I can reproduce this on Windows with VS Code 1.133.0 Stable and its bundled GitHub Copilot 0.61.0. #331190

Type: Bug

I have attached a redacted diagnostic package containing both failing sessions, the stable no-Copilot comparison, a detailed timeline, and SHA-256 checksums. The local logs do not contain the final native fatal-error line, so I can prove the Copilot activation/stack/crash correlation but cannot independently confirm the precise native mechanism behind exit code 134.

Does this issue occur when all extensions are disabled?: Yes/No

VS Code Version:
OS Version: Windows:
Edition Windows 11 Pro
Version 25H2
Installed on ‎11/‎22/‎2024
OS build 26200.9168

Processor Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz (3.19 GHz)
Installed RAM 16.0 GB (15.8 GB usable)
Graphics card NVIDIA GeForce GTX 750 Ti (2 GB)
Intel(R) UHD Graphics 630 (128 MB)
Storage 252 GB of 932 GB used
Product ID 00330-51592-46385-AAOEM
System type 64-bit operating system, x64-based processor

Experience Windows Feature Experience Pack 1000.26100.344.0

Steps to Reproduce:

I can reproduce this on Windows with VS Code 1.133.0 Stable and its bundled GitHub Copilot 0.61.0.
This has interrupted development for approximately three to four months. Disabling ordinary marketplace extensions does not stop it because the implicated extension is bundled under VS Code's own resources/app/extensions/copilot directory.

Across two captured failing sessions, the VS Code main logs record 17 extension-host exits with code 134. Every replacement host activates GitHub.copilot-chat. The extension-host log repeatedly contains the same stack reported in this issue:

TypeError: e is not iterable
at ...setItems (.../resources/app/extensions/copilot/dist/extension.js:1074:19961)
at ..._computeFn (.../resources/app/extensions/copilot/dist/extension.js:1074:19700)
at ..._recompute (.../resources/app/extensions/copilot/dist/extension.js:1074:11919)
at ...recomputeInitiallyAndOnChange (.../resources/app/extensions/copilot/dist/extension.js:1074:1092)
at NI.init (.../resources/app/extensions/copilot/dist/extension.js:2423:10372)
at Timeout._onTimeout (.../resources/app/extensions/copilot/dist/extension.js:3:12)

The NI.init code in this bundle initializes Copilot's Git repository observer. Copilot also repeatedly logs:

Failed to create database. Falling back to in-memory db: Error: unable to open database file

I performed a direct A/B comparison on the same installation and workspace:

Normal launch with bundled Copilot active: repeated code-134 extension-host aborts.
Launch with --disable-extension GitHub.copilot --disable-extension GitHub.copilot-chat: Copilot does not activate, while the built-in Git, GitHub authentication, JSON, TypeScript, and other built-in extensions continue running normally. No extension-host exit appears in the captured comparison session.
Restarting Windows only suppresses the problem temporarily, usually for one or two days. The explicit Copilot disable flags are the only reliable workaround found so far, but a VS Code update or normal relaunch can bring the issue back.

Environment:

VS Code: 1.133.0 Stable
VS Code commit: a5b5009
Bundled GitHub Copilot: 0.61.0
Copilot bundle commit metadata: 94c8e2a
OS: Windows x64

I have a redacted diagnostic package containing both failing sessions, the stable no-Copilot comparison, a detailed timeline, and SHA-256 checksums. The local logs do not contain the final native fatal-error line, so I can prove the Copilot activation/stack/crash correlation but cannot independently confirm the precise native mechanism behind exit code 134.
2.

VS Code version: Code 1.133.0 (a5b500951314efd502d07465bd138dfbd714a960, 2026-08-11T22:14:08Z)
OS version: Windows_NT x64 10.0.26200
Modes:

System Info

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz (12 x 3192)|
|GPU Status|2d_canvas: enabled
GPU0: VENDOR= 0x10de, DEVICE=0x1380 [NVIDIA GeForce GTX 750 Ti], DRIVER_VENDOR=NVIDIA, DRIVER_VERSION=32.0.15.8253 *ACTIVE*
GPU1: VENDOR= 0x8086, DEVICE=0x3e92 [Intel(R) UHD Graphics 630], DRIVER_VERSION=27.20.100.9664
GPU2: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.8972
Machine model name:
Machine model version:
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
webgpu: enabled
webnn: disabled_off|
|Load (avg)|undefined|
|Memory (System)|15.83GB (2.97GB free)|
|Process Argv|--disable-extension GitHub.copilot --disable-extension GitHub.copilot-chat --crash-reporter-id bd80dbbc-3329-4dc1-abcc-8143db345310|
|Screen Reader|yes|
|VM|0%|
Extensions disabled
A/B Experiments

```
vsliv368cf:30146710
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
envsactivate1:31551504
cloudbuttont:31379625
3efgi100_wstrepl:31403338
55ia6109:31457054
ec5jj548:31422691
cp_cls_t_966_ss:31526232
4je02754:31466945
c3h7c220:31478652
ge8j1254_inline_auto_hint_haiku:31490510
cp_cls_c_1081:31454833
conptydll_true:31498968
e9c30283:31461165
test_treatment2:31471001
c9b86496:31447327
ei9d7968:31496641
chat:31457767
ghj88844:31499326
ddid_c:31478207
hmra_i5g22:31518061
7df3h592:31512476
cp_cls_t_1082:31535311
logging_enabled_new:31498466
j0d79568:31499440
jb_cp_cls_t_632:31543129
56dj4588:31512888
32d76977:31512328
ha629193:31508444
cdk-lw-on:31524445
a1ije391_t:31540920
jbcp_cls_pctr_t:31531130
61138546:31518536
cp_intellij_t_nes:31548657
jf4hg949:31526829
ahp-both-windows:31556933
session_8:31532895
chatquotatrajectorynudge-enabled:31548767
ihg5j128:31534457
f412h606:31551416
7g2b5551:31542111
enable_editor_pane_layout:31567814
allow-none:31555437
fd5dc207:31551400
36h42362:31564511
c7c27ce7:31554789
1h923230:31564177
1532g621_copy:31554320
treatment-23-1:31555779
unuse_dynamic_mcp:31555281
0d8dfbc3:31566037
switchtoauto:31559321
maidictation:31565333
0c1h4866:31566224
vrbsty_fls:31561059
session-archive:31558132
18bic794_t_pref:31563076
5b8j3302:31564601

```