Hello, I'm seeing an issue when attempting to install Cygwin where the installer hangs while trying to run postinstall scripts (more specifically, /etc/postinstall/0p_000_autorebase.dash). When the hang occurs, I see a 'dash.exe' process chewing up 100% of a CPU. If I attach to the process with WinDbg, I see:
(940.978): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. cygwin1!memmem+0xcb: 00007ffa`490cbb1b 410fb60424 movzx eax,byte ptr [r12] ds:00007ffa`552651f7=?? 0:000> k # Arch Child-SP RetAddr Call Site 00 AMD64 00000007`ffffc930 00007ffa`48f8028f cygwin1!memmem+0xcb 01 AMD64 00000007`ffffca90 00007ffa`48f80a49 cygwin1!cygwin_split_path+0x3a0 02 AMD64 00000007`ffffcb20 00007ffa`48f37071 cygwin1!cygwin_split_path+0xb5a 03 AMD64 00000007`ffffcc50 00007ffa`48f35e08 cygwin1!cygwin_dll_init+0x26b 04 AMD64 00000007`ffffcd80 00007ffa`48f35e86 cygwin1!_assert+0x23f0 05 AMD64 00000007`ffffcdd0 00000000`00000000 cygwin1!_assert+0x246e I'm not sure how much I can trust the stack trace here, though. If I kill that 'dash.exe' process, then the installer proceeds and tries running more postinstall scripts, but hangs in a similar way. I believe this worked quite recently, so I suspect the issue might be caused by a recent change in Windows. I'm running an insider build of Windows Pro, inside a Parallels VM on an M1 macOS machine. My Windows version: Edition Windows 11 Pro Version 24H2 Installed on 2/10/2024 OS build 26052.1000 Experience Windows Feature Experience Pack 1000.26052.1000.0 For reference, I first bumped into this when using Git Bash as bundled with Git for Windows, but it sounds like the underlying issue may be in Cygwin. See https://github.com/git-for-windows/git/issues/4808 for more details. Does any of this sound familiar? Is there anything else I can do to get more information here; e.g. are there builds of Cygwin with debug symbols published somewhere, or should I try producing my own debug build? Thanks, Kevin -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
