[INFO] fetching crate flg 0.1.0...
[INFO] testing flg-0.1.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate flg 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate flg 0.1.0
[INFO] finished tweaking crates.io crate flg 0.1.0
[INFO] tweaked toml for crates.io crate flg 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate flg 0.1.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate flg 0.1.0 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d2f589f68fd9b7df087da6690135c3313bfe7a86969e5d12614d5c321593adb
[INFO] running `Command { std: "docker" "start" "-a" "1d2f589f68fd9b7df087da6690135c3313bfe7a86969e5d12614d5c321593adb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d2f589f68fd9b7df087da6690135c3313bfe7a86969e5d12614d5c321593adb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d2f589f68fd9b7df087da6690135c3313bfe7a86969e5d12614d5c321593adb", kill_on_drop: false }`
[INFO] [stdout] 1d2f589f68fd9b7df087da6690135c3313bfe7a86969e5d12614d5c321593adb
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25b8fbf1b8d50dc5810ab150d1638f413d51a3dbe10ebbb0cb5c79466d0dfc4c
[INFO] running `Command { std: "docker" "start" "-a" "25b8fbf1b8d50dc5810ab150d1638f413d51a3dbe10ebbb0cb5c79466d0dfc4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling flg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BufRead`
[INFO] [stdout]   --> src/stackcollapse.rs:24:15
[INFO] [stdout]    |
[INFO] [stdout] 24 | use std::io::{BufRead, BufReader, Read};
[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 variable: `pc`
[INFO] [stdout]    --> src/stackcollapse.rs:204:35
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn try_nm_fallback(&mut self, pc: &str, rawfunc: &str, module: &str) -> Option<String> {
[INFO] [stdout]     |                                   ^^ help: if this is intentional, prefix it with an underscore: `_pc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stackcollapse.rs:414:9
[INFO] [stdout]     |
[INFO] [stdout] 414 |     let mut parts = rest.split_whitespace();
[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: struct `Stack` is never constructed
[INFO] [stdout]   --> src/stackcollapse.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Stack {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `with_all_annotations` is never used
[INFO] [stdout]   --> src/stackcollapse.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 81 | impl Options {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 82 |     /// Enable all annotations (kernel and JIT).
[INFO] [stdout] 83 |     pub fn with_all_annotations(mut self) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `collapse_perf_reader` is never used
[INFO] [stdout]    --> src/stackcollapse.rs:627:8
[INFO] [stdout]     |
[INFO] [stdout] 627 | pub fn collapse_perf_reader<R: Read>(reader: R, opts: &Options) -> CollapsedStacks {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `format_collapsed` is never used
[INFO] [stdout]    --> src/stackcollapse.rs:635:8
[INFO] [stdout]     |
[INFO] [stdout] 635 | pub fn format_collapsed(collapsed: &CollapsedStacks) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "25b8fbf1b8d50dc5810ab150d1638f413d51a3dbe10ebbb0cb5c79466d0dfc4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25b8fbf1b8d50dc5810ab150d1638f413d51a3dbe10ebbb0cb5c79466d0dfc4c", kill_on_drop: false }`
[INFO] [stdout] 25b8fbf1b8d50dc5810ab150d1638f413d51a3dbe10ebbb0cb5c79466d0dfc4c
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 427e39ee186cf7cdb6ebfeda169bd0d135158f9ef8b6c9ce537eacf3f3c8c605
[INFO] running `Command { std: "docker" "start" "-a" "427e39ee186cf7cdb6ebfeda169bd0d135158f9ef8b6c9ce537eacf3f3c8c605", kill_on_drop: false }`
[INFO] [stderr]    Compiling flg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BufRead`
[INFO] [stdout]   --> src/stackcollapse.rs:24:15
[INFO] [stdout]    |
[INFO] [stdout] 24 | use std::io::{BufRead, BufReader, Read};
[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 variable: `pc`
[INFO] [stdout]    --> src/stackcollapse.rs:204:35
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn try_nm_fallback(&mut self, pc: &str, rawfunc: &str, module: &str) -> Option<String> {
[INFO] [stdout]     |                                   ^^ help: if this is intentional, prefix it with an underscore: `_pc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stackcollapse.rs:414:9
[INFO] [stdout]     |
[INFO] [stdout] 414 |     let mut parts = rest.split_whitespace();
[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: struct `Stack` is never constructed
[INFO] [stdout]   --> src/stackcollapse.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Stack {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `with_all_annotations` is never used
[INFO] [stdout]   --> src/stackcollapse.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 81 | impl Options {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 82 |     /// Enable all annotations (kernel and JIT).
[INFO] [stdout] 83 |     pub fn with_all_annotations(mut self) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `collapse_perf_reader` is never used
[INFO] [stdout]    --> src/stackcollapse.rs:627:8
[INFO] [stdout]     |
[INFO] [stdout] 627 | pub fn collapse_perf_reader<R: Read>(reader: R, opts: &Options) -> CollapsedStacks {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "427e39ee186cf7cdb6ebfeda169bd0d135158f9ef8b6c9ce537eacf3f3c8c605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "427e39ee186cf7cdb6ebfeda169bd0d135158f9ef8b6c9ce537eacf3f3c8c605", kill_on_drop: false }`
[INFO] [stdout] 427e39ee186cf7cdb6ebfeda169bd0d135158f9ef8b6c9ce537eacf3f3c8c605
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 40bb833382db5aac1d91e11f925d5e1120fe978fb182e59b96cec7dba9f1e69a
[INFO] running `Command { std: "docker" "start" "-a" "40bb833382db5aac1d91e11f925d5e1120fe978fb182e59b96cec7dba9f1e69a", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `BufRead`
[INFO] [stderr]   --> src/stackcollapse.rs:24:15
[INFO] [stderr]    |
[INFO] [stderr] 24 | use std::io::{BufRead, BufReader, Read};
[INFO] [stderr]    |               ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pc`
[INFO] [stderr]    --> src/stackcollapse.rs:204:35
[INFO] [stderr]     |
[INFO] [stderr] 204 |     fn try_nm_fallback(&mut self, pc: &str, rawfunc: &str, module: &str) -> Option<String> {
[INFO] [stderr]     |                                   ^^ help: if this is intentional, prefix it with an underscore: `_pc`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/stackcollapse.rs:414:9
[INFO] [stderr]     |
[INFO] [stderr] 414 |     let mut parts = rest.split_whitespace();
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Stack` is never constructed
[INFO] [stderr]   --> src/stackcollapse.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub struct Stack {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `with_all_annotations` is never used
[INFO] [stderr]   --> src/stackcollapse.rs:83:12
[INFO] [stderr]    |
[INFO] [stderr] 81 | impl Options {
[INFO] [stderr]    | ------------ method in this implementation
[INFO] [stderr] 82 |     /// Enable all annotations (kernel and JIT).
[INFO] [stderr] 83 |     pub fn with_all_annotations(mut self) -> Self {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `collapse_perf_reader` is never used
[INFO] [stderr]    --> src/stackcollapse.rs:627:8
[INFO] [stderr]     |
[INFO] [stderr] 627 | pub fn collapse_perf_reader<R: Read>(reader: R, opts: &Options) -> CollapsedStacks {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `flg` (bin "flg" test) generated 6 warnings (run `cargo fix --bin "flg" -p flg --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/flg-452d3907fadcc40f)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test flamegraph::tests::test_empty_stacks ... ok
[INFO] [stdout] test flamegraph::tests::test_format_samples ... ok
[INFO] [stdout] test flamegraph::tests::test_color_generation ... ok
[INFO] [stdout] test stackcollapse::tests::test_pid_inclusion ... ok
[INFO] [stdout] test stackcollapse::tests::test_basic_collapse ... ok
[INFO] [stdout] test stackcollapse::tests::test_format_collapsed ... ok
[INFO] [stdout] test flamegraph::tests::test_html_escaping ... ok
[INFO] [stdout] test stackcollapse::tests::test_strip_offset ... ok
[INFO] [stdout] test stackcollapse::tests::test_tidy_generic ... ok
[INFO] [stdout] test flamegraph::tests::test_with_subtitle ... ok
[INFO] [stdout] test stackcollapse::tests::test_kernel_annotation ... ok
[INFO] [stdout] test flamegraph::tests::test_basic_generation ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "40bb833382db5aac1d91e11f925d5e1120fe978fb182e59b96cec7dba9f1e69a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40bb833382db5aac1d91e11f925d5e1120fe978fb182e59b96cec7dba9f1e69a", kill_on_drop: false }`
[INFO] [stdout] 40bb833382db5aac1d91e11f925d5e1120fe978fb182e59b96cec7dba9f1e69a