Fix crash when deleting all points from a line.

diff --git a/libs/evoral/src/ControlList.cpp b/libs/evoral/src/ControlList.cpp
index 37e79d70d3a5c4c168d21c666abe145454d6c843..8c98491638b5ab517446b90756fc91f8355065b0 100644 (file)
--- a/libs/evoral/src/ControlList.cpp
+++ b/libs/evoral/src/ControlList.cpp
@@ -64,6 +64,7 @@ ControlList::ControlList (const Parameter& id)
        _default_value = id.normal();
        _lookup_cache.left = -1;
        _lookup_cache.range.first = _events.end();
+       _lookup_cache.range.second = _events.end();
        _search_cache.left = -1;
        _search_cache.first = _events.end();
        _sort_pending = false;
@@ -85,6 +86,7 @@ ControlList::ControlList (const ControlList& other)
        _max_yval = other._max_yval;
        _default_value = other._default_value;
        _lookup_cache.range.first = _events.end();
+       _lookup_cache.range.second = _events.end();
        _search_cache.first = _events.end();
        _sort_pending = false;
        new_write_pass = true;
@@ -109,6 +111,7 @@ ControlList::ControlList (const ControlList& other, double start, double end)
        _max_yval = other._max_yval;
        _default_value = other._default_value;
        _lookup_cache.range.first = _events.end();
+       _lookup_cache.range.second = _events.end();
        _search_cache.first = _events.end();
        _sort_pending = false;
 
@@ -935,7 +938,10 @@ void
 ControlList::mark_dirty () const
 {
        _lookup_cache.left = -1;
+       _lookup_cache.range.first = _events.end();
+       _lookup_cache.range.second = _events.end();
        _search_cache.left = -1;
+       _search_cache.first = _events.end();
 
        if (_curve) {
                _curve->mark_dirty();
@@ -1283,7 +1289,10 @@ ControlList::build_search_cache_if_necessary (double start) const
 {
        /* Only do the range lookup if x is in a different range than last time
         * this was called (or if the search cache has been marked "dirty" (left<0) */
-       if (!_events.empty() && ((_search_cache.left < 0) || (_search_cache.left > start))) {
+       if (_events.empty()) {
+               _search_cache.first = _events.end();
+               _search_cache.left = 0;
+       } else if ((_search_cache.left < 0) || (_search_cache.left > start)) {
 
                const ControlEvent start_point (start, 0);