[INFO] cloning repository https://github.com/pkoenig10/piqc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pkoenig10/piqc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkoenig10%2Fpiqc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkoenig10%2Fpiqc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a074d539397ca9a597eddd69f8e6511ca9947c35
[INFO] checking pkoenig10/piqc against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkoenig10%2Fpiqc" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pkoenig10/piqc 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 git repo https://github.com/pkoenig10/piqc
[INFO] finished tweaking git repo https://github.com/pkoenig10/piqc
[INFO] tweaked toml for git repo https://github.com/pkoenig10/piqc written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pkoenig10/piqc 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 string_cache_codegen v0.4.0
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[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] 7c71edf09dd259c74ba026351b0843c63efb13be1dd05e829f1bd28d54d20936
[INFO] running `Command { std: "docker" "start" "-a" "7c71edf09dd259c74ba026351b0843c63efb13be1dd05e829f1bd28d54d20936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c71edf09dd259c74ba026351b0843c63efb13be1dd05e829f1bd28d54d20936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c71edf09dd259c74ba026351b0843c63efb13be1dd05e829f1bd28d54d20936", kill_on_drop: false }`
[INFO] [stdout] 7c71edf09dd259c74ba026351b0843c63efb13be1dd05e829f1bd28d54d20936
[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] 1d22d36fb61bb9dab8ba070e07e596d93d8ea2e7c12d2981186eeb9a534c43db
[INFO] running `Command { std: "docker" "start" "-a" "1d22d36fb61bb9dab8ba070e07e596d93d8ea2e7c12d2981186eeb9a534c43db", kill_on_drop: false }`
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[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling siphasher v0.2.2
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]    Compiling serde v1.0.37
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling debug_unreachable v0.1.1
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling either v1.1.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.0
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling bit-vec v0.5.0
[INFO] [stderr]    Compiling fixedbitset v0.1.7
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling bit-set v0.5.0
[INFO] [stderr]    Compiling block-buffer v0.7.0
[INFO] [stderr]    Compiling string_cache v0.7.1
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]    Compiling diff v0.1.10
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]    Compiling docopt v1.0.2
[INFO] [stderr]    Compiling lalrpop v0.16.3
[INFO] [stderr]    Compiling piqc v0.0.0 (/opt/rustwide/workdir/piqc)
[INFO] [stdout] warning: the item `fmt` is imported redundantly
[INFO] [stdout]  --> piqc/src/ir/func.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::ir::*;
[INFO] [stdout]   |     ------------ the item `fmt` is already imported here
[INFO] [stdout] 3 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fmt` is imported redundantly
[INFO] [stdout]  --> piqc/src/ir/inst.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::ir::*;
[INFO] [stdout]   |     ------------ the item `fmt` is already imported here
[INFO] [stdout] 2 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]   --> piqc/src/ir/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use self::inst::InstData;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the name `InstData` in the type namespace is supposed to be publicly re-exported here
[INFO] [stdout]   --> piqc/src/ir/mod.rs:9:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub use self::inst::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]   --> piqc/src/ir/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use self::inst::InstData;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fmt` is imported redundantly
[INFO] [stdout]  --> piqc/src/ir/func.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::ir::*;
[INFO] [stdout]   |     ------------ the item `fmt` is already imported here
[INFO] [stdout] 3 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fmt` is imported redundantly
[INFO] [stdout]  --> piqc/src/ir/inst.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::ir::*;
[INFO] [stdout]   |     ------------ the item `fmt` is already imported here
[INFO] [stdout] 2 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]   --> piqc/src/ir/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use self::inst::InstData;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the name `InstData` in the type namespace is supposed to be publicly re-exported here
[INFO] [stdout]   --> piqc/src/ir/mod.rs:9:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub use self::inst::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]   --> piqc/src/ir/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use self::inst::InstData;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]   --> piqc/src/ast/func.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Func {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 23 |     span: Span,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Func` 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: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> piqc/src/ir/func.rs:63:26
[INFO] [stdout]    |
[INFO] [stdout] 63 |             "Instruction {} already has result",
[INFO] [stdout]    |                          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 63 |             "Instruction {} already has result", ...,
[INFO] [stdout]    |                                                +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 63 |             "{}", "Instruction {} already has result",
[INFO] [stdout]    |             +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]   --> piqc/src/ast/func.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Func {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 23 |     span: Span,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Func` 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: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> piqc/src/ir/func.rs:63:26
[INFO] [stdout]    |
[INFO] [stdout] 63 |             "Instruction {} already has result",
[INFO] [stdout]    |                          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 63 |             "Instruction {} already has result", ...,
[INFO] [stdout]    |                                                +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 63 |             "{}", "Instruction {} already has result",
[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 37.47s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: lalrpop v0.16.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 7`
[INFO] running `Command { std: "docker" "inspect" "1d22d36fb61bb9dab8ba070e07e596d93d8ea2e7c12d2981186eeb9a534c43db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d22d36fb61bb9dab8ba070e07e596d93d8ea2e7c12d2981186eeb9a534c43db", kill_on_drop: false }`
[INFO] [stdout] 1d22d36fb61bb9dab8ba070e07e596d93d8ea2e7c12d2981186eeb9a534c43db