Merge pull request #5585 from 9rnsr/fix15835

Issue 15835 - Segfault with typeid call from lazy argument

src/apply.d

@@ -9,6 +9,7 @@
 module ddmd.apply;
 
 import ddmd.arraytypes;
+import ddmd.dtemplate;
 import ddmd.expression;
 import ddmd.visitor;
 
@@ -73,6 +74,11 @@ public:
         doCond(e.thisexp) || doCond(e.newargs) || doCond(e.arguments) || applyTo(e);
     }
 
+    override void visit(TypeidExp e)
+    {
+        doCond(isExpression(e.obj)) || applyTo(e);
+    }
+
     override void visit(UnaExp e)
     {
         doCond(e.e1) || applyTo(e);

src/delegatize.d

@@ -8,6 +8,7 @@
 
 module ddmd.delegatize;
 
+import core.stdc.stdio;
 import ddmd.apply;
 import ddmd.declaration;
 import ddmd.dscope;

test/runnable/lazy.d

@@ -267,6 +267,26 @@ void test9109()
     foo({ return 1; }, { return 3+x; }, dg, null);
 }
 
+/*********************************************************/
+// 15835
+
+class C15835 {}
+
+string fun15835(lazy string s)
+{
+    return s;
+}
+
+void test15835()
+{
+    auto c = new C15835;
+    auto s = typeid(c).name;
+    assert(fun15835(typeid(c).name) == s);
+
+    auto a = [c];
+    assert(fun15835(typeid(a[0]).name) == s);
+}
+
 /*********************************************************/
 
 int main()
@@ -283,6 +303,7 @@ int main()
     test5750b();
     test6682();
     test9109();
+    test15835();
 
     printf("Success\n");
     return 0;