[INFO] fetching crate modus-lib 0.1.15...
[INFO] checking modus-lib-0.1.15 against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-150727
[INFO] extracting crate modus-lib 0.1.15 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate modus-lib 0.1.15
[INFO] finished tweaking crates.io crate modus-lib 0.1.15
[INFO] tweaked toml for crates.io crate modus-lib 0.1.15 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate modus-lib 0.1.15 on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "8db391f72fa85ee1e8d0b79f626d899c47b436b7ae85a04d0de95d24d15bda59", kill_on_drop: false }`
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[INFO] [stderr]     Checking modus-lib v0.1.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Clause`, `IRTerm`, and `Predicate`
[INFO] [stdout]   --> src/builtin.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     logic::{Clause, IRTerm, Literal, Predicate},
[INFO] [stdout]    |             ^^^^^^  ^^^^^^           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Op`
[INFO] [stdout]    --> src/builtin.rs:288:30
[INFO] [stdout]     |
[INFO] [stdout] 288 |     use semver::{Comparator, Op, Version};
[INFO] [stdout]     |                              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]   --> src/imagegen.rs:19:23
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::path::{Path, PathBuf};
[INFO] [stdout]    |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ResolutionError`
[INFO] [stdout]   --> src/imagegen.rs:24:41
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crate::sld::{self, ClauseId, Proof, ResolutionError};
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ClauseId`, `IRTerm`, `Image`, `Literal`, `NodeId`, `Predicate`, `ResolutionError`, `Run`, `Tree`, `self`, and `self`
[INFO] [stdout]   --> src/transpiler.rs:22:30
[INFO] [stdout]    |
[INFO] [stdout] 22 |     dockerfile::{Dockerfile, Image, Instruction, ResolvedDockerfile, ResolvedParent, Run},
[INFO] [stdout]    |                              ^^^^^                                                   ^^^
[INFO] [stdout] 23 |     imagegen::{self, BuildPlan, MergeNode, NodeId},
[INFO] [stdout]    |                                            ^^^^^^
[INFO] [stdout] 24 |     logic::{self, Clause, IRTerm, Literal, Predicate},
[INFO] [stdout]    |             ^^^^          ^^^^^^  ^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 25 |     modusfile::{self, Modusfile},
[INFO] [stdout] 26 |     sld::{self, ClauseId, ResolutionError, SLDResult, Tree},
[INFO] [stdout]    |           ^^^^  ^^^^^^^^  ^^^^^^^^^^^^^^^             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Predicate`
[INFO] [stdout]   --> src/unification.rs:20:46
[INFO] [stdout]    |
[INFO] [stdout] 20 | use logic::{Clause, Ground, IRTerm, Literal, Predicate};
[INFO] [stdout]    |                                              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Clause`, `IRTerm`, and `Predicate`
[INFO] [stdout]   --> src/builtin.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     logic::{Clause, IRTerm, Literal, Predicate},
[INFO] [stdout]    |             ^^^^^^  ^^^^^^           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Op`
[INFO] [stdout]    --> src/builtin.rs:288:30
[INFO] [stdout]     |
[INFO] [stdout] 288 |     use semver::{Comparator, Op, Version};
[INFO] [stdout]     |                              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]   --> src/imagegen.rs:19:23
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::path::{Path, PathBuf};
[INFO] [stdout]    |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ResolutionError`
[INFO] [stdout]   --> src/imagegen.rs:24:41
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crate::sld::{self, ClauseId, Proof, ResolutionError};
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FormatStringFragment`, `ModusTerm`, and `logic::SpannedPosition`
[INFO] [stdout]     --> src/sld.rs:1224:9
[INFO] [stdout]      |
[INFO] [stdout] 1224 |         logic::SpannedPosition,
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 1225 |         modusfile::{Expression, FormatStringFragment, ModusTerm},
[INFO] [stdout]      |                                 ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ClauseId`, `IRTerm`, `Image`, `Literal`, `NodeId`, `Predicate`, `ResolutionError`, `Run`, `Tree`, `self`, and `self`
[INFO] [stdout]   --> src/transpiler.rs:22:30
[INFO] [stdout]    |
[INFO] [stdout] 22 |     dockerfile::{Dockerfile, Image, Instruction, ResolvedDockerfile, ResolvedParent, Run},
[INFO] [stdout]    |                              ^^^^^                                                   ^^^
[INFO] [stdout] 23 |     imagegen::{self, BuildPlan, MergeNode, NodeId},
[INFO] [stdout]    |                                            ^^^^^^
[INFO] [stdout] 24 |     logic::{self, Clause, IRTerm, Literal, Predicate},
[INFO] [stdout]    |             ^^^^          ^^^^^^  ^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 25 |     modusfile::{self, Modusfile},
[INFO] [stdout] 26 |     sld::{self, ClauseId, ResolutionError, SLDResult, Tree},
[INFO] [stdout]    |           ^^^^  ^^^^^^^^  ^^^^^^^^^^^^^^^             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Predicate`
[INFO] [stdout]   --> src/unification.rs:20:46
[INFO] [stdout]    |
[INFO] [stdout] 20 | use logic::{Clause, Ground, IRTerm, Literal, Predicate};
[INFO] [stdout]    |                                              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/transpiler.rs:203:45
[INFO] [stdout]     |
[INFO] [stdout] 203 |                 BuildNode::AppendEnvValue { parent, key, value } => {
[INFO] [stdout]     |                                             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/transpiler.rs:203:53
[INFO] [stdout]     |
[INFO] [stdout] 203 |                 BuildNode::AppendEnvValue { parent, key, value } => {
[INFO] [stdout]     |                                                     ^^^ help: try ignoring the field: `key: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/transpiler.rs:203:58
[INFO] [stdout]     |
[INFO] [stdout] 203 |                 BuildNode::AppendEnvValue { parent, key, value } => {
[INFO] [stdout]     |                                                          ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clauses`
[INFO] [stdout]   --> src/wellformed.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     clauses: &Vec<Clause<IRTerm>>,
[INFO] [stdout]    |     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_clauses`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/wellformed.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut errors: HashSet<Signature> = HashSet::new();
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signatures`
[INFO] [stdout]   --> src/wellformed.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let signatures: HashSet<Signature> = clauses.iter().map(|c| c.head.signature()).collect();
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signatures`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `GoalId` is never used
[INFO] [stdout]   --> src/sld.rs:47:6
[INFO] [stdout]    |
[INFO] [stdout] 47 | type GoalId = usize;
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/sld.rs:268:42
[INFO] [stdout]     |
[INFO] [stdout] 268 |     fn edges(&'a self) -> dot::Edges<'a, Ed> {
[INFO] [stdout]     |               --                     --  ^^ the same lifetime is hidden here
[INFO] [stdout]     |               |                      |
[INFO] [stdout]     |               |                      the same lifetime is named here
[INFO] [stdout]     |               the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 268 |     fn edges(&'a self) -> dot::Edges<'a, Ed<'a>> {
[INFO] [stdout]     |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/sld.rs:281:43
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn source(&'a self, edge: &Ed<'a>) -> Nd {
[INFO] [stdout]     |                --                 --      ^^ the same lifetime is hidden here
[INFO] [stdout]     |                |                  |
[INFO] [stdout]     |                |                  the lifetime is named here
[INFO] [stdout]     |                the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn source(&'a self, edge: &Ed<'a>) -> Nd<'a> {
[INFO] [stdout]     |                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/sld.rs:285:43
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn target(&'a self, edge: &Ed<'a>) -> Nd {
[INFO] [stdout]     |                --                 --      ^^ the same lifetime is hidden here
[INFO] [stdout]     |                |                  |
[INFO] [stdout]     |                |                  the lifetime is named here
[INFO] [stdout]     |                the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn target(&'a self, edge: &Ed<'a>) -> Nd<'a> {
[INFO] [stdout]     |                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/transpiler.rs:203:45
[INFO] [stdout]     |
[INFO] [stdout] 203 |                 BuildNode::AppendEnvValue { parent, key, value } => {
[INFO] [stdout]     |                                             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/transpiler.rs:203:53
[INFO] [stdout]     |
[INFO] [stdout] 203 |                 BuildNode::AppendEnvValue { parent, key, value } => {
[INFO] [stdout]     |                                                     ^^^ help: try ignoring the field: `key: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/transpiler.rs:203:58
[INFO] [stdout]     |
[INFO] [stdout] 203 |                 BuildNode::AppendEnvValue { parent, key, value } => {
[INFO] [stdout]     |                                                          ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clauses`
[INFO] [stdout]   --> src/wellformed.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     clauses: &Vec<Clause<IRTerm>>,
[INFO] [stdout]    |     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_clauses`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/wellformed.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut errors: HashSet<Signature> = HashSet::new();
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signatures`
[INFO] [stdout]   --> src/wellformed.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let signatures: HashSet<Signature> = clauses.iter().map(|c| c.head.signature()).collect();
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signatures`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `GoalId` is never used
[INFO] [stdout]   --> src/sld.rs:47:6
[INFO] [stdout]    |
[INFO] [stdout] 47 | type GoalId = usize;
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/sld.rs:268:42
[INFO] [stdout]     |
[INFO] [stdout] 268 |     fn edges(&'a self) -> dot::Edges<'a, Ed> {
[INFO] [stdout]     |               --                     --  ^^ the same lifetime is hidden here
[INFO] [stdout]     |               |                      |
[INFO] [stdout]     |               |                      the same lifetime is named here
[INFO] [stdout]     |               the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 268 |     fn edges(&'a self) -> dot::Edges<'a, Ed<'a>> {
[INFO] [stdout]     |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/sld.rs:281:43
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn source(&'a self, edge: &Ed<'a>) -> Nd {
[INFO] [stdout]     |                --                 --      ^^ the same lifetime is hidden here
[INFO] [stdout]     |                |                  |
[INFO] [stdout]     |                |                  the lifetime is named here
[INFO] [stdout]     |                the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn source(&'a self, edge: &Ed<'a>) -> Nd<'a> {
[INFO] [stdout]     |                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/sld.rs:285:43
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn target(&'a self, edge: &Ed<'a>) -> Nd {
[INFO] [stdout]     |                --                 --      ^^ the same lifetime is hidden here
[INFO] [stdout]     |                |                  |
[INFO] [stdout]     |                |                  the lifetime is named here
[INFO] [stdout]     |                the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn target(&'a self, edge: &Ed<'a>) -> Nd<'a> {
[INFO] [stdout]     |                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.48s
[INFO] running `Command { std: "docker" "inspect" "8db391f72fa85ee1e8d0b79f626d899c47b436b7ae85a04d0de95d24d15bda59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8db391f72fa85ee1e8d0b79f626d899c47b436b7ae85a04d0de95d24d15bda59", kill_on_drop: false }`
[INFO] [stdout] 8db391f72fa85ee1e8d0b79f626d899c47b436b7ae85a04d0de95d24d15bda59
