[vala/staging: 4/4] codegen: Don't leak GLib.Value when implicitly unboxing it

[Rico Tzschichholz <ricotz src gnome org>]

commit 3e3c80f2cb066c2ff21d3890e6dd53f82f003239
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Feb 3 13:40:23 2021 +0100

    codegen: Don't leak GLib.Value when implicitly unboxing it
    
    Found by -fsanitize=address

 codegen/valagvaluemodule.vala | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/codegen/valagvaluemodule.vala b/codegen/valagvaluemodule.vala
index 0429085e6..f13022c26 100644
--- a/codegen/valagvaluemodule.vala
+++ b/codegen/valagvaluemodule.vala
@@ -44,6 +44,17 @@ public class Vala.GValueModule : GAsyncModule {
                }
                ccall.add_argument (gvalue);
 
+               if (value_type.is_disposable ()) {
+                       var temp_var = get_temp_variable (value_type, true, expr, false);
+                       emit_temp_var (temp_var);
+                       var temp_ref = get_variable_cexpression (temp_var.name);
+                       ccode.add_assignment (temp_ref, get_cvalue (expr.inner));
+
+                       // value needs to be kept alive until the end of this block
+                       assert (current_symbol is Block);
+                       ((Block) current_symbol).add_local_variable (temp_var);
+               }
+
                CCodeExpression rv;
                if (target_type is ArrayType) {
                        var temp_var = get_temp_variable (target_type, true, expr, false);