modsys: Add basic sys.exc_info() implementation.

The implementation is very basic and non-compliant and provided solely for
CPython compatibility. The function itself is bad Python2 heritage, its
usage is discouraged.

2 files changed, 23 insertions, 0 deletions

diff --git a/tests/misc/sys_exc_info.py b/tests/misc/sys_exc_info.py
new file mode 100644
index 000000000..1aad6f189
--- /dev/null
+++ b/tests/misc/sys_exc_info.py
@@ -0,0 +1,22 @@
+import sys
+try:
+    sys.exc_info
+except:
+    print("SKIP")
+    sys.exit()
+
+def f():
+    print(sys.exc_info()[0:2])
+
+try:
+    1/0
+except:
+    print(sys.exc_info()[0:2])
+    f()
+
+# MicroPython currently doesn't reset sys.exc_info() value
+# on exit from "except" block.
+#f()
+
+# Recursive except blocks are not handled either - just don't
+# use exc_info() at all!
diff --git a/tests/run-tests b/tests/run-tests
index ebe295c7d..36d9258cf 100755
--- a/tests/run-tests
+++ b/tests/run-tests
@@ -171,6 +171,7 @@ def run_tests(pyb, tests, args):
         skip_tests.add('misc/features.py') # requires raise_varargs
         skip_tests.add('misc/rge_sm.py') # requires yield
         skip_tests.add('misc/print_exception.py') # because native doesn't have proper traceback info
+        skip_tests.add('misc/sys_exc_info.py') # sys.exc_info() is not supported for native
 
     for test_file in tests:
         test_basename = os.path.basename(test_file)