[CrossTU] Handle case when no USR could be generated during Decl search.

Summary:
When searching for a declaration to be loaded the "lookup name" for every
other Decl is computed. If the USR can not be determined here should be
not an assert, instead skip this Decl.

Reviewers: martong

Reviewed By: martong

Subscribers: rnkovacs, dkrupp, Szelethus, gamesh411, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65445

llvm-svn: 368020

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/test/Analysis/func-mapping-test.cpp b/clang/test/Analysis/func-mapping-test.cpp
index f6eeb261da5..5c04d9411fe 100644
--- a/clang/test/Analysis/func-mapping-test.cpp
+++ b/clang/test/Analysis/func-mapping-test.cpp
@@ -41,3 +41,10 @@ union U {
 };
 U u = {.a = 6};
 // CHECK-DAG: c:@u
+
+// No USR can be generated for this.
+// Check for no crash in this case.
+static union {
+  float uf;
+  const int ui;
+};