Make multi-line comments not count when checking whether --> is first on a line.

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index 08f117b3513c7657b6dabc4b7a7e26c6d4a2b2f5..2b707fcc70a475c3170ca1cd4f8183968c0101f7 100755
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -137,8 +137,9 @@ TEST(ScanHTMLEndComments) {
   // Regression test. See:
   //    http://code.google.com/p/chromium/issues/detail?id=53548
   // Tests that --> is correctly interpreted as comment-to-end-of-line if there
-  // is only whitespace before it on the line, even after a multiline-comment
-  // comment. This was not the case if it occurred before the first real token
+  // is only whitespace before it on the line (with comments considered as
+  // whitespace, even a multiline-comment containing a newline).
+  // This was not the case if it occurred before the first real token
   // in the input.
   const char* tests[] = {
       // Before first real token.
@@ -152,6 +153,16 @@ TEST(ScanHTMLEndComments) {
       NULL
   };
 
+  const char* fail_tests[] = {
+      "x --> is eol-comment\nvar y = 37;\n",
+      "\"\\n\" --> is eol-comment\nvar y = 37;\n",
+      "x/* precomment */ --> is eol-comment\nvar y = 37;\n",
+      "x/* precomment\n */ --> is eol-comment\nvar y = 37;\n",
+      "var x = 42; --> is eol-comment\nvar y = 37;\n",
+      "var x = 42; /* precomment\n */ --> is eol-comment\nvar y = 37;\n",
+      NULL
+  };
+
   // Parser/Scanner needs a stack limit.
   int marker;
   i::Isolate::Current()->stack_guard()->SetStackLimit(
@@ -163,6 +174,13 @@ TEST(ScanHTMLEndComments) {
     CHECK(data != NULL && !data->HasError());
     delete data;
   }
+
+  for (int i = 0; fail_tests[i]; i++) {
+    v8::ScriptData* data =
+        v8::ScriptData::PreCompile(fail_tests[i], i::StrLength(fail_tests[i]));
+    CHECK(data == NULL || data->HasError());
+    delete data;
+  }
 }