On Sat, 25 Jan 2020 17:55:31 +0100 Marco Atzeriwrote: > libinterp/corefcn/file-io.cc-tst > ...............................fatal: caught signal Segmentation fault > -- stopping myself... > /bin/sh: line 1: 3771 Segmentation fault (core dumped) /bin/sh > ../run-octave --norc --silent --no-history -p > /cygdrive/d/cyg_pub/devel/octave/prova_311_510/octave-5.1.0-2.x86_64/build/test/mex > /cygdrive/d/cyg_pub/devel/octave/prova_311_510/octave-5.1.0-2.x86_64/src/octave-5.1.0/test/fntests.m > /cygdrive/d/cyg_pub/devel/octave/prova_311_510/octave-5.1.0-2.x86_64/src/octave-5.1.0/test > make[3]: *** [Makefile:31176: check-local] Error 139 Does this occur when you execute make check in build directory? In my environment, at least segmentation fault does not occur. When I built octave, many of non-mandatory libraries were not installed. This might affect. Attached is the output of 'make check' in my environment. Windows version: Windows 10 1909 Microsoft Windows [Version 10.0.18363.592] Cygwin version: CYGWIN_NT-10.0 3.1.3(0.340/5/3) 2020-01-25 12:20 x86_64 Cygwin (The version which is applied a few patches not accepted yet. Should be very close to snapshot 2020-01-24.) -- Takashi Yano