[INFO] fetching crate icalendar 0.16.0...
[INFO] checking icalendar-0.16.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate icalendar 0.16.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate icalendar 0.16.0 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 icalendar 0.16.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate icalendar 0.16.0
[INFO] tweaked toml for crates.io crate icalendar 0.16.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate icalendar 0.16.0 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
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.190
[INFO] [stderr]   Downloaded serde_derive v1.0.190
[INFO] [stderr]   Downloaded iso8601 v0.6.1
[INFO] [stderr]   Downloaded windows-core v0.51.1
[INFO] [stderr]   Downloaded iana-time-zone v0.1.58
[INFO] [stderr]   Downloaded chrono-tz v0.8.4
[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] 950ce11edfb7cfb9819c0e4189885e94c0302cc8ba08ef39e6c8b168ba657936
[INFO] running `Command { std: "docker" "start" "-a" "950ce11edfb7cfb9819c0e4189885e94c0302cc8ba08ef39e6c8b168ba657936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "950ce11edfb7cfb9819c0e4189885e94c0302cc8ba08ef39e6c8b168ba657936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "950ce11edfb7cfb9819c0e4189885e94c0302cc8ba08ef39e6c8b168ba657936", kill_on_drop: false }`
[INFO] [stdout] 950ce11edfb7cfb9819c0e4189885e94c0302cc8ba08ef39e6c8b168ba657936
[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] ba32c3e4b1a56d892cdc1075431fac7b8d56112c06a0ab892383ac1597ba6be6
[INFO] running `Command { std: "docker" "start" "-a" "ba32c3e4b1a56d892cdc1075431fac7b8d56112c06a0ab892383ac1597ba6be6", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking iana-time-zone v0.1.58
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking uuid v1.5.0
[INFO] [stderr]     Checking chrono v0.4.31
[INFO] [stderr]     Checking iso8601 v0.6.1
[INFO] [stderr]     Checking icalendar v0.16.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> src/calendar.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{fmt, iter::FromIterator, mem, ops::Deref};
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/calendar.rs:235:18
[INFO] [stdout]     |
[INFO] [stdout] 235 |     type Error = std::fmt::Error;
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:67:5
[INFO] [stdout]     |
[INFO] [stdout] 67  |     unused_qualifications,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 235 -     type Error = std::fmt::Error;
[INFO] [stdout] 235 +     type Error = fmt::Error;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Parameter` is imported redundantly
[INFO] [stdout]    --> src/components/alarm.rs:285:29
[INFO] [stdout]     |
[INFO] [stdout] 285 |     use crate::components::{alarm::properties::Parameter, date_time::parse_duration};
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 286 |
[INFO] [stdout] 287 |     use super::*;
[INFO] [stdout]     |         -------- the item `Parameter` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `parse_utc_date_time` is imported redundantly
[INFO] [stdout]  --> src/components/todo.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::date_time::parse_utc_date_time;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `parse_utc_date_time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/components.rs:132:49
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn try_into_string(&self) -> Result<String, std::fmt::Error> {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 132 -     fn try_into_string(&self) -> Result<String, std::fmt::Error> {
[INFO] [stdout] 132 +     fn try_into_string(&self) -> Result<String, fmt::Error> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/parser/components.rs:173:27
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let from_parsed = crate::CalendarComponent::from(read_component(&unfold(s))?);
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 173 -         let from_parsed = crate::CalendarComponent::from(read_component(&unfold(s))?);
[INFO] [stdout] 173 +         let from_parsed = CalendarComponent::from(read_component(&unfold(s))?);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/parser/properties.rs:122:12
[INFO] [stdout]     |
[INFO] [stdout] 122 |         Ok(crate::parser::Property::try_from(s)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 122 -         Ok(crate::parser::Property::try_from(s)?.into())
[INFO] [stdout] 122 +         Ok(Property::try_from(s)?.into())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/properties.rs:159:18
[INFO] [stdout]     |
[INFO] [stdout] 159 |     type Error = std::fmt::Error;
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 159 -     type Error = std::fmt::Error;
[INFO] [stdout] 159 +     type Error = fmt::Error;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> src/calendar.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{fmt, iter::FromIterator, mem, ops::Deref};
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/calendar.rs:235:18
[INFO] [stdout]     |
[INFO] [stdout] 235 |     type Error = std::fmt::Error;
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:67:5
[INFO] [stdout]     |
[INFO] [stdout] 67  |     unused_qualifications,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 235 -     type Error = std::fmt::Error;
[INFO] [stdout] 235 +     type Error = fmt::Error;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/calendar.rs:282:16
[INFO] [stdout]     |
[INFO] [stdout] 282 |     let todo = crate::Todo::default();
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 282 -     let todo = crate::Todo::default();
[INFO] [stdout] 282 +     let todo = Todo::default();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Parameter` is imported redundantly
[INFO] [stdout]    --> src/components/alarm.rs:285:29
[INFO] [stdout]     |
[INFO] [stdout] 285 |     use crate::components::{alarm::properties::Parameter, date_time::parse_duration};
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 286 |
[INFO] [stdout] 287 |     use super::*;
[INFO] [stdout]     |         -------- the item `Parameter` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `parse_utc_date_time` is imported redundantly
[INFO] [stdout]  --> src/components/todo.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::date_time::parse_utc_date_time;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `parse_utc_date_time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/components.rs:132:49
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn try_into_string(&self) -> Result<String, std::fmt::Error> {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 132 -     fn try_into_string(&self) -> Result<String, std::fmt::Error> {
[INFO] [stdout] 132 +     fn try_into_string(&self) -> Result<String, fmt::Error> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/parser/components.rs:173:27
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let from_parsed = crate::CalendarComponent::from(read_component(&unfold(s))?);
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 173 -         let from_parsed = crate::CalendarComponent::from(read_component(&unfold(s))?);
[INFO] [stdout] 173 +         let from_parsed = CalendarComponent::from(read_component(&unfold(s))?);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/parser/properties.rs:122:12
[INFO] [stdout]     |
[INFO] [stdout] 122 |         Ok(crate::parser::Property::try_from(s)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 122 -         Ok(crate::parser::Property::try_from(s)?.into())
[INFO] [stdout] 122 +         Ok(Property::try_from(s)?.into())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/properties.rs:159:18
[INFO] [stdout]     |
[INFO] [stdout] 159 |     type Error = std::fmt::Error;
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 159 -     type Error = std::fmt::Error;
[INFO] [stdout] 159 +     type Error = fmt::Error;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> tests/try_into_string.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `parser` is imported redundantly
[INFO] [stdout]  --> examples/full_circle.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use icalendar::parser;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6 | use icalendar::*;
[INFO] [stdout]   |     ------------ the item `parser` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.35s
[INFO] running `Command { std: "docker" "inspect" "ba32c3e4b1a56d892cdc1075431fac7b8d56112c06a0ab892383ac1597ba6be6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba32c3e4b1a56d892cdc1075431fac7b8d56112c06a0ab892383ac1597ba6be6", kill_on_drop: false }`
[INFO] [stdout] ba32c3e4b1a56d892cdc1075431fac7b8d56112c06a0ab892383ac1597ba6be6