Try running the command: spack spec petsc.4.4. This produces the output below. Note that it chose superlu-dist-0.2.0, instead of, say superlu-dist.3. This is clearly a bug. Non-checksummable versions should NEVER be chosen by default. (And this version doesn't work with petsc.4.4 anyway).
Input spec
--------------------------------
petsc.4.4
Concretized
--------------------------------
petsc.4.4%gcc.9.3~X clanguage=C ~complex~debug+double+hdf5+hypre~int64+metis+mpi~mumps+shared~suite-sparse+superlu-dist~trilinos arch=linux-centos7-x86_64
^hdf5.10.4%gcc.9.3~cxx~debug+fortran+hl+mpi+pic+shared~szip~threadsafe arch=linux-centos7-x86_64
^numactl.0.12%gcc.9.3 arch=linux-centos7-x86_64
^autoconf.69%gcc.9.3 arch=linux-centos7-x86_64
^m4.4.18%gcc.9.3 patches=3877ab548f88597ab2327a2230ee048d2d07ace1062efe81fc92e91b7f39cd00,c0a408fbffb7255fcc75e26bd8edab116fc81d216bfd18b473668b7739a4158e,fc9b61654a3ba1a8d6cd78ce087e7c96366c290bc8d2c299f09828d793b853c8 +sigsegv arch=linux-centos7-x86_64
^libsigsegv.11%gcc.9.3 arch=linux-centos7-x86_64
^perl.26.2%gcc.9.3+cpanm patches=0eac10ed90aeb0459ad8851f88081d439a4e41978e586ec743069e8b059370ac +shared+threads arch=linux-centos7-x86_64
^gdbm.18.1%gcc.9.3 arch=linux-centos7-x86_64
^readline.0%gcc.9.3 arch=linux-centos7-x86_64
^ncurses.1%gcc.9.3~symlinks~termlib arch=linux-centos7-x86_64
^pkgconf.5.4%gcc.9.3 arch=linux-centos7-x86_64
^automake.16.1%gcc.9.3 arch=linux-centos7-x86_64
^libtool.4.6%gcc.9.3 arch=linux-centos7-x86_64
^openmpi.1.3%gcc.9.3~cuda+cxx_exceptions fabrics=auto ~java~legacylaunchers~memchecker~pmi schedulers=auto ~sqlite3~thread_multiple+vt arch=linux-centos7-x86_64
^hwloc.11.11%gcc.9.3~cairo~cuda~gl+libxml2~nvml+pci+shared arch=linux-centos7-x86_64
^libpciaccess.13.5%gcc.9.3 arch=linux-centos7-x86_64
^util-macros.19.1%gcc.9.3 arch=linux-centos7-x86_64
^libxml2.9.8%gcc.9.3~python arch=linux-centos7-x86_64
^libiconv.15%gcc.9.3 arch=linux-centos7-x86_64
^xz.2.4%gcc.9.3 arch=linux-centos7-x86_64
^zlib.2.11%gcc.9.3+optimize+pic+shared arch=linux-centos7-x86_64
^hypre.13.0%gcc.9.3~debug~int64~internal-superlu+mpi+shared arch=linux-centos7-x86_64
^openblas.3.5%gcc.9.3 cpu_target=auto ~ilp64+pic+shared threads=none ~virtual_machine arch=linux-centos7-x86_64
^metis.1.0%gcc.9.3 build_type=Release ~gdb~int64 patches=4991da938c1d3a1d3dea78e49bbebecba00273f98df2a656e38b83d55b281da1 +real64+shared arch=linux-centos7-x86_64
^cmake.13.3%gcc.9.3~doc+ncurses+openssl+ownlibs~qt arch=linux-centos7-x86_64
^openssl.1.1%gcc.9.3+systemcerts arch=linux-centos7-x86_64
^parmetis.0.3%gcc.9.3 build_type=RelWithDebInfo ~gdb patches=4f892531eb0a807eb1b82e683a416d3e35154a455274cf9b162fb02054d11a5b,50ed2081bc939269689789942067c58b3e522c269269a430d5d34c00edbc5870,704b84f7c7444d4372cb59cca6e1209df4ef3b033bc4ee3cf50f369bce972a9d +shared arch=linux-centos7-x86_64
^superlu-dist-0.2.0%gcc.9.3 build_type=RelWithDebInfo ~int64+shared arch=linux-centos7-x86_64
该提问来源于开源项目：spack/spack
