Question

当我尝试在项目中运行cargo test时，这是一个错误。这是什么意思？我如何解决它？

我可以尝试使用更多详细信息进行更新，但遗憾的是我无法使用最少的示例重现它...

完整错误：

cargo test
   Compiling ranges v0.1.0 (file:///Users/user/code/rust-project)
error: cannot satisfy dependencies so `std` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot satisfy dependencies so `core` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot satisfy dependencies so `collections` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot satisfy dependencies so `rustc_unicode` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot satisfy dependencies so `alloc` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot satisfy dependencies so `rand` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot satisfy dependencies so `libc` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot satisfy dependencies so `unwind` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot satisfy dependencies so `panic_unwind` only shows up once
  |
  = help: having upstream crates all available in one format will likely make this go away

error: cannot link together two allocators: alloc_jemalloc and alloc_system

error: aborting due to 10 previous errors

在编译步骤中，当我尝试通过extern crate运行使用crate的测试时会发生这种情况，例如：How do I access files in the src directory from files in my tests directory?

在OS X上，rustc 1.12.0 (3191fbae9 2016-09-23)

Answer 1

感谢Matthieu M.指出我正确的github issue！

修复方法是将以下内容放入我的Cargo.toml：

crate-type = ["rlib", "dylib"]

如果您使用rustc选项

-C prefer-dynamic

应该解决你的问题。

错误：无法满足依赖关系，因此`std`只显示一次

1 个答案: