From c6b3fc512fee5f4dd221be07dda65889104313ff Mon Sep 17 00:00:00 2001
From: Matthew Brown <github@muglug.com>
Date: Sun, 10 Feb 2019 16:32:30 -0500
Subject: [PATCH] =?UTF-8?q?Don=E2=80=99t=20throw=20exception=20when=20igno?=
 =?UTF-8?q?ring=20trait=20absence?=
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---
 src/Psalm/Internal/Analyzer/ClassAnalyzer.php | 7 ++++++-
 tests/TraitTest.php                           | 7 +++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/Psalm/Internal/Analyzer/ClassAnalyzer.php b/src/Psalm/Internal/Analyzer/ClassAnalyzer.php
index ed4db33ef..5f087dd3a 100644
--- a/src/Psalm/Internal/Analyzer/ClassAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/ClassAnalyzer.php
@@ -636,7 +636,12 @@ class ClassAnalyzer extends ClassLikeAnalyzer
                         $this->source->getAliases()
                     );
 
-                    $trait_file_analyzer = $project_analyzer->getFileAnalyzerForClassLike($fq_trait_name);
+                    try {
+                        $trait_file_analyzer = $project_analyzer->getFileAnalyzerForClassLike($fq_trait_name);
+                    } catch (\Exception $e) {
+                        continue;
+                    }
+
                     $trait_node = $codebase->classlikes->getTraitNode($fq_trait_name);
                     $trait_aliases = $codebase->classlikes->getTraitAliases($fq_trait_name);
                     $trait_analyzer = new TraitAnalyzer(
diff --git a/tests/TraitTest.php b/tests/TraitTest.php
index 6a1f831c6..26e8eef54 100644
--- a/tests/TraitTest.php
+++ b/tests/TraitTest.php
@@ -780,6 +780,13 @@ class TraitTest extends TestCase
                         }
                     }'
             ],
+            'noCrashOnUndefinedIgnoredTrait' => [
+                '<?php
+                    /** @psalm-suppress UndefinedTrait */
+                    class C {
+                        use UnknownTrait;
+                    }'
+            ],
         ];
     }