-reindex fails if blk0*.dat files read-only #2039
Description
To reproduce: chmod -r datadir/blk0_.dat
Expected behaviour: Reindex read-only block file, and create a new blk0_.dat file when there are new blocks to add.
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To reproduce: chmod -r datadir/blk0_.dat
Expected behaviour: Reindex read-only block file, and create a new blk0_.dat file when there are new blocks to add.