Hi As of yesterday, stash save stopped working on my Windows 10 box - I get: > git stash save Cannot save the current worktree state and a stackdump file (see below). This is with the 64-bit version of 2.16.1. Switching to the 32-bit version resolved the problem for me. Cheers Tim PS. I think the problem was provoked by Windows security update KB4074588. Unfortunately, I am unable to uninstall this update to verify. Exception: STATUS_STACK_OVERFLOW at rip=7FFB793F4B97 rax=0000000000000010 rbx=0000000000000000 rcx=0000000000000010 rdx=000000000000000C rsi=00000000FFFFAAC0 rdi=00007FFB7164D4F0 r8 =00000000FFFFA9F8 r9 =00000000FFFFAA30 r10=00000000FFFFA000 r11=00000000FFE03E50 r12=00000000FFFFB500 r13=00000000027AD3E0 r14=000000000000014C r15=0000000000000000 rbp=00000000FFFFAA30 rsp=00000000FFFFA9E8 program=C:\Program Files\Git\usr\bin\sh.exe, pid 9752, thread unknown (0xB24) cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B Stack trace: Frame Function Args 000FFFFAA30 7FFB793F4B97 (00000000104, 000FFFFAAA8, 7FFB793D2178, 00000000000) 000FFFFAA30 7FFB793D2277 (7FFB7164D4F0, 7FFB7164D4F0, 00000000001, 00000230022) 000FFFFAAA8 7FFB761ED1F4 (7FFB79350000, 7FFB793D21F0, 7FFB793BFAE0, 7FFFFFFEFFFF) 000FFFFAC70 7FFB761ED071 (9E09000600010000, 310F3245BC40, 00000000023, 000FFFFAD98) 000FFFFAC70 7FFB761ECA44 (7FFB7164D700, 00000000000, 00000000000, 7FFB7164D700) 000FFFFAC70 7FFB715B03A0 (000FFFFAC70, 000FFFFAD98, 00002744620, 00000161140) 000FFFFAC70 7FFB715837DB (000FFFFB5A0, 00000000000, 000FFFFB950, 00002744620) 000FFFFB3D9 7FFB7155E4D0 (00000000002, 000FFFFB7C8, 0000000000E, 00180010018) 00180010018 7FFB7155CFDD (00000000000, 000FFFFB700, 00000000000, 000FFFFB7A0) 000FFFFB700 7FFB71555543 (000FFFFB870, 000000001B0, 00000000000, 00180271780) 00000000420 7FFB761ED7F6 (00000000001, 00000000000, 000FFFFB950, 00100000001) 00000000420 7FFB779CE4E3 (00000000020, 00000000000, 000FFFFBAD0, 00000000001) 00000000420 001800AB022 (000FFFFBA70, 00000000000, 00000000000, 001803007C0) 000FFFFBAF0 001800ABBD5 (00100410FBB, 00000000000, 00600089010, 001004E9740) 000FFFFBCF0 0018011C93B (00100410FBB, 00000000000, 00600089010, 001004E9740) 000FFFFBCF0 00002DEE458 (00100410FBB, 00000000000, 00600089010, 001004E9740) End of stack trace (more stack frames may be present) -------------------------------------- Dr Tim Mayo Software Architect Ubisense Ltd St Andrew's House St Andrew's Road, Chesterton Cambridge, CB4 1DL +44 1223 53 5170