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diff --git a/js/src/tests/js1_5/extensions/regress-346494-01.js b/js/src/tests/js1_5/extensions/regress-346494-01.js
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@@ -0,0 +1,90 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 346494;
+var summary = 'various try...catch tests';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+ enterFunc ('test');
+ printBugNumber(BUGNUMBER);
+ printStatus (summary);
+
+ var pfx = "(function (x) {try {throw x}",
+ cg1 = " catch (e if e === 42) {var v = 'catch guard 1 ' + e; actual += v + ','; print(v);}"
+ cg2 = " catch (e if e === 43) {var v = 'catch guard 2 ' + e; actual += v + ','; print(v);}"
+ cat = " catch (e) {var v = 'catch all ' + e; actual += v + ','; print(v);}"
+ fin = " finally{var v = 'fin'; actual += v + ','; print(v)}",
+ end = "})";
+
+ var exphash = {
+ pfx: "(function (y) { var result = ''; y = y + ',';",
+ cg1: "result += (y === '42,') ? ('catch guard 1 ' + y):'';",
+ cg2: "result += (y === '43,') ? ('catch guard 2 ' + y):'';",
+ cat: "result += /catch guard/.test(result) ? '': ('catch all ' + y);",
+ fin: "result += 'fin,';",
+ end: "return result;})"
+ };
+
+ var src = [
+ pfx + fin + end,
+ pfx + cat + end,
+ pfx + cat + fin + end,
+ pfx + cg1 + end,
+ pfx + cg1 + fin + end,
+ pfx + cg1 + cat + end,
+ pfx + cg1 + cat + fin + end,
+ pfx + cg1 + cg2 + end,
+ pfx + cg1 + cg2 + fin + end,
+ pfx + cg1 + cg2 + cat + end,
+ pfx + cg1 + cg2 + cat + fin + end,
+ ];
+
+ var expsrc = [
+ exphash.pfx + exphash.fin + exphash.end,
+ exphash.pfx + exphash.cat + exphash.end,
+ exphash.pfx + exphash.cat + exphash.fin + exphash.end,
+ exphash.pfx + exphash.cg1 + exphash.end,
+ exphash.pfx + exphash.cg1 + exphash.fin + exphash.end,
+ exphash.pfx + exphash.cg1 + exphash.cat + exphash.end,
+ exphash.pfx + exphash.cg1 + exphash.cat + exphash.fin + exphash.end,
+ exphash.pfx + exphash.cg1 + exphash.cg2 + exphash.end,
+ exphash.pfx + exphash.cg1 + exphash.cg2 + exphash.fin + exphash.end,
+ exphash.pfx + exphash.cg1 + exphash.cg2 + exphash.cat + exphash.end,
+ exphash.pfx + exphash.cg1 + exphash.cg2 + exphash.cat + exphash.fin + exphash.end,
+ ];
+
+ for (var i in src) {
+ print("\n=== " + src[i]);
+ var f = eval(src[i]);
+ print(src[i]);
+ var exp = eval(expsrc[i]);
+ // dis(f);
+ print('decompiling: ' + f);
+
+ actual = '';
+ try { expect = exp(42); f(42) } catch (e) { print('tried f(42), caught ' + e) }
+ reportCompare(expect, actual, summary);
+
+ actual = '';
+ try { expect = exp(43); f(43) } catch (e) { print('tried f(43), caught ' + e) }
+ reportCompare(expect, actual, summary);
+
+ actual = '';
+ try { expect = exp(44); f(44) } catch (e) { print('tried f(44), caught ' + e) }
+ reportCompare(expect, actual, summary);
+ }
+
+
+ exitFunc ('test');
+}