test C = $(git cat-file commit HEAD^ | sed -ne \$p)
'
+test_expect_success 'the first command cannot be a fixup' '
+ rebase_setup_and_clean fixup-first &&
+
+ cat >orig <<-EOF &&
+ fixup $(git log -1 --format="%h %s" B)
+ pick $(git log -1 --format="%h %s" C)
+ EOF
+
+ (
+ set_replace_editor orig &&
+ test_must_fail git rebase -i A 2>actual
+ ) &&
+ grep "cannot .fixup. without a previous commit" actual &&
+ grep "You can fix this with .git rebase --edit-todo.." actual &&
+ # verify that the todo list has not been truncated
+ grep -v "^#" .git/rebase-merge/git-rebase-todo >actual &&
+ test_cmp orig actual &&
+
+ test_must_fail git rebase --edit-todo 2>actual &&
+ grep "cannot .fixup. without a previous commit" actual &&
+ grep "You can fix this with .git rebase --edit-todo.." actual &&
+ # verify that the todo list has not been truncated
+ grep -v "^#" .git/rebase-merge/git-rebase-todo >actual &&
+ test_cmp orig actual
+'
+
test_expect_success 'tabs and spaces are accepted in the todolist' '
rebase_setup_and_clean indented-comment &&
write_script add-indent.sh <<-\EOF &&