Description of problem:

tcsh crash when pressing tab to complete

Version-Release number of selected component (if applicable):

tcsh-6.19.00-4.fc24.x86_64

How reproducible:
Always

Steps to Reproduce:
1. start tcsh
2. press tab
3. crash

Actual results:
crash

Expected results:
should display command completion options for commands in $path, or if after the first token, files in $cwd

Additional info:

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7674558 in rewinddir () from /lib64/libc.so.6
(gdb) bt
#0  0x00007ffff7674558 in rewinddir () from /lib64/libc.so.6
#1  0x0000555555580d85 in tw_file_start ()
#2  0x00005555555828fc in tw_collect ()
#3  0x0000555555583e45 in t_search ()
#4  0x0000555555584e97 in tenematch ()
#5  0x0000555555594404 in Inputl ()
#6  0x000055555557288a in readc.part ()
#7  0x0000555555575397 in lex ()
#8  0x000055555555d60f in process ()
#9  0x000055555555c445 in main ()