Cargo无法找到已在Toml声明且实际存在的thread_pool crate

我有一个大型Rust项目，其Cargo.toml配置如下：

[package]
name = "semperengine"
version = "0.1.0"
edition = "2021"

[lib]
name = "semperengine"
path = "src/lib.rs"

[dependencies]
rand_pcg = "0.3.1"
rand = "0.8.5"
image = "0.24.3"
cfg-if = "1.0.0"

# internal
algebra = { path = "crates/algebra" }
builder = { path = "crates/builder" }
camera = { path = "crates/camera" }
chicken_wire = { path = "crates/chicken_wire" }
dual_contouring = { path = "crates/dual_contouring/" }
geometry = { path = "crates/geometry" }
hedge = { path = "crates/hedge" }
iterators = { path = "crates/iterators" }
ne_core = { path = "crates/ne_core" }
ne_gui = { path = "crates/ne_gui" }
noise = { path = "crates/noise" }
numerical_analysis = { path = "crates/numerical_analysis" }
peripherals = { path = "crates/peripherals" }
pga = { path = "crates/pga" }
topology = { path = "crates/topology" }
thread_pool = { path = "crates/thread_pool" }
vulkan_bindings = { path = "crates/vulkan_bindings" }

运行cargo build时出现如下错误：

error: no matching package named `thread_pool` found
location searched: /home/makogan/rust_never_engine/crates/thread_pool
required by package `semperengine v0.1.0 (/home/makogan/rust_never_engine)`

但thread_pool crate确实存在，执行ls命令可见目录内容：

ls /home/makogan/rust_never_engine/crates/thread_pool/
benches  Cargo.lock  Cargo.toml  flamegraph.svg  out.txt  perf.data  perf.data.old  src  target

为何Cargo能找到其他内部crate，却无法找到这个特定的thread_pool？

• 子crate名称不匹配：检查crates/thread_pool/Cargo.toml中[package]下的name字段是否为thread_pool。Cargo依赖声明的名称必须和子crate的name完全一致，区分大小写的系统中大小写差异也会导致识别失败。
• 路径大小写问题：Linux/macOS等系统区分文件名大小写，确认主项目Cargo.toml里的路径crates/thread_pool和实际目录的大小写完全一致。
• 子crate配置文件语法错误：打开crates/thread_pool/Cargo.toml检查是否存在语法错误，比如缺失括号、逗号，或者字段格式错误，这类问题会导致Cargo无法解析该crate。
• 缓存异常：执行cargo clean清理Cargo缓存后，重新运行cargo build，缓存问题可能导致异常的依赖识别失败。
• 缺少入口文件：确认crates/thread_pool/src目录下存在lib.rs（库crate）或main.rs（二进制crate），没有入口文件的话Cargo无法识别该目录为有效crate。

内容的提问来源于stack exchange，提问作者Makogan