Fix //@line from stdin and (more important) add @line testcase (618652, r=njn).

js/src/jsscan.cpp

@@ -1587,7 +1587,7 @@ TokenStream::getTokenInternal()
                             }
                         }
                         filenameBuf[i] = '\0';
-                        if (c == '\n') {
+                        if (c == EOF || c == '\n') {
                             if (i > 0) {
                                 if (flags & TSF_OWNFILENAME)
                                     cx->free((void *) filename);

js/src/tests/js1_8_5/regress/jstests.list

@@ -57,3 +57,4 @@ script regress-609617.js
 script regress-617405-1.js
 script regress-617405-2.js
 skip-if(!xulRuntime.shell) script regress-618576.js  # uses evalcx
+fails-if(!xulRuntime.shell) script regress-618652.js

js/src/tests/js1_8_5/regress/regress-618652.js

@@ -0,0 +1,10 @@
+options('atline')
+
+var F, L;
+
+eval('//@line 42 "foo"\n' +
+     'try { nosuchname; } catch (e) { F = e.fileName; L = e.lineNumber; }');
+assertEq(F, "foo");
+assertEq(L, 42);
+
+reportCompare(0, 0, "ok");