[Webkit-unassigned] [Bug 181781] iOS 11.2.2 and 11.2.5b6 WebAssembly regression (error or hang)

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jan 23 22:54:28 PST 2018


https://bugs.webkit.org/show_bug.cgi?id=181781

--- Comment #3 from Brion Vibber <bvibber at wikimedia.org> ---
I've identified a smaller test case which I've posted at https://github.com/brion/min-wasm-fail

Does an i32.store of a value at index 4 and reads it back -- on iOS I get 0 instead of the expected value. (At index 0, we get the expected value back.)

The actual out of bounds exception in emscripten'd code seems to be a side effect of failing to load/store correctly, so pointers get screwed up and something ends up trying to access outside of mem.

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