From 81a9987f5385823951eaa023c2839822a8fffe1c Mon Sep 17 00:00:00 2001
From: pubpub-zz <4083478+pubpub-zz@users.noreply.github.com>
Date: Sun, 5 Jun 2022 16:52:04 +0200
Subject: [PATCH] ROB: Fix some conversion errors on non conform PDF (#932)

Issue: Due to an error in the stream pointing onto \n before the object, a ValueError (invalid literal for int() with base 10: b'') was raised

Fix: Move to next non whitespace

Closes #925
---
 PyPDF2/_reader.py    |  2 ++
 tests/test_reader.py | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/PyPDF2/_reader.py b/PyPDF2/_reader.py
index 8c9661393..e82d8b0e3 100644
--- a/PyPDF2/_reader.py
+++ b/PyPDF2/_reader.py
@@ -980,6 +980,8 @@ def _get_object_from_stream(
             if self.strict and idx != i:
                 raise PdfReadError("Object is in wrong index.")
             stream_data.seek(int(obj_stm["/First"] + offset), 0)  # type: ignore
+            read_non_whitespace(stream_data)        # to cope with some case where the 'pointer' is on a white space
+            stream_data.seek(-1, 1)
             try:
                 obj = read_object(stream_data, self)
             except PdfStreamError as exc:
diff --git a/tests/test_reader.py b/tests/test_reader.py
index d84a9fdd1..397331918 100644
--- a/tests/test_reader.py
+++ b/tests/test_reader.py
@@ -2,6 +2,7 @@
 import os
 import time
 from io import BytesIO
+import urllib.request
 
 import pytest
 
@@ -666,3 +667,16 @@ def test_convertToInt_deprecated():
         match=msg,
     ):
         assert convertToInt(b"\x01", 8) == 1
+
+
+def test_iss925():
+    reader = PdfReader(BytesIO(urllib.request.urlopen(
+        "https://github.com/py-pdf/PyPDF2/files/8796328/1.pdf").read()))
+
+    for page_sliced in reader.pages:
+        page_object = page_sliced.get_object()
+        # Extracts the PDF's Annots (Annotations and Commenting):
+        annots = page_object.get("/Annots")
+        if annots is not None:
+            for annot in annots:
+                annot.get_object()