[INFO] fetching crate crepe 0.1.8...
[INFO] checking crepe-0.1.8 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate crepe 0.1.8 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate crepe 0.1.8 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 crepe 0.1.8
[INFO] finished tweaking crates.io crate crepe 0.1.8
[INFO] tweaked toml for crates.io crate crepe 0.1.8 written to /workspace/builds/worker-3-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 84 packages
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[INFO] [stderr]       Adding os_str_bytes v6.6.1 (latest: v7.0.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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 trybuild v1.0.91
[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] 08a72bb9eb12bf27823bb83063e97cbf98f1048caf90450fa6809e430b7de2a2
[INFO] running `Command { std: "docker" "start" "-a" "08a72bb9eb12bf27823bb83063e97cbf98f1048caf90450fa6809e430b7de2a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08a72bb9eb12bf27823bb83063e97cbf98f1048caf90450fa6809e430b7de2a2", kill_on_drop: false }`
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[INFO] [stdout] 13d1a257db1363b80719644201fe046655fe416cf67b18cede8885155ee20bee
[INFO] running `Command { std: "docker" "start" "-a" "13d1a257db1363b80719644201fe046655fe416cf67b18cede8885155ee20bee", kill_on_drop: false }`
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[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
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[INFO] [stderr]     Checking crepe v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `paren_token` is never read
[INFO] [stdout]   --> src/parse.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct Relation {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub paren_token: token::Paren,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Relation` has a derived impl for the trait `Clone`, 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: fields `arrow_token` and `semi_token` are never read
[INFO] [stdout]    --> src/parse.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 98  | pub struct Rule {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 99  |     pub goal: Fact,
[INFO] [stdout] 100 |     pub arrow_token: Token![<-],
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 101 |     pub clauses: Punctuated<Clause, Token![,]>,
[INFO] [stdout] 102 |     pub semi_token: Token![;],
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Rule` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `paren_token` is never read
[INFO] [stdout]    --> src/parse.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub struct Fact {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 164 |     pub paren_token: token::Paren,
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Fact` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `for_token` and `in_token` are never read
[INFO] [stdout]    --> src/parse.rs:196:9
[INFO] [stdout]     |
[INFO] [stdout] 195 | pub struct For {
[INFO] [stdout]     |            --- fields in this struct
[INFO] [stdout] 196 |     pub for_token: Token![for],
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 197 |     pub pat: Pat,
[INFO] [stdout] 198 |     pub in_token: Token![in],
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `For` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stdout] warning: field `paren_token` is never read
[INFO] [stdout]   --> src/parse.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct Relation {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub paren_token: token::Paren,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Relation` has a derived impl for the trait `Clone`, 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: fields `arrow_token` and `semi_token` are never read
[INFO] [stdout]    --> src/parse.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 98  | pub struct Rule {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 99  |     pub goal: Fact,
[INFO] [stdout] 100 |     pub arrow_token: Token![<-],
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 101 |     pub clauses: Punctuated<Clause, Token![,]>,
[INFO] [stdout] 102 |     pub semi_token: Token![;],
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Rule` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `paren_token` is never read
[INFO] [stdout]    --> src/parse.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub struct Fact {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 164 |     pub paren_token: token::Paren,
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Fact` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `for_token` and `in_token` are never read
[INFO] [stdout]    --> src/parse.rs:196:9
[INFO] [stdout]     |
[INFO] [stdout] 195 | pub struct For {
[INFO] [stdout]     |            --- fields in this struct
[INFO] [stdout] 196 |     pub for_token: Token![for],
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 197 |     pub pat: Pat,
[INFO] [stdout] 198 |     pub in_token: Token![in],
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `For` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking toml_edit v0.22.9
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stderr]     Checking toml v0.8.12
[INFO] [stdout] warning: struct `Intermediate` is never constructed
[INFO] [stdout]   --> tests/test_parse.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |         struct Intermediate(i32, u64, char);
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Test` is never constructed
[INFO] [stdout]   --> tests/test_parse.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |         struct Test<'a>(&'a i32);
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Unit` is never constructed
[INFO] [stdout]   --> tests/test_parse.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |         struct Unit();
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tc` is never constructed
[INFO] [stdout]   --> tests/test_parse.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 |         struct Tc(i32, i32);
[INFO] [stdout]    |                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> tests/test_parse.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |         struct Node(i32);
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `paren_token` is never read
[INFO] [stdout]   --> src/parse.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct Relation {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub paren_token: token::Paren,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Relation` has a derived impl for the trait `Clone`, 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: fields `arrow_token` and `semi_token` are never read
[INFO] [stdout]    --> src/parse.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 98  | pub struct Rule {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 99  |     pub goal: Fact,
[INFO] [stdout] 100 |     pub arrow_token: Token![<-],
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 101 |     pub clauses: Punctuated<Clause, Token![,]>,
[INFO] [stdout] 102 |     pub semi_token: Token![;],
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Rule` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `paren_token` is never read
[INFO] [stdout]    --> src/parse.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub struct Fact {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 164 |     pub paren_token: token::Paren,
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Fact` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `for_token` and `in_token` are never read
[INFO] [stdout]    --> src/parse.rs:196:9
[INFO] [stdout]     |
[INFO] [stdout] 195 | pub struct For {
[INFO] [stdout]     |            --- fields in this struct
[INFO] [stdout] 196 |     pub for_token: Token![for],
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 197 |     pub pat: Pat,
[INFO] [stdout] 198 |     pub in_token: Token![in],
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `For` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.77s
[INFO] running `Command { std: "docker" "inspect" "13d1a257db1363b80719644201fe046655fe416cf67b18cede8885155ee20bee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13d1a257db1363b80719644201fe046655fe416cf67b18cede8885155ee20bee", kill_on_drop: false }`
[INFO] [stdout] 13d1a257db1363b80719644201fe046655fe416cf67b18cede8885155ee20bee