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From e607286e070675498fcd5a7ab73bc3da533f9eea Mon Sep 17 00:00:00 2001
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From: Balint Reczey <balint.reczey@canonical.com>
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Date: Wed, 22 Apr 2020 09:51:53 +0200
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Subject: [PATCH] shared: Don't try calling NULL callback in
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 bus_wait_for_units_clear
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BugLink: https://bugs.launchpad.net/bugs/1870930
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(cherry picked from commit 9f656373082cb13542b877b4f5cb917ef5ff329c)
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Related: #1830861
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---
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 src/shared/bus-wait-for-units.c | 3 ++-
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 1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/src/shared/bus-wait-for-units.c b/src/shared/bus-wait-for-units.c
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index de15da1620..63ba3fd422 100644
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--- a/src/shared/bus-wait-for-units.c
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+++ b/src/shared/bus-wait-for-units.c
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@@ -91,7 +91,8 @@ static void bus_wait_for_units_clear(BusWaitForUnits *d) {
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         while ((item = hashmap_first(d->items))) {
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                 d->current = item;
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-                item->unit_callback(d, item->bus_path, false, item->userdata);
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+                if (item->unit_callback)
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+                        item->unit_callback(d, item->bus_path, false, item->userdata);
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                 wait_for_item_free(item);
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         }
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