Copying and pasting long strings into command line fails

[roa-nyx]

Issue Type: Bug

Not sure if maybe this is unsupported? I feel there is good support for the Terminal in general including copy and paste support.

However today I noticed that some of my strings refused to copy into the terminal and the only difference I can find is that these strings are longer then the ones that work.

The string in question is of length 1587 and fails to paste (right-click, ctrl+v, double right-click > paste... all do nothing, terminal behaves as if no action taken).

So I set about testing this real quick.

The following is a list of lengths I tried and whether the paste action worked in the terminal. Each of the strings are constructed of "1234567890" repeated/truncated however many times are necessary.

100: Paste worked
500: Paste worked
1000: Paste worked
2000: Paste does not work
1500: Paste worked
1750: Paste does not work
1580: Paste does not work
1550: Paste worked
1570: Paste does not work
1560: Paste worked
1565: Paste worked
1568: Paste worked
1569: Paste does not work

It seem like if the length of the string is 1569 characters long or longer it fails to paste. I also tried to copy a string of length 1569 to notepad first and then to the terminal from there (to strip out any strangeness/alternative data-types, etc).

This happens with extensions disabled as well.

VS Code version: Code 1.29.1 (bc24f98, 2018-11-15T19:13:36.375Z)
OS version: Windows_NT x64 6.1.7601

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz (4 x 2808)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: enabled video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Memory (System)	31.63GB (18.27GB free)
Process Argv	C:_projs\OverKlock\CM
Screen Reader	no
VM	0%

Extensions (4)

Extension	Author (truncated)	Version
calculate	aca	2.1.0
vscode-diff	fab	1.3.6
code-beautifier	mic	2.1.0
csharp	ms-	1.17.1

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• paste file from other folder (#58939)
• Line Paste between Files bug (#43012)
• Copy Paste Not Working (#55303)

[roa-nyx]

Also, minor additional mention: All of these strings appear to work in the regular windows command line outside of VS Code.

Please let me know if I can provide any additional details to get this resolved.

[Tyriar]

Looks like the same root cause as #38137