[hackers] [sbase] Revert "ed: remove double free in join()" || Roberto E. Vargas Caballero

[git]

commit 78bfd8978ea2af10dadc3fdadd19710068a632c4
Author:     Roberto E. Vargas Caballero <roberto.var...@igrid-td.com>
AuthorDate: Tue Jan 10 08:41:35 2017 +0100
Commit:     Roberto E. Vargas Caballero <roberto.var...@igrid-td.com>
CommitDate: Tue Jan 10 08:41:35 2017 +0100

    Revert "ed: remove double free in join()"
    
    This reverts commit 30da327fbd27eee508c5492a763ea19d7cd9e281.
    The double free is needed to avoid memory leaks when signals are caught

diff --git a/ed.c b/ed.c
index 52b2684..f579116 100644
--- a/ed.c
+++ b/ed.c
@@ -813,8 +813,9 @@ join(void)
        int i;
        char *t, c;
        size_t len = 0, cap = 0;
-       char *s;
+       static char *s;
 
+       free(s);
        for (s = NULL, i = line1;; i = nextln(i)) {
                for (t = gettxt(i); (c = *t) != '\n'; ++t)
                        s = addchar(*t, s, &cap, &len);