test test/03_api/api_slicer_for.c hang

[Alessandro-Barbieri]

configured with ./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --datarootdir=/usr/share --disable-dependency-tracking --disable-silent-rules --disable-static --docdir=/usr/share/doc/nanox-0.15_p20210818 --htmldir=/usr/share/doc/nanox-0.15_p20210818/html --with-sysroot=/ --libdir=/usr/lib64 --disable-static --enable-gcc-new-atomic-builtins --enable-performance --enable-shared --without-cellsdk --without-chapel --without-cuda --without-mcc --without-nextsim --without-xdma --disable-allocator --disable-memtracker --disable-debug --enable-instrumentation --disable-instrumentation-debug --enable-performance --disable-resiliency --disable-task-callback --enable-ult --without-opencl --without-ayudame --without-dlb --with-extrae=/usr --without-gasnet --without-hwloc --without-memkind --without-mpi --without-papi --with-sqlite3=/usr

I've tried more than one time but the tests completed only once

see also https://bugs.gentoo.org/809320