Skip to content

Incorrect output of dot #584

Closed
Closed
@sebasv

Description

@sebasv

I noticed very peculiar behavior of the dot product when the ndarray-linalg package is included in a project:

Code to replicate:

extern crate ndarray;
#[cfg(test)]
mod tests {
    use ndarray::prelude::*;
    #[test]
    fn test_dgemv() {
        let a = arr2(&[[1.], [2.]]);
        let b = arr1(&[1., 2.]);
        println!("{:?}", a.t().dot(&b));
    }
}

Output:

Intel MKL ERROR: Parameter 7 was incorrect on entry to cblas_dgemv.
[0.0] shape=[1], strides=[1], layout=C | F (0x3), const ndim=1

dependencies:

[dependencies]
ndarray = "0.12.1"

[dependencies.ndarray-linalg]
version = "0.10"
features = ["intel-mkl"]

Note the lack of a panic. If I remove the ndarray-linalg dependency the output is as expected.
IMO ndarray should not outsource the dot product to BLAS when another package requires BLAS, but that is secondary to the uncaught error and faulty returned value.

Activity

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions