CVS commit: src/lib/libedit

["Christos Zoulas" <christos%netbsd.org@localhost>]

Module Name:    src
Committed By:   christos
Date:           Tue Oct 23 16:49:13 UTC 2018

Modified Files:
        src/lib/libedit: refresh.c

Log Message:
Apply revisions 1.21, 1.22 from OpenBSD:

In re_fastputc(), set lastline to the new line, not the previous
line so it gets initialized properly.  Fixes a crash in bc with
MALLOC_OPTIONS=UJ.  OK deraadt@, committing on behalf of yasuoka@

Initialize "old" screen buffer lines before use; otherwise, they would
never get NUL-terminated and cause read buffer overruns.
This fixes for example segfaults in sftp(1) that could be triggered
by typing in an extremely long string (more than one line - the longer,
the likelier to crash), then hitting backspace once.
Problem reported and patch OK'ed by sthen@.

XXX: pullup-8


To generate a diff of this commit:
cvs rdiff -u -r1.54 -r1.55 src/lib/libedit/refresh.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.