fix: aggregate pre-header xref offset robustness#2
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vitormattos merged 2 commits intoApr 24, 2026
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Some PDFs include bytes before the %PDF- header while still using absolute xref offsets from the beginning of the file. The parser trimmed data before %PDF-, which shifted offsets and caused xref lookup failures. This manifested as an Invalid object reference error in the veraPDF corpus header case. Changes: - Keep original byte layout in RawDataParser::parseData - Add stricter trailer key matching for /Size /Root /Encrypt /Info /Prev - Add defensive handling in xref stream resolution when startxref is near, but not exactly at, the xref stream object - Add regression fixture and integration test Regression fixture: - samples/bugs/PullRequestInvalidObjectReference.pdf Test: - DocumentIssueFocusTest::testParseFileWithCompressedObjRefInXrefStream Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>
Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>
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