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https://issues.apache.org/jira/browse/PDFBOX-5965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17947312#comment-17947312
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Tilman Hausherr commented on PDFBOX-5965:
-----------------------------------------
I haven't been able to fix it, but here's a test that fails
{code:java}
@Test
void testRewindAcrossBuffers() throws IOException
{
byte[] ba = new byte[4096 + 5];
int rewSize = 7;
byte testVal = 123;
ba[ba.length - rewSize] = testVal;
ByteArrayInputStream bais = new ByteArrayInputStream(ba);
try (RandomAccessRead rar = new
NonSeekableRandomAccessReadInputStream(bais))
{
int len = rar.read(new byte[ba.length - rewSize]);
assertEquals(ba.length - rewSize, len);
len = rar.read(new byte[rewSize]);
assertEquals(rewSize, len);
int by = rar.read();
assertEquals(-1, by);
assertTrue(rar.isEOF());
rar.rewind(len);
by = rar.read(); // went ArrayIndexOutOfBoundsException here
assertEquals(testVal, by);
}
}
{code}
> Rewind in NonSeekableRandomAccessReadInputStream malfunction near end of file
> -----------------------------------------------------------------------------
>
> Key: PDFBOX-5965
> URL: https://issues.apache.org/jira/browse/PDFBOX-5965
> Project: PDFBox
> Issue Type: Bug
> Components: IO
> Affects Versions: 3.0.4 PDFBox
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Major
> Labels: regression
> Fix For: 3.0.5 PDFBox, 4.0.0
>
> Attachments: POPPLER-208-p2.pdf
>
>
> A user (memo for me: on 3.3.2025 16:58) has contacted me with a problem that
> involves a token count difference of parsed content stream tokens between
> PDFBox 2.0.33 and 3.0.4. It happens when an inline image is close to the end
> of the file, and is followed by two "Q" operators. The two "Q" operators are
> ignored despite the rewind() in PDFStreamParser. The problem goes away by
> replacing {{new NonSeekableRandomAccessReadInputStream(decoderStream)}} with
> {{new RandomAccessReadBuffer(decoderStream)}} in {{PDPage}}. It does not
> happen in PDFBox 3.0.2.
> I have a file that reproduces the problem but I doubt I can share it, I will
> try to find or create something.
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