Additional details: If `nfft` is changed from 125 to 128, the bug is not shown.
If `fftwf_plan_many_dft` is called with buffer pointers, the bug is not shown. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to fftw3 in Ubuntu. https://bugs.launchpad.net/bugs/1978640 Title: FFTW_PRESERVE_INPUT does not always preserve input Status in fftw3 package in Ubuntu: New Bug description: libfftw3-dev: Installed: (none) Candidate: 3.3.8-2ubuntu8 Version table: 3.3.8-2ubuntu8 500 500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages program to reproduce bug on Ubuntu 20.04 or 22.04 follows below expected: success (no assert) because the input was preserved observed: assert because the input was not preserved ```test_fftw_preserve.cc #include <fftw3.h> #include <vector> #include <complex> #include "assert.h" int main() { typedef std::complex<float> cpx; int nfft = 125; fftwf_plan plan = fftwf_plan_many_dft(1,&nfft,1, NULL, NULL,1,nfft, NULL, NULL,1,nfft, FFTW_FORWARD, FFTW_ESTIMATE|FFTW_PRESERVE_INPUT|FFTW_UNALIGNED); std::vector<cpx> in(nfft,cpx(1,2)); std::vector<cpx> in_copied(in); std::vector<cpx> out(nfft); fftwf_execute_dft(plan, reinterpret_cast<fftwf_complex*>(in.data()),reinterpret_cast<fftwf_complex*>(out.data())); assert(in == in_copied); fftwf_destroy_plan(plan); return 0; } ``` To run: ``` $ g++ test_fftw_preserve.cc -lfftw3f && ./a.out a.out: test_fftw_preserve.cc:21: int main(): Assertion `in == in_copied' failed. Aborted (core dumped) ``` To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fftw3/+bug/1978640/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
