Issue #13886: Fix input() to not strip out supposedly-invalid input bytes.

Also fix sporadic failures in test_builtin due to dependence on whether the
readline module has previously been imported.

1 files changed, 7 insertions, 0 deletions

diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index bf005c5..704fe9c 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -20,6 +20,13 @@ try:
     import pty, signal
 except ImportError:
     pty = signal = None
+# Importing this module has the side-effect of changing the behavior of input().
+# Ensure that we always use the readline version (if available), so we don't get
+# different results depending on what other tests have already imported.
+try:
+    import readline
+except ImportError:
+    pass
 
 
 class Squares: