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Merge #12367: Fix two fast-shutdown bugs

Description

Merge #12367: Fix two fast-shutdown bugs

Summary:
dd2de47 Fix fast-shutdown crash if genesis block was not loaded (Matt Corallo)
1c9394a Fix fast-shutdown hang on ThreadImport+GenesisWait (Matt Corallo)

Pull request description:

The second commit is a much simpler alternative fix for the issue fixed in #12349. To test I made ShutdownRequested() always StartShutdown() after a certain number of calls, which turned up one other hang, fixed in the first commit.

Tree-SHA512: 86bde6ac4b8b4e2cb99fff87dafeed02c0d9514acee6d94455637fb2da9ffc274b5ad31b0a6b9f5bd7b700ae35395f28ddb14ffc65ddda3619aa28df28a5607d

Backport of Core PR 12367
https://github.com/bitcoin/bitcoin/pull/12367/files
Completes T624
Depends on T625

Test Plan:
make check
Testing instructions in the original PR are not very clear. I manually tested early shutdown with various delays on bitcoind and observed no unexpected behavior.

Reviewers: deadalnix, Fabien, #bitcoin_abc

Reviewed By: Fabien, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D2906

Details

Provenance
Wladimir J. van der Laan <laanwj@gmail.com>Authored on Feb 8 2018, 07:40
jasonbcoxCommitted on May 6 2019, 16:13
jasonbcoxPushed on May 6 2019, 19:32
Reviewer
Restricted Project
Differential Revision
D2906: Merge #12367: Fix two fast-shutdown bugs
Parents
rSTAGINGe87cb7d7a375: Merge #11238: Add assertions before potential null deferences
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