Changes in version 6.0.1-14 (2026-04-06)                

  - As requested by CRAN, gcc-asan and valgrind

  - Make package thread-safe: convert global state to thread_local,
    remove static from local variables in Fortran-translated C code, add
    integer overflow guards, and fix memory leaks in the R callback
    wrappers.

  - Review all C integer types; confirmed existing types are correct
    given Fortran ABI constraints (int* required for Fortran INTEGER)
    and R's INTEGER() returning int*.

  - Fix undefined behavior: add virtual destructor to EvalBase so
    deleting derived callback objects through a base pointer is
    well-defined.

  - Fix memory leak: validate n and nzm before allocating callback
    objects, preventing a leak when Rf_error is called on bad inputs.

  - Fix restart=TRUE: typo caused mode to remain 2 instead of being set
    to 3.

  - Fix assign=TRUE: wrong field name meant the compressed Hessian was
    never stored in the supplied environment.

  - Add tests for restart, assign, single-variable optimization,
    repeated calls, and input error conditions.

                Changes in version 6.0.1-13 (2026-04-02)                

  - Make package thread-safe: convert global state to thread_local,
    remove static from local variables in Fortran-translated C code, add
    integer overflow guards, and fix memory leaks in the R callback
    wrappers.

  - Review all C integer types; confirmed existing types are correct
    given Fortran ABI constraints (int* required for Fortran INTEGER)
    and R's INTEGER() returning int*.

                Changes in version 6.0.1-12 (2024-09-17)                

  - Add non binary (function pointer) interface/api so that nlmixr2est
    will not have to be re submitted when changes to this package occur.

                Changes in version 6.0.1-11 (2022-10-18)                

  - Added strict prototype fixes as requested by CRAN

  - Added a NEWS.md file to track changes to the package.