Trying to build the rand library with no success

cargo build rand

$ cargo build --verbose
       Fresh log v0.2.5
       Fresh libc v0.1.2
   Compiling rand v0.1.4 (file:///Users/savery/Documents/networks%20152a/ecs152-project/rust/lib/rand)
     Running `rustc src/lib.rs --crate-name rand --crate-type lib -g -C metadata=eac54f9484448b08 -C extra-filename=-eac54f9484448b08 --out-dir /Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target --emit=dep-info,link -L dependency=/Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target -L dependency=/Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target/deps --extern libc=/Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target/deps/liblibc-8d21de95f4de7169.rlib --extern log=/Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target/deps/liblog-045aab9d45b4c031.rlib`
src/lib.rs:236:5: 236:38 error: unresolved import `std::num::wrapping::Wrapping`. Could not find `wrapping` in `std::num`
src/lib.rs:236 use std::num::wrapping::Wrapping as w;
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/isaac.rs:18:5: 18:39 error: unresolved import `core::num::wrapping::Wrapping`. Could not find `wrapping` in `core::num`
src/isaac.rs:18 use core::num::wrapping::Wrapping as w;
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/chacha.rs:16:5: 16:39 error: unresolved import `core::num::wrapping::Wrapping`. Could not find `wrapping` in `core::num`
src/chacha.rs:16 use core::num::wrapping::Wrapping as w;
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/distributions/range.rs:17:5: 17:39 error: unresolved import `core::num::wrapping::Wrapping`. Could not find `wrapping` in `core::num`
src/distributions/range.rs:17 use core::num::wrapping::Wrapping as w;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 4 previous errors
Could not compile `rand`.

Caused by:
  Process didn't exit successfully: `rustc src/lib.rs --crate-name rand --crate-type lib -g -C metadata=eac54f9484448b08 -C extra-filename=-eac54f9484448b08 --out-dir /Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target --emit=dep-info,link -L dependency=/Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target -L dependency=/Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target/deps --extern libc=/Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target/deps/liblibc-8d21de95f4de7169.rlib --extern log=/Users/savery/Documents/networks 152a/ecs152-project/rust/lib/rand/target/deps/liblog-045aab9d45b4c031.rlib` (exit code: 101)

I am having the exact same issue. Do you know if there is a way to force cargo to build with rand v0.1.2?

I found the error. You need to update to the latest Nightly

Thanks, this also helped me. Is there a version constraint on rand that makes it compile under a2?

@pgonda: you can tell cargo which version your cargo project depends on in the cargo.toml file. but version 0.1.4 fails with the same error here.. would be interested in a way to build with v1.0.0.a2