[INFO] cloning repository https://github.com/allenge007/operating-system-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/allenge007/operating-system-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fallenge007%2Foperating-system-experiment", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 98bb740d6bb0173de96cffc75279da537424ba41
[INFO] fixing allenge007/operating-system-experiment against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fallenge007%2Foperating-system-experiment" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/allenge007/operating-system-experiment
[INFO] finished tweaking git repo https://github.com/allenge007/operating-system-experiment
[INFO] tweaked toml for git repo https://github.com/allenge007/operating-system-experiment written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/allenge007/operating-system-experiment on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/allenge007/operating-system-experiment 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" "+622891a4e29178280638a6b63a8908bde2c0c854" "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-3-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 35a824cdcd0d640d703c8a50abb82acc8ce034ffcaa897eda2767c3712722a7b
[INFO] running `Command { std: "docker" "start" "35a824cdcd0d640d703c8a50abb82acc8ce034ffcaa897eda2767c3712722a7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "35a824cdcd0d640d703c8a50abb82acc8ce034ffcaa897eda2767c3712722a7b" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stdout] error[E0659]: `print` is ambiguous
[INFO] [stdout]   --> pkg/lib/src/io.rs:91:25
[INFO] [stdout]    |
[INFO] [stdout] 91 |                         print! {"{}", utf_char};
[INFO] [stdout]    |                         ^^^^^ ambiguous name
[INFO] [stdout]    |
[INFO] [stdout]    = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `print` could refer to the macro imported here
[INFO] [stdout]   --> pkg/lib/src/io.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout]  1 | use crate::*;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    = help: consider adding an explicit import of `print` to disambiguate
[INFO] [stdout]    = help: or use `self::print` to refer to this macro unambiguously
[INFO] [stdout] note: `print` could also refer to a macro from prelude
[INFO] [stdout]   --> /rustc/622891a4e29178280638a6b63a8908bde2c0c854/library/std/src/prelude/mod.rs:162:12
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `print` is ambiguous
[INFO] [stdout]   --> pkg/lib/src/io.rs:94:25
[INFO] [stdout]    |
[INFO] [stdout] 94 |                         print!("{}", ch as char);
[INFO] [stdout]    |                         ^^^^^ ambiguous name
[INFO] [stdout]    |
[INFO] [stdout]    = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `print` could refer to the macro imported here
[INFO] [stdout]   --> pkg/lib/src/io.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout]  1 | use crate::*;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    = help: consider adding an explicit import of `print` to disambiguate
[INFO] [stdout]    = help: or use `self::print` to refer to this macro unambiguously
[INFO] [stdout] note: `print` could also refer to a macro from prelude
[INFO] [stdout]   --> /rustc/622891a4e29178280638a6b63a8908bde2c0c854/library/std/src/prelude/mod.rs:162:12
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `println` is ambiguous
[INFO] [stdout]   --> pkg/lib/src/io.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         println!();
[INFO] [stdout]    |         ^^^^^^^ ambiguous name
[INFO] [stdout]    |
[INFO] [stdout]    = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `println` could refer to the macro imported here
[INFO] [stdout]   --> pkg/lib/src/io.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout]  1 | use crate::*;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    = help: consider adding an explicit import of `println` to disambiguate
[INFO] [stdout]    = help: or use `self::println` to refer to this macro unambiguously
[INFO] [stdout] note: `println` could also refer to a macro from prelude
[INFO] [stdout]   --> /rustc/622891a4e29178280638a6b63a8908bde2c0c854/library/std/src/prelude/mod.rs:162:12
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0659`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yslib` (lib test) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> pkg/storage/src/common/io.rs:53:29
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn write_all(&mut self, mut buf: &[u8]) -> FsResult {
[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: `buf`
[INFO] [stdout]   --> pkg/storage/src/common/io.rs:53:29
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn write_all(&mut self, mut buf: &[u8]) -> FsResult {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> pkg/storage/src/fs/fat16/file.rs:51:16
[INFO] [stdout]    |
[INFO] [stdout] 51 |             if let Cluster(c) = current_cluster {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> pkg/storage/src/fs/fat16/file.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |         if let Cluster(c) = self.current_cluster {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]    --> pkg/storage/src/fs/fat16/file.rs:217:24
[INFO] [stdout]     |
[INFO] [stdout] 217 |     fn seek(&mut self, pos: SeekFrom) -> FsResult<usize> {
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `block_size`
[INFO] [stdout]  --> pkg/storage/src/fs/fat16/impls.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let block_size = Block512::size();
[INFO] [stdout]   |             ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `BLOCK_SIZE`
[INFO] [stdout]   |
[INFO] [stdout] 7 -         let block_size = Block512::size();
[INFO] [stdout] 7 +         let fs::fat16::BLOCK_SIZE = Block512::size();
[INFO] [stdout]   |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let _block_size = Block512::size();
[INFO] [stdout]   |             +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> pkg/storage/src/fs/fat16/impls.rs:136:16
[INFO] [stdout]     |
[INFO] [stdout] 136 |             if let Cluster(c) = current_cluster {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> pkg/storage/src/fs/fat16/impls.rs:176:14
[INFO] [stdout]     |
[INFO] [stdout] 176 |         for (i, part) in parts.iter().enumerate() {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> pkg/storage/src/common/io.rs:53:29
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn write_all(&mut self, mut buf: &[u8]) -> FsResult {
[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: `buf`
[INFO] [stdout]   --> pkg/storage/src/common/io.rs:53:29
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn write_all(&mut self, mut buf: &[u8]) -> FsResult {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> pkg/storage/src/fs/fat16/file.rs:51:16
[INFO] [stdout]    |
[INFO] [stdout] 51 |             if let Cluster(c) = current_cluster {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> pkg/storage/src/fs/fat16/file.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |         if let Cluster(c) = self.current_cluster {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]    --> pkg/storage/src/fs/fat16/file.rs:217:24
[INFO] [stdout]     |
[INFO] [stdout] 217 |     fn seek(&mut self, pos: SeekFrom) -> FsResult<usize> {
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `block_size`
[INFO] [stdout]  --> pkg/storage/src/fs/fat16/impls.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let block_size = Block512::size();
[INFO] [stdout]   |             ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `BLOCK_SIZE`
[INFO] [stdout]   |
[INFO] [stdout] 7 -         let block_size = Block512::size();
[INFO] [stdout] 7 +         let fs::fat16::BLOCK_SIZE = Block512::size();
[INFO] [stdout]   |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let _block_size = Block512::size();
[INFO] [stdout]   |             +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> pkg/storage/src/fs/fat16/impls.rs:136:16
[INFO] [stdout]     |
[INFO] [stdout] 136 |             if let Cluster(c) = current_cluster {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> pkg/storage/src/fs/fat16/impls.rs:176:14
[INFO] [stdout]     |
[INFO] [stdout] 176 |         for (i, part) in parts.iter().enumerate() {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "35a824cdcd0d640d703c8a50abb82acc8ce034ffcaa897eda2767c3712722a7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35a824cdcd0d640d703c8a50abb82acc8ce034ffcaa897eda2767c3712722a7b", kill_on_drop: false }`
[INFO] [stdout] 35a824cdcd0d640d703c8a50abb82acc8ce034ffcaa897eda2767c3712722a7b
