Minecraft wiki entry for Development_versions, associated text: MC-31681 – Fog and clouds darken when indoors or under trees (<16 Chunk Render Distance).
MC-51150 – Swimming in water, riding a minecart or standing on soul sand and snow layers 8 darkens the sky at day time.
MC-109311 – Woodland mansion failed to generate.
MC-132457 – Advancement and dimension command suggestions require minecraft namespace.
MC-132496 – Passive Mob Spawning Breaks 1.9+.
MC-132762 – Observed signal strength observer abnormality.
MC-134587 – Using F3 + T several times will eventually freeze iMac.
MC-135484 – Pressing Q + right click a block while holding a double block only shows the top of the block.
MC-135878 – Maps delete recently marked banners upon reopening world.