<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/60662>60662</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [mlir] tensor.from_elements on complex crashes during folding
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            mlir:core,
            mlir:tensor,
            crash
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          d0k
      </td>
    </tr>
</table>

<pre>
    ```
func.func @from_elements.constant_complex() -> tensor<3xcomplex<f32>> {
  %c1 = arith.constant dense<(1.2, 2.3)> : tensor<complex<f32>>
  %complex1 = tensor.extract %c1[] : tensor<complex<f32>>
  %c2 = arith.constant dense<(3.2, 2.1)> : tensor<complex<f32>>
  %complex2 = tensor.extract %c2[] : tensor<complex<f32>>
  %tensor = tensor.from_elements %complex1, %complex2, %complex1 : tensor<3xcomplex<f32>>
  return %tensor : tensor<3xcomplex<f32>>
}
```

```
$ mlir-opt -canonicalize complex.mlir
mlir-opt: mlir/lib/IR/BuiltinAttributes.cpp:902: static mlir::DenseElementsAttr mlir::DenseElementsAttr::get(mlir::ShapedType, ArrayRef<mlir::Attribute>): Assertion `attr.isa<StringAttr>() && "expected string value for non integer/index/float element"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: mlir-opt -canonicalize complex.mlir
...
 #9 0x0000564e01be4779 mlir::DenseElementsAttr::get(mlir::ShapedType, llvm::ArrayRef<mlir::Attribute>) (bin/mlir-opt+0x4076779)
#10 0x0000564e012785a0 mlir::tensor::FromElementsOp::fold(mlir::tensor::FromElementsOpGenericAdaptor<llvm::ArrayRef<mlir::Attribute>>) (bin/mlir-opt+0x370a5a0)
```
</pre>
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