[INFO] fetching crate prevmark 0.1.0...
[INFO] checking prevmark-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate prevmark 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate prevmark 0.1.0 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 prevmark 0.1.0
[INFO] finished tweaking crates.io crate prevmark 0.1.0
[INFO] tweaked toml for crates.io crate prevmark 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate prevmark 0.1.0 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]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1af50c72e50341121518d857505dbb0f1cf8535463aa50148e94e25e83814e4b
[INFO] running `Command { std: "docker" "start" "-a" "1af50c72e50341121518d857505dbb0f1cf8535463aa50148e94e25e83814e4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1af50c72e50341121518d857505dbb0f1cf8535463aa50148e94e25e83814e4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1af50c72e50341121518d857505dbb0f1cf8535463aa50148e94e25e83814e4b", kill_on_drop: false }`
[INFO] [stdout] 1af50c72e50341121518d857505dbb0f1cf8535463aa50148e94e25e83814e4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ad13139a1b062d4d78f9c15f747a5defe7bc9de15a11e305e6ee13d9dd54d70d
[INFO] running `Command { std: "docker" "start" "-a" "ad13139a1b062d4d78f9c15f747a5defe7bc9de15a11e305e6ee13d9dd54d70d", kill_on_drop: false }`
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[INFO] [stderr]     Checking copypasta v0.7.1
[INFO] [stderr]     Checking servo-fontconfig v0.5.1
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]     Checking string_cache v0.8.2
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.4
[INFO] [stderr]    Compiling sixtyfps-rendering-backend-default v0.1.5
[INFO] [stderr]     Checking cpp v0.5.6
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling sixtyfps-macros v0.1.5
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking thin-slice v0.1.1
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]     Checking os_str_bytes v4.2.0
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.5
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking ego-tree v0.6.2
[INFO] [stderr]     Checking ouroboros v0.12.0
[INFO] [stderr]     Checking femtovg v0.2.8
[INFO] [stderr]    Compiling num_enum v0.5.4
[INFO] [stderr]     Checking sixtyfps-corelib v0.1.5
[INFO] [stderr]     Checking clap v3.0.0-beta.5
[INFO] [stderr]     Checking scraper v0.12.0
[INFO] [stderr]     Checking sixtyfps-rendering-backend-gl v0.1.5
[INFO] [stderr]    Compiling sixtyfps-build v0.1.5
[INFO] [stderr]    Compiling prevmark v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking sixtyfps v0.1.5
[INFO] [stdout] warning: unused variable: `buffer_string`
[INFO] [stdout]   --> src/main.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let buffer_string = String::new();  // This string will be used as a buffer so that only when we
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer_string`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `color` is never read
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct TextProperties {
[INFO] [stdout]    |        -------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 14 |     color: sixtyfps::Color,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TextProperties` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]  --> /opt/rustwide/target/debug/build/prevmark-4d3d5980a2b67fd3/out/prevmark.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | ...e (sixtyfps :: re_exports :: FieldOffsets)] # [const_field_offset (sixtyfps :: re_exports :: const_field_offset)] # [repr (C)] # [pin_drop] pub struct InnerPrevMark {
[INFO] [stdout]   |       -------------------------------------- fields in this struct
[INFO] [stdout] 6 | ...ow : sixtyfps :: Window , r#root_1 : sixtyfps :: re_exports :: r#WindowItem , r#document_2 : sixtyfps :: re_exports :: r#NativeScrollView , r#fli_3 : sixtyfps :: re_exports :: r#Flickable , r#Images : sixtyfps :: re_exports :: Property < sixtyfps :: re_exports :: ModelHandle < sixtyfps :: re_exports :: SharedString > > , r#TextElements : sixtyfps :: re_exports :: Property < sixtyfps :: re_exports :: ModelHandle < r#TextElement > > , r#elements_length : sixtyfps :: re_exports :: Property < i32 > , r#min_height : sixtyfps :: re_exports :: Property < f32 > , r#min_width : sixtyfps :: re_exports :: Property < f32 > , r#preferred_height : sixtyfps :: re_exports :: Property < f32 > , r#preferred_width : sixtyfps :: re_exports :: Property < f32 > , repeater__6 : sixtyfps :: re_exports :: Repeater < InnerText_5 > , self_weak : sixtyfps :: re_exports :: OnceCell < sixtyfps :: re_exports :: VWeak < sixtyfps :: re_exports :: ComponentVTable , InnerPrevMark > > , global_NativeStyleMetrics : :: core :: pin :: Pin < :: std :: rc :: Rc < r#NativeStyleMetrics >> ...
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 6 |          window : () , r#root_1 : () , r#document_2 : () , r#fli_3 : () , r#Images : () , r#TextElements : () , r#elements_length : () , r#min_height : () , r#min_width : () , r#preferred_height : () , r#preferred_width : () , repeater__6 : () , self_weak : () , global_NativeStyleMetrics : () , }
[INFO] [stdout]   |                   ~~              ~~                  ~~             ~~              ~~                    ~~                       ~~                  ~~                 ~~                        ~~                       ~~                 ~~               ~~                               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buffer_string`
[INFO] [stdout]   --> src/main.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let buffer_string = String::new();  // This string will be used as a buffer so that only when we
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer_string`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `color` is never read
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct TextProperties {
[INFO] [stdout]    |        -------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 14 |     color: sixtyfps::Color,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TextProperties` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]  --> /opt/rustwide/target/debug/build/prevmark-4d3d5980a2b67fd3/out/prevmark.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | ...e (sixtyfps :: re_exports :: FieldOffsets)] # [const_field_offset (sixtyfps :: re_exports :: const_field_offset)] # [repr (C)] # [pin_drop] pub struct InnerPrevMark {
[INFO] [stdout]   |       -------------------------------------- fields in this struct
[INFO] [stdout] 6 | ...ow : sixtyfps :: Window , r#root_1 : sixtyfps :: re_exports :: r#WindowItem , r#document_2 : sixtyfps :: re_exports :: r#NativeScrollView , r#fli_3 : sixtyfps :: re_exports :: r#Flickable , r#Images : sixtyfps :: re_exports :: Property < sixtyfps :: re_exports :: ModelHandle < sixtyfps :: re_exports :: SharedString > > , r#TextElements : sixtyfps :: re_exports :: Property < sixtyfps :: re_exports :: ModelHandle < r#TextElement > > , r#elements_length : sixtyfps :: re_exports :: Property < i32 > , r#min_height : sixtyfps :: re_exports :: Property < f32 > , r#min_width : sixtyfps :: re_exports :: Property < f32 > , r#preferred_height : sixtyfps :: re_exports :: Property < f32 > , r#preferred_width : sixtyfps :: re_exports :: Property < f32 > , repeater__6 : sixtyfps :: re_exports :: Repeater < InnerText_5 > , self_weak : sixtyfps :: re_exports :: OnceCell < sixtyfps :: re_exports :: VWeak < sixtyfps :: re_exports :: ComponentVTable , InnerPrevMark > > , global_NativeStyleMetrics : :: core :: pin :: Pin < :: std :: rc :: Rc < r#NativeStyleMetrics >> ...
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 6 |          window : () , r#root_1 : () , r#document_2 : () , r#fli_3 : () , r#Images : () , r#TextElements : () , r#elements_length : () , r#min_height : () , r#min_width : () , r#preferred_height : () , r#preferred_width : () , repeater__6 : () , self_weak : () , global_NativeStyleMetrics : () , }
[INFO] [stdout]   |                   ~~              ~~                  ~~             ~~              ~~                    ~~                       ~~                  ~~                 ~~                        ~~                       ~~                 ~~               ~~                               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 14s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: html5ever v0.25.1, quick-xml v0.22.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "ad13139a1b062d4d78f9c15f747a5defe7bc9de15a11e305e6ee13d9dd54d70d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad13139a1b062d4d78f9c15f747a5defe7bc9de15a11e305e6ee13d9dd54d70d", kill_on_drop: false }`
[INFO] [stdout] ad13139a1b062d4d78f9c15f747a5defe7bc9de15a11e305e6ee13d9dd54d70d