v2writable: fix parallel termination

I was too aggressively disabling parallelization to speed up
the test suite and broke this :x  Re-enable parallelization
for the v2reindex test so we can catch it later.

1 files changed, 7 insertions, 3 deletions

diff --git a/lib/PublicInbox/V2Writable.pm b/lib/PublicInbox/V2Writable.pm
index c8869bda..51723e55 100644
--- a/lib/PublicInbox/V2Writable.pm
+++ b/lib/PublicInbox/V2Writable.pm
@@ -204,9 +204,13 @@ sub idx_init {
 
                 # need to create all parts before initializing msgmap FD
                 my $max = $self->{partitions} - 1;
-                @{$self->{idx_parts}} = map {
-                        PublicInbox::SearchIdxPart->new($self, $_, $skel);
-                } (0..$max);
+
+                # idx_parts must be visible to all forked processes
+                my $idx = $self->{idx_parts} = [];
+                for my $i (0..$max) {
+                        push @$idx,
+                             PublicInbox::SearchIdxPart->new($self, $i, $skel);
+                }
 
                 # Now that all subprocesses are up, we can open the FD for SQLite:
                 $skel->_msgmap_init->{dbh}->begin_work;