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To:	cygwin AT cygwin DOT com
From:	Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Subject:	cygwin64 info.exe Exception: =?utf-8?b?U1RBVFVTX0FDQ0VTU19WSU9MQVRJT04=?= if no info file found
Date:	Thu, 31 Oct 2013 20:51:33 +0000 (UTC)
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cygwin64 info.exe consistently dumps when no info file is found - whether or
not there is a man page. 
cygwin32 works as always, displaying a man page if found, or status line
message "No menu item `zzzz' in node `(dir)Top'."

Running under gdb where there is a man page but no info file:
Reading symbols from /usr/bin/info...(no debugging symbols found)...done.
(gdb) run sntp
Starting program: /usr/bin/info sntp
[New Thread 1876.0x41c]
[New Thread 1876.0x19a8]

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x000007fefd6710dc in WaitForSingleObjectEx () from
/cygdrive/c/Windows/system32/KERNELBASE.dll
#2  0x0000000600000001 in ?? ()
#3  0x0000000000000000 in ?? ()
(gdb) return
Make selected stack frame return now? (y or n) y
#0  0x000007fefd6710dc in WaitForSingleObjectEx ()
   from /cygdrive/c/Windows/system32/KERNELBASE.dll
(gdb) cont
Continuing.
      0 [main] info 1876 open_stackdumpfile: Dumping stack trace to
info.exe.stackdump
[Inferior 1 (process 1876) exited with code 0105400]
(gdb) q

Stackdumps:
gdb run sntp
Exception: STATUS_ACCESS_VIOLATION at rip=00180168EBD
rax=0000000000000000 rbx=0000000000000000 rcx=0000000000000000
rdx=FEFEFEFF0F030100 rsi=0000000000000004 rdi=00000006000487B0
r8 =FFFFFFFF8F8B918C r9 =8080808080808080 r10=FEFEFEFEFEFEFEFF
r11=00000006000487B0 r12=0000000000000005 r13=00000006000487B0
r14=00000006000486B0 r15=00000006000493A0
rbp=000000000000000C rsp=000000000022A448
program=C:\usr\local\cygwin64\bin\info.exe, pid 1876, thread main
cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B

info sntp
Exception: STATUS_ACCESS_VIOLATION at rip=00180168EBD
rax=0000000000000000 rbx=0000000000000000 rcx=0000000000000000
rdx=FEFEFEFF0F030100 rsi=0000000000000004 rdi=0000000600048970
r8 =FFFFFFFF8F8B918C r9 =8080808080808080 r10=FEFEFEFEFEFEFEFF
r11=0000000600048970 r12=0000000000000005 r13=0000000600048970
r14=0000000600048870 r15=0000000600047AA0
rbp=000000000000000C rsp=000000000022A488
program=C:\usr\local\cygwin64\bin\info.exe, pid 4548, thread main
cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B

info zzzz
Exception: STATUS_ACCESS_VIOLATION at rip=00180168EBD
rax=0000000000000000 rbx=0000000000000000 rcx=0000000000000000
rdx=FEFEFEFF01010101 rsi=0000000000000004 rdi=0000000600048970
r8 =FFFFFFFF85858585 r9 =8080808080808080 r10=FEFEFEFEFEFEFEFF
r11=0000000600048970 r12=0000000000000005 r13=0000000600048970
r14=0000000600048870 r15=0000000600047AA0
rbp=000000000000000C rsp=000000000022A488
program=C:\usr\local\cygwin64\bin\info.exe, pid 7896, thread main
cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B

Next steps?

-- 
Take care. Thanks, Brian Inglis


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