From 7dc5b74229e83876307082712162d48e3124e10b Mon Sep 17 00:00:00 2001
From: Ulf Magnusson <ulfalizer@gmail.com>
Date: Wed, 17 Jan 2018 12:56:13 +0100
Subject: Detect recursive 'source' and print backtrace

Easier to debug than a RecursionError.

Point out in the exception message that a common cause is environment
variables not being set correctly.
---
 testsuite.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'testsuite.py')

diff --git a/testsuite.py b/testsuite.py
index 8306c05..a876f0e 100644
--- a/testsuite.py
+++ b/testsuite.py
@@ -779,6 +779,17 @@ g
     verify_locations([c.syms["COMMENT_HOOK"].nodes[0].next],
                      "tests/Klocation_included:15")
 
+    # Test recursive 'source' detection
+
+    got_syntax_exception = False
+    try:
+        Kconfig("Kconfiglib/tests/Krecursive1")
+    except KconfigSyntaxError:
+        got_syntax_exception = True
+
+    verify(got_syntax_exception,
+           "recursive 'source' did not raise KconfigSyntaxError")
+
 
     print("Testing visibility")
 
-- 
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