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Fix string corruption when overlapping strings are copied. #1489

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@gkamat gkamat commented Mar 12, 2021

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hyenias added a commit to hyenias/ksh that referenced this pull request Mar 20, 2021
While experimenting with ksh93#233, a memory segmentation fault occurred.
A search of other emacs issues found a potential matching issue as
described in att#791. Also, a duplicate
PR of att#1489 was submitted. This
commit backports that fix.

src/cmd/ksh93/edit/history.c: hist_word():
- Switch from using strcpy to memmove as the two strings could overlap.
McDutchie pushed a commit to ksh93/ksh that referenced this pull request Mar 20, 2021
While experimenting with #233, a memory segmentation fault occurred.
A search of other emacs issues found a potential matching issue as
described in att#791. Also, a duplicate
PR of att#1489 was submitted. This
commit backports that fix.

src/cmd/ksh93/edit/history.c: hist_word():
- Switch from using strcpy to memmove as the two strings could overlap.
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