IRB issue on ARM64: left and right arrows cover up text

[mohamedhafez]

If I run irb in the arm64 environment described below, lets say I type in a line of string like below:

, but then i decide I want to change Hello to Hi or something, press the back button several times, it ends up looking like this:

Pressing the forward button prints a different character but otherwise behaves the same:

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Much less important, but still would be nice to fix:

Lets say we type the line, then type ctrl-a to jump to the beginning of the line, then we get this:

And if we then type ctrl-e to go to the end of the line we get this:

If we repeated the above but used fn-shift-left and then fn-shift-right to go to the beginning of the line then the end, then it looks like this:

Lets say we use alt-left to skip over words to the left, we get:

Then lets use alt-right to go forward a couple words from that position:

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It's not actually overwriting any characters in any of these cases, if I press enter it still executes the command normally, but its just super distracting and makes it hard to edit lines you've written.

On the equivalent environment but using an x86_64 instance from AWS, it behaves perfectly normally.

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Environment:

• JRuby version: jruby 9.4.3.0 (3.1.4) 2023-06-07 3086960792 OpenJDK 64-Bit Server VM 17.0.7+7-LTS on 17.0.7+7-LTS +jit [aarch64-linux]

*JRuby installed via rvm 1.29.12 (latest version)

• java --version:

openjdk 17.0.7 2023-04-18 LTS
OpenJDK Runtime Environment Corretto-17.0.7.7.1 (build 17.0.7+7-LTS)
OpenJDK 64-Bit Server VM Corretto-17.0.7.7.1 (build 17.0.7+7-LTS, mixed mode, sharing)

• Operating system and platform: Linux ip-172-30-1-20 5.19.0-1027-aws #28~22.04.1-Ubuntu SMP Wed May 31 18:33:02 UTC 2023 aarch64 aarch64 aarch64 GNU/Linux

[headius]

Sorry there's been no activity on this, but it's a very high priority for me to get back to fixing IRB (and FFI) on aarch64. I run an M1 mac for most of my daily activity and the lack of IRB is very frustrating (it doesn't work at all currently).

Hopefully in the next couple of weeks I can return to this. Any additional information you can provide to dig under the covers would be very helpful.