https://codereview.chromium.org/230363003/diff/1/src/hydrogen.cc
File src/hydrogen.cc (right):

https://codereview.chromium.org/230363003/diff/1/src/hydrogen.cc#newcode5826
src/hydrogen.cc:5826: if (access_type != STORE || !map->is_observed()) {
On 2014/04/09 14:08:16, Toon Verwaest wrote:
So this case will still trigger for observed maps, right?

When it is a load - yes (since loads should not be affected by
observation). When it's a store and the map is observed,
adding the map to the typelist would cause some Object.observe
tests to fail.

https://codereview.chromium.org/230363003/

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