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Grzegorz MartensandClaude Opus 5.5
4f107a6f40
Review of the walk's read of a form's `/Matrix`. Through `Document::resolve` it followed a reference to a reference, for the matrix and for each entry, as the app's renderer does; Poppler doesn't, and reads such a matrix as the identity and such an entry as 0. With `/Matrix [1 0 0 1 0 8 0 R]`, `8 0 obj 9 0 R` and `9 0 obj 200`, a mark where Poppler shows the text applied with success and left it in the file, where `main`, reading any entry by reference as the identity, removed it. `matrix_of` now follows each reference one hop, and a reference to a reference fails as a malformed matrix: where the content draws can't be told, so Apply refuses the page, as for a matrix that isn't six numbers. The refusal now says "isn't six numbers given directly or through one reference", and `matrix_of`'s doc names the appearances it reads, not patterns. The proof, which reads the matrix of forms and appearances with it, treats such a matrix as malformed too. Test: `a_form_whose_matrix_goes_through_a_reference_to_a_reference_is_refused` (an entry and the whole matrix, with a mark where either reader draws the text). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01AmsdeUCdTaD72jkDw2pJKY