[BUG] /bin/sh crashes with the recent cygwin1.dll on x86/64

[Pavel Fedin <p dot fedin at samsung dot com>]

 Hello! I have updated my Cygwin installation and it is completely unusable.
 First, shell scripts stopped working. I have traced this down to /bin/sh
executable apparently doing nothing. Running under strace gives this:
---cut ---
$ strace /bin/sh --version
    1       1 [main] sh (6756)
**********************************************
   86      87 [main] sh (6756) Program name: C:\cygwin64\bin\sh.exe (windows
pid 6756)
   30     117 [main] sh (6756) OS version:   Windows NT-6.1
   27     144 [main] sh (6756)
**********************************************
  101     245 [main] sh (6756) sigprocmask: 0 = sigprocmask (0, 0x1802BBC68,
0x0)
  438     683 [main] sh 6756 open_shared: name shared.5, n 5, shared
0x180030000 (wanted 0x180030000), h 0x70, *m 6
   51     734 [main] sh 6756 user_heap_info::init: heap base 0x600000000,
heap top 0x600000000, heap size 0x20000000 (536870912)
   56     790 [main] sh 6756 open_shared: name
S-1-5-21-1454471165-515967899-839522115-3227.1, n 1, shared 0x180020000
(wanted 0x180020000), h 0x68, *m 6
   58     848 [main] sh 6756 user_info::create: opening user shared for
'S-1-5-21-1454471165-515967899-839522115-3227' at 0x180020000
   36     884 [main] sh 6756 user_info::create: user shared version AB1FCCE8
   61     945 [main] sh 6756 fhandler_pipe::create: name
\\.\pipe\cygwin-e022582115c10879-6756-sigwait, size 176, mode
PIPE_TYPE_MESSAGE
   82    1027 [main] sh 6756 fhandler_pipe::create: pipe read handle 0x84
   19    1046 [main] sh 6756 fhandler_pipe::create: CreateFile: name
\\.\pipe\cygwin-e022582115c10879-6756-sigwait
   47    1093 [main] sh 6756 fhandler_pipe::create: pipe write handle 0x88
   33    1126 [main] sh 6756 dll_crt0_0: finished dll_crt0_0 initialization
--- Process 6756, exception c0000005 at 000000007780E4E4
49743   50869 [main] sh 6756 __set_errno: void san::leave():315 setting
errno 66168
--- Process 6756, exception c0000005 at 0000000180111DA8
Segmentation fault
 --- cut ---

 gcc compiler also crashed, but i did not investigate it. All problems got
fixed when i downgraded cygwin package to version 1.7.28-2.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia



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