Nano 2.7.4 bugreport see also https://savannah.gnu.org/patch/index.php?9652 1. open nano in putty 2. press numlock key. you will now come to a "help" page of nano 3. press ctrl+c 4. nano will now somehow crash but the document will stay open (you will get a warning when you open the document again). The screen is filled with weird stuff: 15 /lib/x86_64-linux-gnu/libnss_compat-2.24.so 7febefc7e000-7febefe7d000 ---p 00007000 09:05 50463415 /lib/x86_64-linux-gnu/libnss_compat-2.24.so 7febefe7d000-7febefe7e000 r--p 00006000 09:05 50463415 /lib/x86_64-linux-gnu/libnss_compat-2.24.so 7febefe7e000-7febefe7f000 rw-p 00007000 09:05 50463415 /lib/x86_64-linux-gnu/libnss_compat-2.24.so 7febefe81000-7febefe8e000 r--p 00000000 09:05 241765759 /usr/share/locale/de/LC_MESSAGES/nano.mo 7febefe8e000-7febefe90000 r-xp 00000000 09:05 241770132 /usr/lib/x86_64-linux-gnu/gconv/ISO8859-1.so 7febefe90000-7febf008f000 ---p 00002000 09:05 241770132 /usr/lib/x86_64-linux-gnu/gconv/ISO8859-1.so 7febf008f000-7febf0090000 r--p 00001000 09:05 241770132 /usr/lib/x86_64-linux-gnu/gconv/ISO8859-1.so 7febf0090000-7febf0091000 rw-p 00002000 09:05 241770132 /usr/lib/x86_64-linux-gnu/gconv/ISO8859-1.so 7febf0091000-7febf0094000 r-xp 00000000 09:05 50463407 /lib/x86_64-linux-gnu/libdl-2.24.so 7febf0094000-7febf0293000 ---p 00003000 09:05 50463407 /lib/x86_64-linux-gnu/libdl-2.24.so 7febf0293000-7febf0294000 r--p 00002000 09:05 50463407 /lib/x86_64-linux-gnu/libdl-2.24.so 7febf0294000-7febf0295000 rw-p 00003000 09:05 50463407 /lib/x86_64-linux-gnu/libdl-2.24.so 7febf0295000-7febf042a000 r-xp 00000000 09:05 50463404 /lib/x86_64-linux-gnu/libc-2.24.so 7febf042a000-7febf062a000 ---p 00195000 09:05 50463404 /lib/x86_64-linux-gnu/libc-2.24.so 7febf062a000-7febf062e000 r--p 00195000 09:05 50463404 /lib/x86_64-linux-gnu/libc-2.24.so 7febf062e000-7febf0630000 rw-p 00199000 09:05 50463404 /lib/x86_64-linux-gnu/libc-2.24.so 7febf0630000-7febf0634000 rw-p 00000000 00:00 0 7febf0634000-7febf065a000 r-xp 00000000 09:05 50462799 /lib/x86_64-linux-gnu/libtinfo.so.5.9 7febf065a000-7febf0859000 ---p 00026000 09:05 50462799 /lib/x86_64-linux-gnu/libtinfo.so.5.9 7febf0859000-7febf085d000 r--p 00025000 09:05 50462799 /lib/x86_64-linux-gnu/libtinfo.so.5.9 7febf085d000-7febf085e000 rw-p 00029000 09:05 50462799 /lib/x86_64-linux-gnu/libtinfo.so.5.9 7febf085e000-7febf088c000 r-xp 00000000 09:05 50462801 /lib/x86_64-linux-gnu/libncursesw.so.5.9 7febf088c000-7febf0a8c000 ---p 0002e000 09:05 50462801 /lib/x86_64-linux-gnu/libncursesw.so.5.9 7febf0a8c000-7febf0a8d000 r--p 0002e000 09:05 50462801 /lib/x86_64-linux-gnu/libncursesw.so.5.9 7febf0a8d000-7febf0a8e000 rw-p 0002f000 09:05 50462801 /lib/x86_64-linux-gnu/libncursesw.so.5.9 7febf0a8e000-7febf0aa7000 r-xp 00000000 09:05 50462886 /lib/x86_64-linux-gnu/libz.so.1.2.8 7febf0aa7000-7febf0ca6000 ---p 00019000 09:05 50462886 /lib/x86_64-linux-gnu/libz.so.1.2.8 7febf0ca6000-7febf0ca7000 r--p 00018000 09:05 50462886 /lib/x86_64-linux-gnu/libz.so.1.2.8 7febf0ca7000-7febf0ca8000 rw-p 00019000 09:05 50462886 /lib/x86_64-linux-gnu/libz.so.1.2.8 7febf0ca8000-7febf0ccb000 r-xp 00000000 09:05 50463400 /lib/x86_64-linux-gnu/ld-2.24.so 7febf0cd0000-7febf0eb5000 r--p 00000000 09:05 241765582 /usr/lib/locale/locale-archive 7febf0eb5000-7febf0eb9000 rw-p 00000000 00:00 0 7febf0ec0000-7febf0ec1000 rw-p 00000000 00:00 0 7febf0ec1000-7febf0ec8000 r--s 00000000 09:05 241778582 /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache 7febf0ec8000-7febf0ecb000 rw-p 00000000 00:00 0 7febf0ecb000-7febf0ecc000 r--p 00023000 09:05 50463400 /lib/x86_64-linux-gnu/ld-2.24.so 7febf0ecc000-7febf0ecd000 rw-p 00024000 09:05 50463400 /lib/x86_64-linux-gnu/ld-2.24.so 7febf0ecd000-7febf0ece000 rw-p 00000000 00:00 0 7fff2cbd7000-7fff2cbf8000 rw-p 00000000 00:00 0 [stack] 7fff2cbfc000-7fff2cbfe000 r--p 00000000 00:00 0 [vvar] 7fff2cbfe000-7fff2cc00000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] Abgebrochen