Using Eigen in C++Builder v11, Clang compiler 64 bit:

All the Eigen dense solvers compile and link without problem except these three:
bdcSvd()
jacobiSvd()
completeOrthogonalDecomposition()

In debug mode only, they give a "Fatal: access violation, Link terminated" error, without any other information.
This does not seem to be the usual C++Builder ilink64 bit debug memory overrun problem, which will usually give an out-of-memory error.

The matrices and vectors are complex double, if that is relevant.

Any ideas where the problem may lie, or why these might be unique?

Thanks