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ABI build failure in GitHub Actions

Status: Open.

#7778 In pmodels/mpich;

· dalcinl opened on Apr 21, 2026

potential memleak in MPIDI_CMA_copy_data()

Status: Open.

#7774 In pmodels/mpich;

· dirkmueller opened on Apr 20, 2026

Regression in MPICH 5.0.1 on macOS ARM64 with pack/unpack external32 for MPI_LONG_DOUBLE

Status: Open.

#7771 In pmodels/mpich;

· dalcinl opened on Apr 20, 2026

MPI ABI on i686 systems creates bogus duplicate types

Status: Open.

#7770 In pmodels/mpich;

· giordano opened on Apr 18, 2026

MPI_File_c2f is exported when building MPI ABI

Status: Open.

#7769 In pmodels/mpich;

· eschnett opened on Apr 15, 2026

GCC warnings building the 5.0.1.rc3 tarball

Status: Open.

#7766 In pmodels/mpich;

· dalcinl opened on Apr 9, 2026

RC tarballs and shared library versioning

Status: Open.

#7765 In pmodels/mpich;

· dalcinl opened on Apr 8, 2026

Error in test for large-count datatypes

Status: Open.

#7764 In pmodels/mpich;

· devreal opened on Apr 8, 2026

Failure in finalize

Status: Open.

#7760 In pmodels/mpich;

· wgropp opened on Apr 6, 2026

abi: MPICH does not provide the Fortran ABI library and compile wrapper

Status: Open.

#7759 In pmodels/mpich;

· raffenet opened on Apr 1, 2026

Single MPI all_reduce 50x slower than oneccl

Status: Open.

#7752 In pmodels/mpich;

· TApplencourt opened on Mar 20, 2026

hydra from mpich 5.0.0 does not fall back to PMI 1.1

Status: Open.

#7751 In pmodels/mpich;

· garlick opened on Mar 19, 2026