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Diffstat (limited to 'test/pending/pos/t4786.scala')
-rw-r--r-- | test/pending/pos/t4786.scala | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/pending/pos/t4786.scala b/test/pending/pos/t4786.scala new file mode 100644 index 0000000000..f0579142b8 --- /dev/null +++ b/test/pending/pos/t4786.scala @@ -0,0 +1,24 @@ +trait Matrix[@specialized A, Repr[C] <: Matrix[C, Repr]] { // crash goes away if @specialize is removed + def duplicate(mb: MatrixBuilder[A, Repr]): Repr[A] = { + mb.zeros + } +} +trait DenseMatrix[@specialized A] extends Matrix[A, DenseMatrix] +trait DenseMatrixFlt extends DenseMatrix[Float] + +trait MatrixBuilder[@specialized A, Repr[C] <: Matrix[C, Repr]] { + def zeros: Repr[A] +} +object DenseFloatBuilder extends MatrixBuilder[Float, DenseMatrix] { + val zeros = new Object with DenseMatrixFlt + // Note: + // - in 2.9 crash goes away if the explicit type "DenseMatrixFlt" is assigned to "zeros" + // - in 2.9 crash goes away if DenseMatrixFlt is a class instead of a trait: + // val zeros = new DenseMatrixFlt +} + +object Test extends App { + val m1 = DenseFloatBuilder.zeros // in 2.9 crash goes away if explicit type "DenseMatrixFlt" is assigned to m1 + val m2 = m1.duplicate(DenseFloatBuilder) +} + |