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Fix crash on construction of SparseMatrix with zero-length diagonal

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libeigen/eigen!2249
This commit is contained in:
Tyler Veness
2026-03-05 17:43:21 -08:00
committed by Charles Schlosser
parent 265496e862
commit d8c8ee6fb2
2 changed files with 5 additions and 1 deletions
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2
Eigen/src/SparseCore/SparseMatrix.h
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@@ -1008,7 +1008,7 @@ class SparseMatrix : public SparseCompressedBase<SparseMatrix<Scalar_, Options_,
const bool overwrite = internal::is_same<Func, internal::assign_op<Scalar, Scalar>>::value;
if (overwrite) {
if ((m_outerSize != n) || (m_innerSize != n)) resize(n, n);
if ((m_outerSize != n) || (m_innerSize != n) || (n == 0)) resize(n, n);
}
if (m_data.size() == 0 || overwrite) {

4
test/sparse_basic.cpp
View File

@@ -871,6 +871,10 @@ void sparse_basic(const SparseMatrixType& ref) {
m2 -= d.asDiagonal();
refMat2 -= d.asDiagonal();
VERIFY_IS_APPROX(m2, refMat2);
// zero-length diagonal
d = DenseVector(0);
SparseMatrixType m4(d.asDiagonal());
}
// test conservative resize