I let this sit for several months because there were other things to
potentially include, but that hasn't happened, so here is the fix for
the bug reported in mid:87wmtvcor5.fsf@alyssa.is

Where to obtain notmuch 0.38.3
===========================
  https://notmuchmail.org/releases/notmuch-0.38.3.tar.xz

Which can be verified with:

  https://notmuchmail.org/releases/notmuch-0.38.3.tar.xz.sha256.asc
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  https://notmuchmail.org/releases/notmuch-0.38.3.tar.xz.asc
  (signed by David Bremner)

What's new in notmuch 0.38.3
=========================

CLI
---

Fix a bug in configuration code that caused the notmuch command to
erroneously report "Error: could not locate database" under some
circumstances.

What is notmuch
===============
Notmuch is a system for indexing, searching, reading, and tagging
large collections of email messages in maildir or mh format. It uses
the Xapian library to provide fast, full-text search with a convenient
search syntax.

For more about notmuch, see https://notmuchmail.org