From: johnslavik <bartosz@ilikepython.com>
Date: Sun, 7 Dec 2025 13:26:18 +0000 (+0100)
Subject: Pick target depending on preconditions
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70507701b780edd9aa5a7d8b1dc047dd56356766;p=thirdparty%2FPython%2Fcpython.git

Pick target depending on preconditions
---

diff --git a/Lib/pdb.py b/Lib/pdb.py
index 1506e3d47098..5729624ba139 100644
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -183,15 +183,17 @@ class _ExecutableTarget:
 
 class _ScriptTarget(_ExecutableTarget):
     def __init__(self, target):
-        self._target = os.path.realpath(target)
-
-        if not os.path.exists(self._target):
+        if not os.path.exists(target):
             print(f'Error: {target} does not exist')
             sys.exit(1)
-        if os.path.isdir(self._target):
+        if os.path.isdir(target):
             print(f'Error: {target} is a directory')
             sys.exit(1)
 
+        # Be careful with realpath to support pseudofilesystems (GH-142315).
+        realpath = os.path.realpath(target)
+        self._target = realpath if os.path.exists(realpath) else target
+
         # If safe_path(-P) is not set, sys.path[0] is the directory
         # of pdb, and we should replace it with the directory of the script
         if not sys.flags.safe_path:
diff --git a/Misc/NEWS.d/next/Library/2025-12-07-02-36-24.gh-issue-142315.02o5E_.rst b/Misc/NEWS.d/next/Library/2025-12-07-02-36-24.gh-issue-142315.02o5E_.rst
new file mode 100644
index 000000000000..b3941fdd5231
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-12-07-02-36-24.gh-issue-142315.02o5E_.rst
@@ -0,0 +1 @@
+Pdb can run scripts from pseudofiles. Patch by Bartosz Sławecki.