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RCS 5.7 delete all revs bug

From: John Kelly
Subject: RCS 5.7 delete all revs bug
Date: Wed, 1 Jul 2020 21:09:39 +0000

This bug is NOT in 5.6 or 5.8.1, only 5.7. But I use
RCS on DOS and don't care about any release after 5.7.

Here's the fix pasted inline, but who knows
about the gmail formatting. I will attach the
diff to try and preserve the tabs.

fix -o1.1: (delete all revs) bug
skip fastcopy() when Head == null
it's extra junk now, and we don't
want it trashing our clean repo

diff -Nru a/rcsedit.c b/rcsedit.c
--- a/rcsedit.c    1995-06-16 06:19:24 +0000
+++ b/rcsedit.c    2020-07-01 20:30:24 +0000
@@ -1882,7 +1882,8 @@

     if (changed && !nerror) {
         if (finptr) {
-            fastcopy(finptr, frewrite);
+            if (Head)
+                fastcopy(finptr, frewrite);
         if (1 < RCSstat.st_nlink)

Attachment: bugdiff.txt
Description: Text document

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