LLM repeated code snippet endlessly in answer

[ascripter]

Type: Bug

Using Grok Code Fast 1 to debug pytest issue. It suggested 10 lines of code, but repeated them until the output exceeded the limit.

Extension version: 0.36.1
VS Code version: Code 1.108.1 (585eba7, 2026-01-14T14:55:44.241Z)
OS version: Windows_NT x64 10.0.19045
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz (8 x 2904)
GPU Status	2d_canvas: enabled 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 trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	15.82GB (2.33GB free)
Process Argv	--crash-reporter-id caeccff9-1240-4e0c-8b4e-001368fec28d
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
pythonvspyt551cf:31249601
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31436602
aj953862:31281341
6abeh943:31336334
cloudbuttont:31379625
3efgi100_wstrepl:31403338
use-responses-api:31390855
je187915:31407605
ec5jj548:31422691
cmp-ext-treat:31426748
cp_cls_t_966_ss:31446430
c0683394:31419495
ge8j1254_inline_auto_hint_haiku:31427726
nes-autoexp-10:31446583
a5gib710:31434435
38bie571_auto:31426784
rename_enabled:31436409
7a04d226_do_not_restore_last_panel_session:31438103
anthropic_thinking_t:31432745
h_21abi904:31446851
406hc587_ask_agent:31428393
cp_cls_c_1081:31443829
copilot-nes-callisto-trt:31434412
nowdiget:31442216
ia-no-proxy-models-svc:31448282
nes-slash-models-on:31441832
nes-set-to-on:31441941
a43f0574a:31442826
ts_provider_enabled:31446104
nes-conv-1-3:31447850

[vs-code-engineering]

Unfortunately I think you are hitting a AI quality issue that is not actionable enough for us to track a bug. We would recommend that you try other available models and look at the Tips and tricks for Copilot in VS Code doc page.

We are constantly improving AI quality in every release, thank you for the feedback! If you believe this is a technical bug, we recommend you report a new issue including logs described on the Copilot Issues wiki page.