[INFO] fetching crate dxrs 0.0.1...
[INFO] checking dxrs-0.0.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate dxrs 0.0.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate dxrs 0.0.1 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 dxrs 0.0.1
[INFO] finished tweaking crates.io crate dxrs 0.0.1
[INFO] tweaked toml for crates.io crate dxrs 0.0.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate dxrs 0.0.1 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 17d97a069fdc417deba78e6a29e67b43c7ba310381acce36bdab548bd683eabe
[INFO] running `Command { std: "docker" "start" "-a" "17d97a069fdc417deba78e6a29e67b43c7ba310381acce36bdab548bd683eabe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17d97a069fdc417deba78e6a29e67b43c7ba310381acce36bdab548bd683eabe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17d97a069fdc417deba78e6a29e67b43c7ba310381acce36bdab548bd683eabe", kill_on_drop: false }`
[INFO] [stdout] 17d97a069fdc417deba78e6a29e67b43c7ba310381acce36bdab548bd683eabe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 954c2322990ebe9e857f9994eb09af760b92f3c9cc6d20acba1804822c647e8d
[INFO] running `Command { std: "docker" "start" "-a" "954c2322990ebe9e857f9994eb09af760b92f3c9cc6d20acba1804822c647e8d", kill_on_drop: false }`
[INFO] [stderr]     Checking dxrs v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]     --> src/parse.rs:1184:10
[INFO] [stdout]      |
[INFO] [stdout] 1184 |         };
[INFO] [stdout]      |          ^ help: remove this semicolon
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]     --> src/parse.rs:1184:10
[INFO] [stdout]      |
[INFO] [stdout] 1184 |         };
[INFO] [stdout]      |          ^ help: remove this semicolon
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:615:12
[INFO] [stdout]     |
[INFO] [stdout] 615 |     fn new(mut chars: Chars<'a>) -> Self {
[INFO] [stdout]     |            ----^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]    --> src/parse.rs:793:14
[INFO] [stdout]     |
[INFO] [stdout] 793 |         fn f(iter: &CharIter, c: char) {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:615:12
[INFO] [stdout]     |
[INFO] [stdout] 615 |     fn new(mut chars: Chars<'a>) -> Self {
[INFO] [stdout]     |            ----^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `current` and `index` are never used
[INFO] [stdout]    --> src/parse.rs:630:8
[INFO] [stdout]     |
[INFO] [stdout] 613 | impl<'a> CharIter<'a> {
[INFO] [stdout]     | --------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 630 |     fn current(&self) -> Option<char> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 671 |     fn index(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f` is never used
[INFO] [stdout]    --> src/parse.rs:793:12
[INFO] [stdout]     |
[INFO] [stdout] 793 |         fn f(iter: &CharIter, c: char) {
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]    --> src/parse.rs:793:14
[INFO] [stdout]     |
[INFO] [stdout] 793 |         fn f(iter: &CharIter, c: char) {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `current` and `index` are never used
[INFO] [stdout]    --> src/parse.rs:630:8
[INFO] [stdout]     |
[INFO] [stdout] 613 | impl<'a> CharIter<'a> {
[INFO] [stdout]     | --------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 630 |     fn current(&self) -> Option<char> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 671 |     fn index(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f` is never used
[INFO] [stdout]    --> src/parse.rs:793:12
[INFO] [stdout]     |
[INFO] [stdout] 793 |         fn f(iter: &CharIter, c: char) {
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "954c2322990ebe9e857f9994eb09af760b92f3c9cc6d20acba1804822c647e8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "954c2322990ebe9e857f9994eb09af760b92f3c9cc6d20acba1804822c647e8d", kill_on_drop: false }`
[INFO] [stdout] 954c2322990ebe9e857f9994eb09af760b92f3c9cc6d20acba1804822c647e8d
[INFO] checking dxrs-0.0.1 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate dxrs 0.0.1 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate dxrs 0.0.1 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 dxrs 0.0.1
[INFO] finished tweaking crates.io crate dxrs 0.0.1
[INFO] tweaked toml for crates.io crate dxrs 0.0.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate dxrs 0.0.1 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 8ab1e5cec37822e36fc217179ec560b98dbc361fd2f587605ea3d8750650303e
[INFO] running `Command { std: "docker" "start" "-a" "8ab1e5cec37822e36fc217179ec560b98dbc361fd2f587605ea3d8750650303e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ab1e5cec37822e36fc217179ec560b98dbc361fd2f587605ea3d8750650303e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ab1e5cec37822e36fc217179ec560b98dbc361fd2f587605ea3d8750650303e", kill_on_drop: false }`
[INFO] [stdout] 8ab1e5cec37822e36fc217179ec560b98dbc361fd2f587605ea3d8750650303e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 807c4afea19607c292e05a9658866e3ea414ee23723dcd0c2201220591ed3a08
[INFO] running `Command { std: "docker" "start" "-a" "807c4afea19607c292e05a9658866e3ea414ee23723dcd0c2201220591ed3a08", kill_on_drop: false }`
[INFO] [stderr]     Checking dxrs v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]     --> src/parse.rs:1184:10
[INFO] [stdout]      |
[INFO] [stdout] 1184 |         };
[INFO] [stdout]      |          ^ help: remove this semicolon
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]     --> src/parse.rs:1184:10
[INFO] [stdout]      |
[INFO] [stdout] 1184 |         };
[INFO] [stdout]      |          ^ help: remove this semicolon
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:615:12
[INFO] [stdout]     |
[INFO] [stdout] 615 |     fn new(mut chars: Chars<'a>) -> Self {
[INFO] [stdout]     |            ----^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]    --> src/parse.rs:793:14
[INFO] [stdout]     |
[INFO] [stdout] 793 |         fn f(iter: &CharIter, c: char) {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:615:12
[INFO] [stdout]     |
[INFO] [stdout] 615 |     fn new(mut chars: Chars<'a>) -> Self {
[INFO] [stdout]     |            ----^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]    --> src/parse.rs:793:14
[INFO] [stdout]     |
[INFO] [stdout] 793 |         fn f(iter: &CharIter, c: char) {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `current` and `index` are never used
[INFO] [stdout]    --> src/parse.rs:630:8
[INFO] [stdout]     |
[INFO] [stdout] 613 | impl<'a> CharIter<'a> {
[INFO] [stdout]     | --------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 630 |     fn current(&self) -> Option<char> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 671 |     fn index(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f` is never used
[INFO] [stdout]    --> src/parse.rs:793:12
[INFO] [stdout]     |
[INFO] [stdout] 793 |         fn f(iter: &CharIter, c: char) {
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `current` and `index` are never used
[INFO] [stdout]    --> src/parse.rs:630:8
[INFO] [stdout]     |
[INFO] [stdout] 613 | impl<'a> CharIter<'a> {
[INFO] [stdout]     | --------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 630 |     fn current(&self) -> Option<char> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 671 |     fn index(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f` is never used
[INFO] [stdout]    --> src/parse.rs:793:12
[INFO] [stdout]     |
[INFO] [stdout] 793 |         fn f(iter: &CharIter, c: char) {
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "807c4afea19607c292e05a9658866e3ea414ee23723dcd0c2201220591ed3a08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "807c4afea19607c292e05a9658866e3ea414ee23723dcd0c2201220591ed3a08", kill_on_drop: false }`
[INFO] [stdout] 807c4afea19607c292e05a9658866e3ea414ee23723dcd0c2201220591ed3a08