[INFO] fetching crate ff-util 0.1.2...
[INFO] testing ff-util-0.1.2 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate ff-util 0.1.2 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate ff-util 0.1.2
[INFO] finished tweaking crates.io crate ff-util 0.1.2
[INFO] tweaked toml for crates.io crate ff-util 0.1.2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ff-util 0.1.2 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ff-util 0.1.2 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff4c678bf70e23269bfcceba5ba3b67225e34622f62e0f21349da429e148ba69
[INFO] running `Command { std: "docker" "start" "-a" "ff4c678bf70e23269bfcceba5ba3b67225e34622f62e0f21349da429e148ba69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff4c678bf70e23269bfcceba5ba3b67225e34622f62e0f21349da429e148ba69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff4c678bf70e23269bfcceba5ba3b67225e34622f62e0f21349da429e148ba69", kill_on_drop: false }`
[INFO] [stdout] ff4c678bf70e23269bfcceba5ba3b67225e34622f62e0f21349da429e148ba69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 497a408a48a914b09488f76823c0cc2d4bc78e3107545233a4f71f6789a58118
[INFO] running `Command { std: "docker" "start" "-a" "497a408a48a914b09488f76823c0cc2d4bc78e3107545233a4f71f6789a58118", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling ff-util v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/lib.rs:18:49
[INFO] [stdout]    |
[INFO] [stdout] 18 | ...                   for matched_file in &file {
[INFO] [stdout]    |                                           ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             while let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             if let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/lib.rs:18:49
[INFO] [stdout]    |
[INFO] [stdout] 18 | ...                   for matched_file in &file {
[INFO] [stdout]    |                                           ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             while let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             if let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `Command { std: "docker" "inspect" "497a408a48a914b09488f76823c0cc2d4bc78e3107545233a4f71f6789a58118", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "497a408a48a914b09488f76823c0cc2d4bc78e3107545233a4f71f6789a58118", kill_on_drop: false }`
[INFO] [stdout] 497a408a48a914b09488f76823c0cc2d4bc78e3107545233a4f71f6789a58118
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a024b9814f4c8e7602c35d22cb8f5baec37f0e2e55977e91bdfae697fe63801f
[INFO] running `Command { std: "docker" "start" "-a" "a024b9814f4c8e7602c35d22cb8f5baec37f0e2e55977e91bdfae697fe63801f", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling ff-util v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/lib.rs:18:49
[INFO] [stdout]    |
[INFO] [stdout] 18 | ...                   for matched_file in &file {
[INFO] [stdout]    |                                           ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             while let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             if let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/lib.rs:18:49
[INFO] [stdout]    |
[INFO] [stdout] 18 | ...                   for matched_file in &file {
[INFO] [stdout]    |                                           ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             while let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             if let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/lib.rs:18:49
[INFO] [stdout]    |
[INFO] [stdout] 18 | ...                   for matched_file in &file {
[INFO] [stdout]    |                                           ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             while let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 18 -                             for matched_file in &file {
[INFO] [stdout] 18 +                             if let Ok(matched_file) = &file {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "a024b9814f4c8e7602c35d22cb8f5baec37f0e2e55977e91bdfae697fe63801f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a024b9814f4c8e7602c35d22cb8f5baec37f0e2e55977e91bdfae697fe63801f", kill_on_drop: false }`
[INFO] [stdout] a024b9814f4c8e7602c35d22cb8f5baec37f0e2e55977e91bdfae697fe63801f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 386f4d635c4a50a3f68751dfc45b40041d3c3399e4255332a27cb96735cfa86b
[INFO] running `Command { std: "docker" "start" "-a" "386f4d635c4a50a3f68751dfc45b40041d3c3399e4255332a27cb96735cfa86b", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stderr]   --> src/lib.rs:18:49
[INFO] [stderr]    |
[INFO] [stderr] 18 | ...                   for matched_file in &file {
[INFO] [stderr]    |                                           ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stderr] help: to check pattern in a loop use `while let`
[INFO] [stderr]    |
[INFO] [stderr] 18 -                             for matched_file in &file {
[INFO] [stderr] 18 +                             while let Ok(matched_file) = &file {
[INFO] [stderr]    |
[INFO] [stderr] help: consider using `if let` to clear intent
[INFO] [stderr]    |
[INFO] [stderr] 18 -                             for matched_file in &file {
[INFO] [stderr] 18 +                             if let Ok(matched_file) = &file {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `ff-util` (lib) generated 1 warning
[INFO] [stderr] warning: `ff-util` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: found module declaration for lib.rs
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | mod lib;
[INFO] [stderr]   | ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: lib.rs is the root of this crate's library target
[INFO] [stderr]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stderr]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `ff-util` (bin "ff-util" test) generated 2 warnings (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ff_util-fa15e56408af53bb)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/ff_util-279af726b8f071da)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ff_util
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "386f4d635c4a50a3f68751dfc45b40041d3c3399e4255332a27cb96735cfa86b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "386f4d635c4a50a3f68751dfc45b40041d3c3399e4255332a27cb96735cfa86b", kill_on_drop: false }`
[INFO] [stdout] 386f4d635c4a50a3f68751dfc45b40041d3c3399e4255332a27cb96735cfa86b