Assertion failed: rev == NULL || isdigit ((unsigned char) *rev)

[David Everly]

I have an unusual situation:

My project has the following tags (in order of appearance):

tag_a
tag_b
tag_c

I have been asked to see if I can take the project back to tag_b and
then add in the changes made between tag_c and now.

So I did the following to see what would happen:

cvs checkout my_project
cd my_project
cvs update -j HEAD -j tag_b
cvs update -j tag_c -j HEAD

In the binary for Solaris downloaded from cvshome.org, I get the
following during the last command:

Assertion failed: rev == NULL || isdigit ((unsigned char) *rev), file
/u/scjones/cvs-nightly/src/rcs.c, line 3990
cvs [server aborted]: received abort signal

cvs --version

Concurrent Versions System (CVS) 1.11.1p1 (client/server)