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views 7.x-3.x gives errors doing an array to string conversion with php 5.4:
in fact, any other module attempting to call array_diff_assoc() on multidimensional arrays will have the same problem. an appropriate solution would be to add a function called array_diff_assoc_recursive() based on comment #12 on that issue for use in views and anywhere else it's needed.
since drupal 7 is supposed to support php 5.4, this will likely need to be backported once accepted into drupal 8.
i wasn't immediately able to find an equivalent function in any library already bundled in drupal 8. my apologies if i've missed it and this is already there.
PASSED: [[SimpleTest]]: [MySQL] 40,364 pass(es). View
PASSED: [[SimpleTest]]: [MySQL] 40,417 pass(es). View
FAILED: [[SimpleTest]]: [MySQL] 40,375 pass(es), 1 fail(s), and 0 exception(s). View
FAILED: [[SimpleTest]]: [MySQL] 53,111 pass(es), 0 fail(s), and 2 exception(s). View
PASSED: [[SimpleTest]]: [MySQL] 53,381 pass(es). View