[INFO] fetching crate jmespath 0.3.0...
[INFO] checking jmespath-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate jmespath 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate jmespath 0.3.0 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 jmespath 0.3.0
[INFO] finished tweaking crates.io crate jmespath 0.3.0
[INFO] tweaked toml for crates.io crate jmespath 0.3.0 written to /workspace/builds/worker-4-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 23 packages
[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 slug v0.1.5
[INFO] [stderr]   Downloaded deunicode v1.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] a06b5cab93bbe71c86fe463ccd889260bb2873617f8688b18b4d9043b13af62c
[INFO] running `Command { std: "docker" "start" "-a" "a06b5cab93bbe71c86fe463ccd889260bb2873617f8688b18b4d9043b13af62c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a06b5cab93bbe71c86fe463ccd889260bb2873617f8688b18b4d9043b13af62c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a06b5cab93bbe71c86fe463ccd889260bb2873617f8688b18b4d9043b13af62c", kill_on_drop: false }`
[INFO] [stdout] a06b5cab93bbe71c86fe463ccd889260bb2873617f8688b18b4d9043b13af62c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f7a345bd5dcb4cfe7eb87e569d706dee293de5529551bdccfa881577be25fd8b
[INFO] running `Command { std: "docker" "start" "-a" "f7a345bd5dcb4cfe7eb87e569d706dee293de5529551bdccfa881577be25fd8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling ryu v1.0.17
[INFO] [stderr]    Compiling deunicode v1.4.3
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]    Compiling slug v0.1.5
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]    Compiling jmespath v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> src/variable.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::iter::Iterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]   --> src/variable.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::string::ToString;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToString` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Variable` is imported redundantly
[INFO] [stdout]    --> src/lexer.rs:313:9
[INFO] [stdout]     |
[INFO] [stdout] 312 |     use super::*;
[INFO] [stdout]     |         -------- the item `Variable` is already imported here
[INFO] [stdout] 313 |     use crate::variable::Variable;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rcvar` is imported redundantly
[INFO] [stdout]    --> src/lexer.rs:314:9
[INFO] [stdout]     |
[INFO] [stdout] 312 |     use super::*;
[INFO] [stdout]     |         -------- the item `Rcvar` is already imported here
[INFO] [stdout] 313 |     use crate::variable::Variable;
[INFO] [stdout] 314 |     use crate::Rcvar;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> src/variable.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::iter::Iterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]   --> src/variable.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::string::ToString;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToString` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ast` is imported redundantly
[INFO] [stdout]     --> src/variable.rs:1307:22
[INFO] [stdout]      |
[INFO] [stdout] 1306 |     use super::*;
[INFO] [stdout]      |         -------- the item `Ast` is already imported here
[INFO] [stdout] 1307 |     use crate::ast::{Ast, Comparator};
[INFO] [stdout]      |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Comparator` is imported redundantly
[INFO] [stdout]     --> src/variable.rs:1307:27
[INFO] [stdout]      |
[INFO] [stdout] 1306 |     use super::*;
[INFO] [stdout]      |         -------- the item `Comparator` is already imported here
[INFO] [stdout] 1307 |     use crate::ast::{Ast, Comparator};
[INFO] [stdout]      |                           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rcvar` is imported redundantly
[INFO] [stdout]     --> src/variable.rs:1308:9
[INFO] [stdout]      |
[INFO] [stdout] 1306 |     use super::*;
[INFO] [stdout]      |         -------- the item `Rcvar` is already imported here
[INFO] [stdout] 1307 |     use crate::ast::{Ast, Comparator};
[INFO] [stdout] 1308 |     use crate::Rcvar;
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]     --> src/variable.rs:1309:22
[INFO] [stdout]      |
[INFO] [stdout] 1309 |     use serde_json::{self, Number, Value};
[INFO] [stdout]      |                      ^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Number` is imported redundantly
[INFO] [stdout]     --> src/variable.rs:1309:28
[INFO] [stdout]      |
[INFO] [stdout] 1306 |     use super::*;
[INFO] [stdout]      |         -------- the item `Number` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 1309 |     use serde_json::{self, Number, Value};
[INFO] [stdout]      |                            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Value` is imported redundantly
[INFO] [stdout]     --> src/variable.rs:1309:36
[INFO] [stdout]      |
[INFO] [stdout] 1306 |     use super::*;
[INFO] [stdout]      |         -------- the item `Value` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 1309 |     use serde_json::{self, Number, Value};
[INFO] [stdout]      |                                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BTreeMap` is imported redundantly
[INFO] [stdout]     --> src/variable.rs:1310:9
[INFO] [stdout]      |
[INFO] [stdout] 1306 |     use super::*;
[INFO] [stdout]      |         -------- the item `BTreeMap` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 1310 |     use std::collections::BTreeMap;
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ast` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:464:9
[INFO] [stdout]     |
[INFO] [stdout] 464 |     use super::ast::Ast;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 465 |     use super::*;
[INFO] [stdout]     |         -------- the item `Ast` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.21s
[INFO] running `Command { std: "docker" "inspect" "f7a345bd5dcb4cfe7eb87e569d706dee293de5529551bdccfa881577be25fd8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7a345bd5dcb4cfe7eb87e569d706dee293de5529551bdccfa881577be25fd8b", kill_on_drop: false }`
[INFO] [stdout] f7a345bd5dcb4cfe7eb87e569d706dee293de5529551bdccfa881577be25fd8b