I'm assuming it's linux specific because it's affecting both GTK and WPE https://build.webkit.org/builders/WPE%20Linux%2064-bit%20Release%20%28Tests%29/builds/4649/steps/jscore-test https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/4441/steps/jscore-test
Reproduced in JSCOnly port.
Also on mac: https://build.webkit.org/builders/Apple%20El%20Capitan%20Release%20JSC%20%28Tests%29/builds/5747 I suspect this warrants a rollout.
Created attachment 327963 [details] Patch
Comment on attachment 327963 [details] Patch Thanks! r=me the change looks simple enough and bots are very broken.
Committed r225322: <https://trac.webkit.org/changeset/225322>
<rdar://problem/35769970>