The Lexer constructor expects a source location at the start of the

file buffer, not at the start of lexing.

Fixes assertion hit in format diagnostics. rdar://11418366

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156647 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 18 insertions, 0 deletions

diff --git a/test/PCH/format-strings.c b/test/PCH/format-strings.c
new file mode 100644
index 0000000000..7198c4d3a2
--- /dev/null
+++ b/test/PCH/format-strings.c
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -D FOOBAR="\"\"" %s -emit-pch -o %t.pch
+// RUN: %clang_cc1 -D FOOBAR="\"\"" %s -include-pch %t.pch
+
+// rdar://11418366
+
+#ifndef HEADER
+#define HEADER
+
+extern int printf(const char *restrict, ...);
+#define LOG printf(FOOBAR "%f", __LINE__)
+
+#else
+
+void foo() {
+  LOG;
+}
+
+#endif