[INFO] cloning repository https://github.com/ToucheSir/db_tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ToucheSir/db_tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToucheSir%2Fdb_tutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToucheSir%2Fdb_tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ae57ceba3427ce2fc15e9270affc1017ba6a19b8
[INFO] checking ToucheSir/db_tutorial against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToucheSir%2Fdb_tutorial" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ToucheSir/db_tutorial on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ToucheSir/db_tutorial
[INFO] finished tweaking git repo https://github.com/ToucheSir/db_tutorial
[INFO] tweaked toml for git repo https://github.com/ToucheSir/db_tutorial written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ToucheSir/db_tutorial 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" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bincode v0.9.2
[INFO] [stderr]   Downloaded byteorder v1.1.0
[INFO] [stderr]   Downloaded serde_derive v1.0.21
[INFO] [stderr]   Downloaded serde_derive_internals v0.17.0
[INFO] [stderr]   Downloaded serde v1.0.21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 312b7c57fd5dfd09e4414a7efd522c9767a6cdee2e0aae6b5fa2afdaa0fd328d
[INFO] running `Command { std: "docker" "start" "-a" "312b7c57fd5dfd09e4414a7efd522c9767a6cdee2e0aae6b5fa2afdaa0fd328d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "312b7c57fd5dfd09e4414a7efd522c9767a6cdee2e0aae6b5fa2afdaa0fd328d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "312b7c57fd5dfd09e4414a7efd522c9767a6cdee2e0aae6b5fa2afdaa0fd328d", kill_on_drop: false }`
[INFO] [stdout] 312b7c57fd5dfd09e4414a7efd522c9767a6cdee2e0aae6b5fa2afdaa0fd328d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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_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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ab79c5aabf0505d3c7dfdcec637acfa5dcaa255ff184fc8e18d8a41aca428b7
[INFO] running `Command { std: "docker" "start" "-a" "9ab79c5aabf0505d3c7dfdcec637acfa5dcaa255ff184fc8e18d8a41aca428b7", kill_on_drop: false }`
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]     Checking serde v1.0.21
[INFO] [stderr]    Compiling serde_derive_internals v0.17.0
[INFO] [stderr]    Compiling serde_derive v1.0.21
[INFO] [stderr]     Checking bincode v0.9.2
[INFO] [stderr]     Checking db_tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `align_of`
[INFO] [stdout]   --> src/main.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::mem::{align_of, size_of};
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `align_of`
[INFO] [stdout]   --> src/main.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::mem::{align_of, size_of};
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/main.rs:90:78
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 let mut array: [Option<Box<Node>>; 100] = unsafe { std::mem::uninitialized() };
[INFO] [stdout]    |                                                                              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_size_of` has been stable since 1.40.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_size_of)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/main.rs:90:78
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 let mut array: [Option<Box<Node>>; 100] = unsafe { std::mem::uninitialized() };
[INFO] [stdout]    |                                                                              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_size_of` has been stable since 1.40.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_size_of)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:132:25
[INFO] [stdout]     |
[INFO] [stdout] 132 |                     let mut new_page = self.allocate_page(page_num)
[INFO] [stdout]     |                         ----^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |                 let mut new_page = self.allocate_page(page_num)
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `page_num` and `max_pages` are never read
[INFO] [stdout]   --> src/main.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 |     OutOfBounds { page_num: usize, max_pages: usize },
[INFO] [stdout]    |     -----------   ^^^^^^^^         ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_value` is never used
[INFO] [stdout]   --> src/main.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl<'a> Cursor<'a> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn set_value(&mut self, val: &Row) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `end` is never used
[INFO] [stdout]    --> src/main.rs:241:8
[INFO] [stdout]     |
[INFO] [stdout] 194 | impl<'a> Table {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 241 |     fn end(&mut self) -> Box<Cursor> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `[std::option::Option<Box<Node>>; 100]` does not permit being left uninitialized
[INFO] [stdout]   --> src/main.rs:90:68
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 let mut array: [Option<Box<Node>>; 100] = unsafe { std::mem::uninitialized() };
[INFO] [stdout]    |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                                                    |
[INFO] [stdout]    |                                                                    this code causes undefined behavior when executed
[INFO] [stdout]    |                                                                    help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]    |
[INFO] [stdout] note: enums with multiple inhabited variants have to be initialized to a variant
[INFO] [stdout]   --> /rustc/5518eaa946291f00471af8b254b2a1715f234882/library/core/src/option.rs:570:1
[INFO] [stdout]    = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:132:25
[INFO] [stdout]     |
[INFO] [stdout] 132 |                     let mut new_page = self.allocate_page(page_num)
[INFO] [stdout]     |                         ----^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |                 let mut new_page = self.allocate_page(page_num)
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `page_num` and `max_pages` are never read
[INFO] [stdout]   --> src/main.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 |     OutOfBounds { page_num: usize, max_pages: usize },
[INFO] [stdout]    |     -----------   ^^^^^^^^         ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_value` is never used
[INFO] [stdout]   --> src/main.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl<'a> Cursor<'a> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn set_value(&mut self, val: &Row) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `end` is never used
[INFO] [stdout]    --> src/main.rs:241:8
[INFO] [stdout]     |
[INFO] [stdout] 194 | impl<'a> Table {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 241 |     fn end(&mut self) -> Box<Cursor> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `[std::option::Option<Box<Node>>; 100]` does not permit being left uninitialized
[INFO] [stdout]   --> src/main.rs:90:68
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 let mut array: [Option<Box<Node>>; 100] = unsafe { std::mem::uninitialized() };
[INFO] [stdout]    |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                                                    |
[INFO] [stdout]    |                                                                    this code causes undefined behavior when executed
[INFO] [stdout]    |                                                                    help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]    |
[INFO] [stdout] note: enums with multiple inhabited variants have to be initialized to a variant
[INFO] [stdout]   --> /rustc/5518eaa946291f00471af8b254b2a1715f234882/library/core/src/option.rs:570:1
[INFO] [stdout]    = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.32s
[INFO] running `Command { std: "docker" "inspect" "9ab79c5aabf0505d3c7dfdcec637acfa5dcaa255ff184fc8e18d8a41aca428b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ab79c5aabf0505d3c7dfdcec637acfa5dcaa255ff184fc8e18d8a41aca428b7", kill_on_drop: false }`
[INFO] [stdout] 9ab79c5aabf0505d3c7dfdcec637acfa5dcaa255ff184fc8e18d8a41aca428b7
