Bug 177563 - [High Sierra WK1] LayoutTest http/tests/xmlhttprequest/response-empty-arraybuffer.html is failing
Summary: [High Sierra WK1] LayoutTest http/tests/xmlhttprequest/response-empty-arraybu...
Status: RESOLVED INVALID
Alias: None
Product: WebKit
Classification: Unclassified
Component: Page Loading (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2017-09-27 13:08 PDT by Ryan Haddad
Modified: 2018-01-03 14:24 PST (History)
9 users (show)

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Description Ryan Haddad 2017-09-27 13:08:22 PDT 
LayoutTest http/tests/xmlhttprequest/response-empty-arraybuffer.html is failing

https://build.webkit.org/results/Apple%20High%20Sierra%20Debug%20WK1%20(Tests)/r222557%20(18)/results.html

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Ftests%2Fxmlhttprequest%2Fresponse-empty-arraybuffer.html

--- /Volumes/Data/slave/highsierra-debug-tests-wk1/build/layout-test-results/http/tests/xmlhttprequest/response-empty-arraybuffer-expected.txt
+++ /Volumes/Data/slave/highsierra-debug-tests-wk1/build/layout-test-results/http/tests/xmlhttprequest/response-empty-arraybuffer-actual.txt
@@ -8,9 +8,9 @@
 PASS Object.prototype.toString.call(request.response) is '[object ArrayBuffer]'
 PASS request.response.byteLength is 0
 Test that XMLHttpRequest.response returns an empty ArrayBuffer when received status is '304 not modified'.
-PASS request.status is 200
+FAIL request.status should be 200. Was 206.
 PASS Object.prototype.toString.call(request.response) is '[object ArrayBuffer]'
-PASS request.response.byteLength is 68
+FAIL request.response.byteLength should be 68. Was 3.
 PASS request2.status is 304
 PASS Object.prototype.toString.call(request2.response) is '[object ArrayBuffer]'
 PASS request2.response.byteLength is 0
Comment 1 Ryan Haddad 2017-09-27 13:09:47 PDT 
This is seen on High Sierra WK1 bots.
Comment 2 Alexey Proskuryakov 2017-09-28 09:47:48 PDT 
Apache doesn't actually return 206 code during this test. So it must be coming from WebKit cache, which seems like a serious WebKit bug (we should check Range header field in request when pulling from cache).

127.0.0.1 - - [27/Sep/2017:11:20:51 -0700] "GET /xmlhttprequest/response-empty-arraybuffer.html HTTP/1.1" 200 2366 570
127.0.0.1 - - [27/Sep/2017:11:20:51 -0700] "GET /xmlhttprequest/resources/zero-length.xml HTTP/1.1" 200 - 508
127.0.0.1 - - [27/Sep/2017:11:20:51 -0700] "GET /xmlhttprequest/resources/reply.xml HTTP/1.1" 304 - 426

Should try reproducing this by running the test after ones that do use range requests  with this resource (xmlhttprequest/cache-override.html, xmlhttprequest/range-test.html).
Comment 3 Radar WebKit Bug Importer 2017-09-28 09:48:20 PDT 
<rdar://problem/34716163>
Comment 4 Alexey Proskuryakov 2017-09-28 09:54:26 PDT 
> seems like a serious WebKit bug

If this is truly WebKit1 only, it may be below WebKit in fact.
Comment 5 Antti Koivisto 2017-09-29 10:24:43 PDT 
WebKit cache is not used for WK1. If it is cache related it is an NSURLCache bug.
Comment 6 Alexey Proskuryakov 2018-01-03 14:24:49 PST 
Confirmed that this is truly WebKit1 only, will keep tracking in Radar.