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src/qt/bitcoin-qt dumps core when run with --help
<!--- What behavior did you expect? -->
<!--- What was the actual behavior (provide screenshots if the issue is GUI-related)? -->
Segmentation fault (core dumped)
<!--- How reliably can you reproduce the issue, what are the steps to do so? -->
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Built from current source on Linux.
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Starting happening after commit c7ec5243892c38f9f77781b0e24a237942e7c776
Does not happen with {bitcoind, bitcoin-tx, bitcoin-cli} --help
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