Problem with merging branches

[Reinstein, Shlomo]

Hi,

I see a strange behavior of CVS (version 1.10.8).
Let's say I create a branch of my CVS project, I develop the project on the
branch, and commit to the branch several times. In one of the commits to the
branch, I delete the file "a.c". Note that the file is deleted only from the
branch, but remains on the trunk.

At some point, I tag the version of the project on the branch, let's call
this tag "branch_version_1". (Note that this is a specific version from the
branch, but this is not the name of the branch.) And then I continue to
develop the component on the branch.
During the whole time, there are no changes to "a.c" on the trunk, it stays
(on the trunk) as it was just before the branch.

Now I want to merge everything that I made on the branch up to
"branch_version_1" into the trunk. So I checkout the project (the latest
version from the trunk), and I type:
        cvs update -j branch_version_1
I expect this merge to delete "a.c" from my working directory, given that it
was deleted on the branch before this tag (branch_version_1), however, I
found out that "a.c" remains in my working directory and is not scheduled
for removal.

I also noticed that when I use the name of the branch with the "-j"
parameter, "a.c" does get deleted and scheduled for removal. Why isn't it
deleted when the tag is not the name of the branch?

Thanks,
Shlomo