It seems r225844: <https://trac.webkit.org/changeset/225844> cased like ~850 new JSC test failures on 32-bit: i686: Results for r225843 ( 74 JSC test failed) https://build.webkit.org/builders/GTK%20Linux%2032-bit%20Release/builds/5267 Results for r225844 (904 JSC test failed) https://build.webkit.org/builders/GTK%20Linux%2032-bit%20Release/builds/5268 armv7t2: Results for r225843 ( 30 JSC test failed) https://build.webkit.org/builders/JSCOnly%20Linux%20ARMv7%20Thumb2%20Release/builds/2791 Results for r225846 (880 JSC test failed) https://build.webkit.org/builders/JSCOnly%20Linux%20ARMv7%20Thumb2%20Release/builds/2793
about to land a fix.
landed in: https://trac.webkit.org/changeset/225865/webkit
<rdar://problem/36028948>