[vala/staging: 1/2] analyzer: Clean up collections for check_variables() after finished

[Rico Tzschichholz <ricotz src gnome org>]

commit 94a9765a364db053ee8d4487e1d9f27ce76f9737
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Thu Apr 5 20:25:51 2018 +0200

    analyzer: Clean up collections for check_variables() after finished

 vala/valaflowanalyzer.vala |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/vala/valaflowanalyzer.vala b/vala/valaflowanalyzer.vala
index 1fd580a..7f36278 100644
--- 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) {