Clarification was requested:

1. Load blend
2. Add mirror modifier to the active object

As I posted in https://developer.blender.org/T87233
It's produced in a scene with geometry and no light source at all.

If we can flag modifiers as targets/dependencies of drivers, that could allow at least a workable solution.

• Versioning fix. Filter order consistency...

• Removed the now-used UNUSED enum from versioning_280.c

• Changed to use an UNUSED enum

• Corrected the actual non-flipped logic exclude_filter test

Flipped logic to Selectable

Campbell,
It wasn't specifically that, no; however, I examined the GSUB tables in DejaVuSans (at least the single-substitution tables), and there is no substitution being made [that I can see]. This does seem to imply that these other softwares *are* actually substituting missing glyphs from other fonts.

Displays for me with DejaVuSans as well (in Linux).
Investigating DejaVuSans more I found this block of arrows shows the (or a) problem though: Sparse success of glyphs in Blender.
The screencapture at the bottom of this post shows them rendered with DejaVuSans.ttf in my web browser (css directly referencing the local file). Then the same local file used on the object in blender with many failed glyphs.
(.blend attached too)
🠹🡄🡆🠼🠾🡀🡂🠐🠒🠔🠖🠘🠚🠜🠞⭠⭢⭤⭥⭦⭧🠀🠂
🠄🠆🠈🠊🠠🠢🠤🠦🠨🠪🠬🠮🠰🠲🡠🡢🡨🡪🡰🡲🡸🡺🢀🢂
⮈⮊➲⮜⮞⮘⮚➢➣⭪⭬⇠⇢⤌⤍⬸⤑⬷⤐↼⇀⥊⥋⥎⥐
⥒⥓⥚⥛⥢⥤⇋⇌⥦⥨⥪⥬⥮⥯⮄⮆⇈⇊⇆⇄⮀⮂⭾⭿
⇐⇒⇔⇕⇖⇗⇍⇏⟸⟹⤂⤃⤆⤇⬱⇶⇚⇛⭅⭆⭰⭲⭶⭷
⇤⇥⤝⤞↤↦⬶⤅⟻⟼↸⇱⇲⇜⇝⬳⟿↜↝⬿⤳⇷⇸⇺⇻
⭺⭼⬴⤀⬵⤁⬹⤔⬻⤖⮠⮡↰↱⮐⮑⮒⮓↩↪⤣⤤⭚⭛↫↬⤙⤚
⥼⥽⭜⭝⭞⭟↯⭍↶↷⤺⤻⭯⭮⟲⟳⥀⥁🗘⮎⮌⮔🔁⤶⤷⮰⮱
➥➦⮨⮩➩➪🢠🢡⇪⮸➳➵➙➘➾⇰➛➜➺➻◄►◀▶⯇⯈🢐🢒
⌃⌄🢔🢖🢜🢝⮹↞↠⯬⯭isc🠴🠶🢘🢚🔙↢↣⇽⇾⭎⭏⥂⥃⥉⥰
⤼⤽⥶⥸⥷⭃⭀⥱⭂⭈⭁⭇⭋⭌⥆⥅⬰⇴⬲⟴⬾⥇⥹⥻⥺⭄⤪⤨

I can't get to that right now, but this is what I used in the above.
(I know Ton mentioned the rule of requiring the .blend)
For now this is the best I can do: The text in the last Windows sample is here:
U+220x ∀ ∁ ∂ ∃ ∄ ∅ ∆ ∇ ∈ ∉ ∊ ∋ ∌ ∍ ∎ ∏
U+221x ∐ ∑ − ∓ ∔ ∕ ∖ ∗ ∘ ∙ √ ∛ ∜ ∝ ∞ ∟
U+222x ∠ ∡ ∢ ∣ ∤ ∥ ∦ ∧ ∨ ∩ ∪ ∫ ∬ ∭ ∮ ∯
U+223x ∰ ∱ ∲ ∳ ∴ ∵ ∶ ∷ ∸ ∹ ∺ ∻ ∼ ∽ ∾ ∿
U+224x ≀ ≁ ≂ ≃ ≄ ≅ ≆ ≇ ≈ ≉ ≊ ≋ ≌ ≍ ≎ ≏
U+225x ≐ ≑ ≒ ≓ ≔ ≕ ≖ ≗ ≘ ≙ ≚ ≛ ≜ ≝ ≞ ≟
U+226x ≠ ≡ ≢ ≣ ≤ ≥ ≦ ≧ ≨ ≩ ≪ ≫ ≬ ≭ ≮ ≯
U+227x ≰ ≱ ≲ ≳ ≴ ≵ ≶ ≷ ≸ ≹ ≺ ≻ ≼ ≽ ≾ ≿
U+228x ⊀ ⊁ ⊂ ⊃ ⊄ ⊅ ⊆ ⊇ ⊈ ⊉ ⊊ ⊋ ⊌ ⊍ ⊎ ⊏
U+229x ⊐ ⊑ ⊒ ⊓ ⊔ ⊕ ⊖ ⊗ ⊘ ⊙ ⊚ ⊛ ⊜ ⊝ ⊞ ⊟
U+22Ax ⊠ ⊡ ⊢ ⊣ ⊤ ⊥ ⊦ ⊧ ⊨ ⊩ ⊪ ⊫ ⊬ ⊭ ⊮ ⊯
U+22Bx ⊰ ⊱ ⊲ ⊳ ⊴ ⊵ ⊶ ⊷ ⊸ ⊹ ⊺ ⊻ ⊼ ⊽ ⊾ ⊿
U+22Cx ⋀ ⋁ ⋂ ⋃ ⋄ ⋅ ⋆ ⋇ ⋈ ⋉ ⋊ ⋋ ⋌ ⋍ ⋎ ⋏
U+22Dx ⋐ ⋑ ⋒ ⋓ ⋔ ⋕ ⋖ ⋗ ⋘ ⋙ ⋚ ⋛ ⋜ ⋝ ⋞ ⋟
U+22Ex ⋠ ⋡ ⋢ ⋣ ⋤ ⋥ ⋦ ⋧ ⋨ ⋩ ⋪ ⋫ ⋬ ⋭ ⋮ ⋯
U+22Fx ⋰ ⋱ ⋲ ⋳ ⋴ ⋵ ⋶ ⋷ ⋸ ⋹ ⋺ ⋻ ⋼ ⋽ ⋾ ⋿

There are potential errors with the pre-built libs if depending on GCC 9.x, but I don't see a resolution to know if this is 100% the cause.
See: https://devtalk.blender.org/t/blender-2-90-local-build-fails/14393/4

Here's a video (and .blend) without the water in the cup, demonstrating a flickering inconsistency as well.
(On a separate note, I've not yet looked into why eevee, when its working, doesn't refract the procedural bg object texture behind it. No IoR setting affects the texture itself, although you can see it does get affected when changed to a view looking towards the edge... unless it flickers opaque/non-transparent.)

The interesting issue is that the object is in the same place and works fine, until it's parented -- there should be no difference in z-fighting. Furthermore, once the flickering is triggered by the parenting process, it does not go away even after being unparented.
(Note that there is no object movement).

Confirmed with v2.83.0, Linux w/ amd rx580

SO_FILTER_OB_STATE_UNSELECTABLE = (1 << 17), /* Not set via DNA. */
How do I resolve this? Add it to the end, as 18 (instead of 17), and keep SO_FILTER_ID_TYPE shifted up one still?

Rebased branch to current master

Ctrl <-> Caps flipping was really worth it.
Seems fine in 2.8+. Resolving.

I submitted a patch that adds an option:
"Keyboard Selections Activates Tracks (needed for Tweak Mode)":
https://developer.blender.org/D5639

I didn't want to change the existing functionality, which can be useful at times.
For example, you slide a bunch of strips around in the NLA, but have some others that were mouse-selected previously (and therefore their tracks are active), so you can tab into tweak mode to adjust only their curves without seeing *all* the selected strips curves, and without changing your selection again (to limit it to just those you wanted to tweak).

Primarily fixed inconsistency in mouse selection.

Found some bugs that showed up today but I swear weren't there yesterday. :) Working on it.

Select-all (a) also doesn't select for tabbing into action editing. There should probably either be a way to do this, or possibly something in the RMB menu or Select menu for converting the selection to the tab'able strips.

Was this done, and only needed review?
Khaled, Mazoon, what happened with this thing?

Pardon me, I have to correct something. bfont does NOT have the Arabic glyphs.
Once a font is loaded, can Python access its glyph data, so if they're outright missing (without placeholder glyphs) an addon script can warn?

Just an FYI:
harfbuzz is the most common library for handling font shaping, used in "Android, Chrome, ChromeOS, Firefox, GNOME, GTK+, KDE, LibreOffice, OpenJDK, PlayStation, Qt, XeTeX, and other places."
Their manual "what-is-harfbuzz.html" states, "HarfBuzz can properly shape all of the world's major writing systems."
https://harfbuzz.github.io/getting-started.html

Oh, please note that I also keyed the Offset on the Empties (and set Fixed Position).

I had these empty keymap errors (no intflag error though), and fixed it.
In a fresh git build, I forgot to run 'make install' after 'make' in my build dir.
(What gave the clue was some .py errors in terminal when quitting, making me realize I might have mismatched file versions.)

Build from today (2019-01-28). Freestyle seems to show some other issue going on. The mirrored copy of beveled curves (full fill mode) do not receive freestyle lines:

Updating blender2.8 -> master in my local repo, and rebuilding, showed the problem is resolved. :)

In 2.80 (git built within the week (168a6a4bfc1)).
Linux (Debian stable).
Official Nvidia drivers. Geforce 970. Driver Version: 390.48

Are these assignable in the Prefs -> Input? I can't find them.

Not reproduced in Win10, 2.78a, with a GeForce GTX 560 Ti.

Indeed, but there seems to be some issue with the user count not dropping to 0 when a slot is removed.

Thanks Tamito,

It appears having 14 children is an issue. When changing it down to 1 it doesn't bog down. 3.4ghz cpu too.

I did not notice the instructions not to post feature requests here. My apologies. Please feel free to close this or, better yet, do me the favor of placing it somewhere appropriate. Somewhere where the Sun shines.

Click and drag of nodes also breaks with Enhanced 3d Cursor enabled

More details:
Blender must be started with the addon already enabled for tooltips to fail.
Then, toggling it off will re-enable tooltips.