[3.14] gh-151596: Add missing argument 'size' to pure-Python implementation of `TextI...

(cherry picked from commit 30aeeb375b8f6c1f0eec95f7af60d3d4afa37f33)

Co-authored-by: saber-bit <bryanventura0324@gmail.com>

diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index d0adef08e846f7516277ee4aa9f4762ab53ccd13..cc336d2939443cd3f55507d9ae1b8adcf875b127 100644 (file)
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -1904,7 +1904,7 @@ class TextIOBase(IOBase):
         """Truncate size to pos, where pos is an int."""
         self._unsupported("truncate")
 
-    def readline(self):
+    def readline(self, size=-1, /):
         """Read until newline or EOF.
 
         Returns an empty string if EOF is hit immediately.

diff --git a/Misc/NEWS.d/next/Library/2026-06-18-23-59-46.gh-issue-151596.5ma144.rst b/Misc/NEWS.d/next/Library/2026-06-18-23-59-46.gh-issue-151596.5ma144.rst
new file mode 100644 (file)
index 0000000..17ec134
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-06-18-23-59-46.gh-issue-151596.5ma144.rst
@@ -0,0 +1 @@
+Add missing ``size`` positional argument to the pure-Python implementation of :meth:`io.TextIOBase.readline`.