From d9825793692a41374b184f423994667b663d8526 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Thu, 8 Feb 2018 20:57:03 +0000
Subject: [PATCH] typeid() doesn't seem to downcast, so just check types in the
 take_settings_from methods (#1192).

---
 ChangeLog                 | 5 +++++
 src/lib/content.cc        | 1 +
 src/lib/dcp_content.cc    | 4 +++-
 src/lib/ffmpeg_content.cc | 7 +++++--
 src/lib/film.cc           | 4 +---
 5 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 91263bed6..cd3e90e1d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-08  Carl Hetherington  <cth@carlh.net>
+
+	* Fix crash on adding content to a project created from a template
+	in some cases (#1192).
+
 2018-02-07  Carl Hetherington  <cth@carlh.net>
 
 	* Version 2.11.50 released.
diff --git a/src/lib/content.cc b/src/lib/content.cc
index 7b1e630a6..f2380653f 100644
--- a/src/lib/content.cc
+++ b/src/lib/content.cc
@@ -420,6 +420,7 @@ Content::add_properties (list<UserProperty>& p) const
 	}
 }
 
+/** Take settings from the given content if it is of the correct type */
 void
 Content::take_settings_from (shared_ptr<const Content> c)
 {
diff --git a/src/lib/dcp_content.cc b/src/lib/dcp_content.cc
index a6424874a..ad489917d 100644
--- a/src/lib/dcp_content.cc
+++ b/src/lib/dcp_content.cc
@@ -543,7 +543,9 @@ void
 DCPContent::take_settings_from (shared_ptr<const Content> c)
 {
 	shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (c);
-	DCPOMATIC_ASSERT (dc);
+	if (!dc) {
+		return;
+	}
 
 	_reference_video = dc->_reference_video;
 	_reference_audio = dc->_reference_audio;
diff --git a/src/lib/ffmpeg_content.cc b/src/lib/ffmpeg_content.cc
index 64da0b1af..06ed5a801 100644
--- a/src/lib/ffmpeg_content.cc
+++ b/src/lib/ffmpeg_content.cc
@@ -606,8 +606,11 @@ FFmpegContent::ffmpeg_audio_streams () const
 void
 FFmpegContent::take_settings_from (shared_ptr<const Content> c)
 {
-	Content::take_settings_from (c);
-
 	shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (c);
+	if (!fc) {
+		return;
+		}
+
+	Content::take_settings_from (c);
 	_filters = fc->_filters;
 }
diff --git a/src/lib/film.cc b/src/lib/film.cc
index 2b045f5c4..db1cb39aa 100644
--- a/src/lib/film.cc
+++ b/src/lib/film.cc
@@ -1086,9 +1086,7 @@ Film::add_content (shared_ptr<Content> c)
 	if (_template_film) {
 		/* Take settings from the first piece of content of c's type in _template */
 		BOOST_FOREACH (shared_ptr<Content> i, _template_film->content()) {
-			if (typeid(i.get()) == typeid(c.get())) {
-				c->take_settings_from (i);
-			}
+			c->take_settings_from (i);
 		}
 	}
 
-- 
2.30.2