Fix infinite regress when inspecting <string> or <stdin> frames.
diff --git a/Lib/inspect.py b/Lib/inspect.py
index 2e4d987..4b2058e 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -353,7 +353,13 @@
if 'b' in mode and string.lower(filename[-len(suffix):]) == suffix:
# Looks like a binary file. We want to only return a text file.
return None
- if os.path.exists(filename) or hasattr(getmodule(object), '__loader__'):
+ if os.path.exists(filename):
+ return filename
+ # Ugly but necessary - '<stdin>' and '<string>' mean that getmodule()
+ # would infinitely recurse, because they're not real files nor loadable
+ # Note that this means that writing a PEP 302 loader that uses '<'
+ # at the start of a filename is now not a good idea. :(
+ if filename[:1]!='<' and hasattr(getmodule(object), '__loader__'):
return filename
def getabsfile(object):