diff --git a/llvm/lib/MC/MCParser/AsmLexer.cpp b/llvm/lib/MC/MCParser/AsmLexer.cpp
--- a/llvm/lib/MC/MCParser/AsmLexer.cpp
+++ b/llvm/lib/MC/MCParser/AsmLexer.cpp
@@ -715,7 +715,7 @@
   if (CurChar == EOF && !IsAtStartOfStatement && EndStatementAtEOF) {
     IsAtStartOfLine = true;
     IsAtStartOfStatement = true;
-    return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
+    return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 0));
   }
   IsAtStartOfLine = false;
   bool OldIsAtStartOfStatement = IsAtStartOfStatement;
diff --git a/llvm/test/MC/AsmParser/Inputs/no-newline-at-end-of-file.s b/llvm/test/MC/AsmParser/Inputs/no-newline-at-end-of-file.s
new file mode 100644
--- /dev/null
+++ b/llvm/test/MC/AsmParser/Inputs/no-newline-at-end-of-file.s
@@ -0,0 +1 @@
+.text
\ No newline at end of file
diff --git a/llvm/test/MC/AsmParser/preserve-comments.s b/llvm/test/MC/AsmParser/preserve-comments.s
--- a/llvm/test/MC/AsmParser/preserve-comments.s
+++ b/llvm/test/MC/AsmParser/preserve-comments.s
@@ -1,5 +1,6 @@
 	#RUN: llvm-mc -preserve-comments -n -triple i386-linux-gnu < %s > %t
 	#RUN: diff -b %s %t
+	#RUN: llvm-mc -preserve-comments -n -triple i386-linux-gnu < %p/Inputs/no-newline-at-end-of-file.s | FileCheck %s
 	.text
 
 foo:	#Comment here
@@ -11,3 +12,6 @@
 	#endif
 	.ident	"clang version 3.9.0"
 	.section	".note.GNU-stack","",@progbits
+
+	#Confirm we don't crash on inputs without a terminating newline.
+	#CHECK: .text