analyzer: Clean up collections for check_variables() after finished

diff --git a/vala/valaflowanalyzer.vala b/vala/valaflowanalyzer.vala
index 1fd580a46366458a754554a8d49a50af7a25d8fd..7f362783e485b01f7aa278b49b94011c17c00769 100644 (file)
--- a/vala/valaflowanalyzer.vala
+++ b/vala/valaflowanalyzer.vala
@@ -90,6 +90,7 @@ public class Vala.FlowAnalyzer : CodeVisitor {
        private bool unreachable_reported;
        private List<JumpTarget> jump_stack = new ArrayList<JumpTarget> ();
 
+       // check_variables
        Map<Symbol, List<Variable>> var_map;
        Set<Variable> used_vars;
        Map<Variable, PhiFunction> phi_functions;
@@ -431,6 +432,10 @@ public class Vala.FlowAnalyzer : CodeVisitor {
                                }
                        }
                }
+
+               phi_functions = null;
+               used_vars = null;
+               var_map = null;
        }
 
        void check_block_variables (BasicBlock block) {