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hayro-cmap reads CMap streams with hayro-postscript's token scanner, whose object::read skipped each `<<` and `>>` by calling itself again. A CMap holding a long run of `<` or `>` used one stack frame per pair, overflowed the stack and aborted the process. Vendor hayro-postscript 0.1.0 with read() looping over the delimiters instead (from storytold/craft-libs#263), patched in beside hayro-cmap. Four object::tests cover long `<<` and `>>` runs and the skipped delimiters, plain and nested.