# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1435466892 25200
# Node ID 5ceb86818dc5dc06bf13d230c6082617e6188dd4
# Parent  6238dcfc7a78f3cb7a44ff3ed35017d6c7eb9863
bug: Fix a crash when errors occur while processing an asset.

diff -r 6238dcfc7a78 -r 5ceb86818dc5 piecrust/processing/worker.py
--- a/piecrust/processing/worker.py	Sat Jun 27 21:47:48 2015 -0700
+++ b/piecrust/processing/worker.py	Sat Jun 27 21:48:12 2015 -0700
@@ -153,7 +153,7 @@
                 tree_root = builder.build(rel_path)
                 result.flags |= FLAG_PREPARED
         except ProcessingTreeError as ex:
-            result.errors += _get_errors(ex)
+            result.errors = _get_errors(ex)
             return result
 
         # Prepare and run the tree.
@@ -177,7 +177,7 @@
             if isinstance(ex, ProcessorError):
                 ex = ex.__cause__
             # Need to strip out colored errors from external processes.
-            result.errors += _get_errors(ex, strip_colors=True)
+            result.errors = _get_errors(ex, strip_colors=True)
 
         return result