From 5fbcb711eb4641bbfc40f28b8d15b59d4485d37c Mon Sep 17 00:00:00 2001
From: Stefan Zager <szager@gmail.com>
Date: Thu, 14 Apr 2011 04:22:03 +0000
Subject: [PATCH] Fix for bug 3286333: infinite recursion with mutual "using
 namespace" clauses.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12640 626c5289-ae23-0410-ae9c-e8d60b6d4f22
---
 CHANGES.current                            |  3 +++
 Examples/test-suite/common.mk              |  1 +
 Examples/test-suite/using_namespace_loop.i | 14 ++++++++++++++
 Source/Swig/symbol.c                       |  1 +
 Source/Swig/typesys.c                      |  8 ++++++++
 5 files changed, 27 insertions(+)
 create mode 100644 Examples/test-suite/using_namespace_loop.i

diff --git a/CHANGES.current b/CHANGES.current
index 8b087c75b..ad26146fc 100644
--- a/CHANGES.current
+++ b/CHANGES.current
@@ -4,6 +4,9 @@ See the RELEASENOTES file for a summary of changes in each release.
 
 Version 2.0.4 (in progress)
 ===========================
+2011-04-13: szager
+	    Fixed bug 3286333: infite recursion with mutual 'using namespace' clauses.
+
 2011-04-12: szager
 	    Fixed bug 1163440: vararg typemaps.
 
diff --git a/Examples/test-suite/common.mk b/Examples/test-suite/common.mk
index 9f15df50f..5b2500e03 100644
--- a/Examples/test-suite/common.mk
+++ b/Examples/test-suite/common.mk
@@ -425,6 +425,7 @@ CPP_TEST_CASES += \
 	using_extend \
 	using_inherit \
 	using_namespace \
+	using_namespace_loop \
 	using_pointers \
 	using_private \
 	using_protected \
diff --git a/Examples/test-suite/using_namespace_loop.i b/Examples/test-suite/using_namespace_loop.i
new file mode 100644
index 000000000..9fddca8e6
--- /dev/null
+++ b/Examples/test-suite/using_namespace_loop.i
@@ -0,0 +1,14 @@
+%module using_namespace_loop
+
+%inline {
+namespace A {}
+
+namespace B {
+using namespace A;
+}
+
+namespace A {
+using namespace B;
+typedef Foo Bar;
+}
+}
diff --git a/Source/Swig/symbol.c b/Source/Swig/symbol.c
index b16573606..0dc47c48c 100644
--- a/Source/Swig/symbol.c
+++ b/Source/Swig/symbol.c
@@ -960,6 +960,7 @@ static Node *_symbol_lookup(const String *name, Symtab *symtab, int (*check) (No
     Delete(dname);
     if (n)
       return n;
+    Setmark(symtab, 1);
   }
 
   inherit = Getattr(symtab, "inherit");
diff --git a/Source/Swig/typesys.c b/Source/Swig/typesys.c
index 153bbbace..f13c84a84 100644
--- a/Source/Swig/typesys.c
+++ b/Source/Swig/typesys.c
@@ -415,9 +415,14 @@ void SwigType_print_scope(void) {
 
 static Typetab *SwigType_find_scope(Typetab *s, const SwigType *nameprefix) {
   Typetab *ss;
+  Typetab *s_orig = s;
   String *nnameprefix = 0;
   static int check_parent = 1;
 
+  if (Getmark(s))
+    return 0;
+  Setmark(s, 1);
+
   /*  Printf(stdout,"find_scope: %x(%s) '%s'\n", s, Getattr(s,"name"), nameprefix); */
 
   if (SwigType_istemplate(nameprefix)) {
@@ -443,6 +448,7 @@ static Typetab *SwigType_find_scope(Typetab *s, const SwigType *nameprefix) {
     if (s) {
       if (nnameprefix)
 	Delete(nnameprefix);
+      Setmark(s_orig, 0);
       return s;
     }
     if (!s) {
@@ -462,6 +468,7 @@ static Typetab *SwigType_find_scope(Typetab *s, const SwigType *nameprefix) {
 	  if (s) {
 	    if (nnameprefix)
 	      Delete(nnameprefix);
+	    Setmark(s_orig, 0);
 	    return s;
 	  }
 	}
@@ -473,6 +480,7 @@ static Typetab *SwigType_find_scope(Typetab *s, const SwigType *nameprefix) {
   }
   if (nnameprefix)
     Delete(nnameprefix);
+  Setmark(s_orig, 0);
   return 0;
 }