Additional text before the first output line from a Python program in terminal

[yoonghm]

Type: Bug

Create a simple Python program such as:

print("Hello world")
print("Hello VS Code")

Run the program without debugging, the output in VS Code terminal shows

PS D:\MyLesson\Python\FastAPI>  & 'd:\Python\python.exe' 'c:\Users\yhm2\.vscode\extensions\ms-python.debugpy-2024.6.0-win32-x64\bundled\libs\debugpy\adapter/../..\debugpy\launcher' '60780' '--' 'D:\MyLesson\Python\FastAPI\Untitled-1.py'
ed-1.py' ;10a19654-794a-48aa-be32-0db7cf9c4792Hello world
Hello VS Code
PS D:\MyLesson\Python\FastAPI> 

What is ";10a19654-794a-48aa-be32-0db7cf9c4792"?

However, if I close and reopen the same code, and run the the program again without debugging, the problem goes away.

VS Code version: Code 1.90.1 (611f9bf, 2024-06-11T21:01:24.262Z)
OS version: Windows_NT x64 10.0.19045
Modes:

System Info

Item	Value
CPUs	12th Gen Intel(R) Core(TM) i7-1260P (8 x 2496)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled
Load (avg)	undefined
Memory (System)	31.71GB (19.18GB free)
Process Argv	--crash-reporter-id 2885691e-ec86-4c8c-a361-9fce5d8ea86a
Screen Reader	no
VM	0%

Extensions (8)

Extension	Author (truncated)	Version
Bookmarks	ale	13.5.0
debugpy	ms-	2024.6.0
python	ms-	2024.8.1
vscode-pylance	ms-	2024.6.1
typst-lsp	nva	0.13.0
rust-analyzer	rus	0.3.1995
pdf	tom	1.2.2
vscode-lldb	vad	1.10.0

A/B Experiments

vsliv368:30146709
vspor879:30202332
vspor708:30202333
vspor363:30204092
vscoreces:30445986
vscod805:30301674
binariesv615:30325510
vsaa593cf:30376535
py29gd2263:31024239
c4g48928:30535728
azure-dev_surveyone:30548225
a9j8j154:30646983
962ge761:30959799
pythongtdpath:30769146
welcomedialogc:30910334
pythonidxpt:30866567
pythonnoceb:30805159
asynctok:30898717
pythontestfixt:30902429
pythonregdiag2:30936856
pythonmypyd1:30879173
2e7ec940:31000449
pythontbext0:30879054
accentitlementsc:30995553
dsvsc016:30899300
dsvsc017:30899301
dsvsc018:30899302
cppperfnew:31000557
dsvsc020:30976470
pythonait:31006305
jchc7451:31067544
chatpanelt:31048053
dsvsc021:30996838
da93g388:31013173
pythoncenvpt:31062603
a69g1124:31058053
dvdeprecation:31068756
pythonprt:31056678
dwnewjupytercf:31046870

[karthiknadig]

This looks like issue with shell integration. /cc @Tyriar