py: Fix compiler to handle lambdas used as default arguments.

Addresses issue #1709.

2 files changed, 16 insertions, 0 deletions

diff --git a/tests/basics/fun_defargs.py b/tests/basics/fun_defargs.py
index ed25f5739d..1466c44094 100644
--- a/tests/basics/fun_defargs.py
+++ b/tests/basics/fun_defargs.py
@@ -1,3 +1,5 @@
+# testing default args to a function
+
 def fun1(val=5):
     print(val)
 
@@ -18,3 +20,10 @@ try:
     fun2(1, 2, 3, 4)
 except TypeError:
     print("TypeError")
+
+# lambda as default arg (exposes nested behaviour in compiler)
+def f(x=lambda:1):
+    return x()
+print(f())
+print(f(f))
+print(f(lambda:2))
diff --git a/tests/basics/fun_kwonly.py b/tests/basics/fun_kwonly.py
index bdff3a8210..7694c8ddca 100644
--- a/tests/basics/fun_kwonly.py
+++ b/tests/basics/fun_kwonly.py
@@ -57,3 +57,10 @@ def f(a, *b, c):
 f(1, c=2)
 f(1, 2, c=3)
 f(a=1, c=3)
+
+# lambda as kw-only arg (exposes nested behaviour in compiler)
+def f(*, x=lambda:1):
+    return x()
+print(f())
+print(f(x=f))
+print(f(x=lambda:2))