merge_trees(): ensure that the callers release output buffer

diff --git a/git-rebase--merge.sh b/git-rebase--merge.sh
index 2cc2a6d2734c0ef12222004f22d717f4f724d82f..06a4723d4db3db74ea17ace60d824e83cdee25e9 100644 (file)
--- a/git-rebase--merge.sh
+++ b/git-rebase--merge.sh
@@ -67,7 +67,9 @@ call_merge () {
                GIT_MERGE_VERBOSITY=1 && export GIT_MERGE_VERBOSITY
        fi
        test -z "$strategy" && strategy=recursive
-       eval 'git-merge-$strategy' $strategy_opts '"$cmt^" -- "$hd" "$cmt"'
+       # If cmt doesn't have a parent, don't include it as a base
+       base=$(git rev-parse --verify --quiet $cmt^)
+       eval 'git-merge-$strategy' $strategy_opts $base ' -- "$hd" "$cmt"'
        rv=$?
        case "$rv" in
        0)
@@ -105,8 +107,8 @@ finish_rb_merge () {
 # below were not inside any function, and expected to return
 # to the function that dot-sourced us.
 #
-# However, FreeBSD /bin/sh misbehaves on such a construct and
-# continues to run the statements that follow such a "return".
+# However, older (9.x) versions of FreeBSD /bin/sh misbehave on such a
+# construct and continue to run the statements that follow such a "return".
 # As a work-around, we introduce an extra layer of a function
 # here, and immediately call it after defining it.
 git_rebase__merge () {