.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `memrange` is imported redundantly
[INFO] [stdout]    --> src/tree.rs:224:10
[INFO] [stdout]     |
[INFO] [stdout] 224 |     use {memrange, rand};
[INFO] [stdout]     |          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:2:1
[INFO] [stdout]     |
[INFO] [stdout] 2   | extern crate memrange;
[INFO] [stdout]     | ---------------------- the item `memrange` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]    --> src/tree.rs:224:20
[INFO] [stdout]     |
[INFO] [stdout] 224 |     use {memrange, rand};
[INFO] [stdout]     |                    ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:1:1
[INFO] [stdout]     |
[INFO] [stdout] 1   | extern crate rand;
[INFO] [stdout]     | ------------------ the item `rand` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.95s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: memrange v0.1.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "08de0e65106c8db6edb86a3eb7c11bedcebccf9236751583129625b32d6068b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08de0e65106c8db6edb86a3eb7c11bedcebccf9236751583129625b32d6068b1", kill_on_drop: false }`
[INFO] [stdout] 08de0e65106c8db6edb86a3eb7c11bedcebccf9236751583129625b32d6068b1