Ignore operators that are known to be unsupported #6550
Merged
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operatorList.addOp
adds the arguments to the list which is thenpassed as-is by postMessage to the main thread. But since we don't
parse these operations, they are raw PDF objects and may therefore
cause a serialization error.
This is a conservative patch, and only affects operators which are
known to be unsupported. We should ignore all unknown operators,
but I haven't really looked into the consequences of doing that.
Fixes #6549