[INFO] fetching crate muncher 0.7.0...
[INFO] building muncher-0.7.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate muncher 0.7.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate muncher 0.7.0
[INFO] finished tweaking crates.io crate muncher 0.7.0
[INFO] tweaked toml for crates.io crate muncher 0.7.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate muncher 0.7.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 853c4acbcb72d0e0d03d9a4b1aae289a69828367a837d96cd825031f8e5250d9
[INFO] running `Command { std: "docker" "start" "-a" "853c4acbcb72d0e0d03d9a4b1aae289a69828367a837d96cd825031f8e5250d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "853c4acbcb72d0e0d03d9a4b1aae289a69828367a837d96cd825031f8e5250d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "853c4acbcb72d0e0d03d9a4b1aae289a69828367a837d96cd825031f8e5250d9", kill_on_drop: false }`
[INFO] [stdout] 853c4acbcb72d0e0d03d9a4b1aae289a69828367a837d96cd825031f8e5250d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 927645e0dd2faf823b1de73a36ffecaab451ebb8011c506863f11155818c461a
[INFO] running `Command { std: "docker" "start" "-a" "927645e0dd2faf823b1de73a36ffecaab451ebb8011c506863f11155818c461a", kill_on_drop: false }`
[INFO] [stderr]    Compiling muncher v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/muncher.rs:185:17
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn fork(&self) -> Fork {
[INFO] [stdout]     |                 ^^^^^     ^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided 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: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn fork(&self) -> Fork<'_> {
[INFO] [stdout]     |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/muncher.rs:200:24
[INFO] [stdout]     |
[INFO] [stdout] 200 |     pub fn brace_stack(&self) -> Stack {
[INFO] [stdout]     |                        ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 200 |     pub fn brace_stack(&self) -> Stack<'_> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `input` and `pos` are never read
[INFO] [stdout]   --> src/muncher.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Stack<'a> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 16 |     input: &'a str,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 17 |     stack: Vec<char>,
[INFO] [stdout] 18 |     pos: (usize, usize),
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Stack` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "927645e0dd2faf823b1de73a36ffecaab451ebb8011c506863f11155818c461a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "927645e0dd2faf823b1de73a36ffecaab451ebb8011c506863f11155818c461a", kill_on_drop: false }`
[INFO] [stdout] 927645e0dd2faf823b1de73a36ffecaab451ebb8011c506863f11155818c461a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6193ea78686076c93b4cc663ca608d78aa50d61a511ce1a58a718b88c3c4e59
[INFO] running `Command { std: "docker" "start" "-a" "a6193ea78686076c93b4cc663ca608d78aa50d61a511ce1a58a718b88c3c4e59", kill_on_drop: false }`
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/muncher.rs:185:17
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn fork(&self) -> Fork {
[INFO] [stdout]     |                 ^^^^^     ^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided 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: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn fork(&self) -> Fork<'_> {
[INFO] [stdout]     |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/muncher.rs:200:24
[INFO] [stdout]     |
[INFO] [stdout] 200 |     pub fn brace_stack(&self) -> Stack {
[INFO] [stdout]     |                        ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 200 |     pub fn brace_stack(&self) -> Stack<'_> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `input` and `pos` are never read
[INFO] [stdout]   --> src/muncher.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Stack<'a> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 16 |     input: &'a str,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 17 |     stack: Vec<char>,
[INFO] [stdout] 18 |     pos: (usize, usize),
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Stack` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling muncher v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/muncher.rs:185:17
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn fork(&self) -> Fork {
[INFO] [stdout]     |                 ^^^^^     ^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided 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: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn fork(&self) -> Fork<'_> {
[INFO] [stdout]     |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `input` and `pos` are never read
[INFO] [stdout]   --> src/muncher.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Stack<'a> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 16 |     input: &'a str,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 17 |     stack: Vec<char>,
[INFO] [stdout] 18 |     pos: (usize, usize),
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Stack` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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 elided elsewhere is confusing
[INFO] [stdout]    --> src/muncher.rs:200:24
[INFO] [stdout]     |
[INFO] [stdout] 200 |     pub fn brace_stack(&self) -> Stack {
[INFO] [stdout]     |                        ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 200 |     pub fn brace_stack(&self) -> Stack<'_> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "a6193ea78686076c93b4cc663ca608d78aa50d61a511ce1a58a718b88c3c4e59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6193ea78686076c93b4cc663ca608d78aa50d61a511ce1a58a718b88c3c4e59", kill_on_drop: false }`
[INFO] [stdout] a6193ea78686076c93b4cc663ca608d78aa50d61a511ce1a58a718b88c3c4e59