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def main(request, response):
headers = [(b"Content-Type", b"application/javascript")]
body = {u'parse-error': u'var foo = function() {;',
u'undefined-error': u'foo.bar = 42;',
u'uncaught-exception': u'throw new DOMException("AbortError");',
u'caught-exception': u'try { throw new Error; } catch(e) {}',
u'import-malformed-script': u'importScripts("malformed-worker.py?parse-error");',
u'import-no-such-script': u'importScripts("no-such-script.js");',
u'top-level-await': u'await Promise.resolve(1);',
u'instantiation-error': u'import nonexistent from "./imported-module-script.js";',
u'instantiation-error-and-top-level-await': u'import nonexistent from "./imported-module-script.js"; await Promise.resolve(1);'}[request.url_parts.query]
return headers, body