[Regression] Cannot read properties of undefined (reading 'then') — terminalProcessManager.setDimensions

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#317,573 opened on May 20, 2026 2 comments 0 reactions 1 assignee View on GitHub

@bryanchen-d is already working on this.

Since May 20, 2026.

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This issue has not been assessed yet.

Description

ai-analyzed ai-generated bug error-telemetry recent-regression

Error Message

unhandlederror-Cannot read properties of undefined (reading 'then')

Stack Trace

    at b2e.setDimensions (./src/vs/workbench/contrib/terminal/browser/terminalProcessManager.ts:608:0)
    at Ov._updatePtyDimensions (./src/vs/workbench/contrib/terminal/browser/terminalInstance.ts:2073:0)
    at bpt._resizeBothCallback (./src/vs/workbench/contrib/terminal/browser/terminalInstance.ts:823:0)
    at bpt.resize (./src/vs/workbench/contrib/terminal/browser/terminalResizeDebouncer.ts:46:8)
    at Ov._resize (./src/vs/workbench/contrib/terminal/browser/terminalInstance.ts:2062:0)
    at Ov.setVisible (./src/vs/workbench/contrib/terminal/browser/terminalInstance.ts:1428:0)
    at Qye.value (./src/vs/workbench/contrib/terminal/browser/terminalInstance.ts:591:0)
    at T._deliver (./src/vs/base/common/event.ts:1364:12)
    at T._deliverQueue (./src/vs/base/common/event.ts:1375:8)
    at T.fire (./src/vs/base/common/event.ts:1399:8)
    at JJt.triggerConfigurationChange (./src/vs/workbench/services/configuration/browser/configurationService.ts:1124:0)
    at JJt.onDefaultConfigurationChanged (./src/vs/workbench/services/configuration/browser/configurationService.ts:773:0)
    at Qye.value (./src/vs/workbench/services/configuration/browser/configurationService.ts:156:0)
    at T._deliver (./src/vs/base/common/event.ts:1364:12)
    at T._deliverQueue (./src/vs/base/common/event.ts:1375:8)
    at T.fire (./src/vs/base/common/event.ts:1399:8)
    at a.onDidUpdateConfiguration (./src/vs/platform/configuration/common/configurations.ts:49:33)
    at a.onDidUpdateConfiguration (./src/vs/workbench/services/configuration/browser/configuration.ts:92:8)
    at Qye.value (./src/vs/platform/configuration/common/configurations.ts:38:148)
    at T._deliver (./src/vs/base/common/event.ts:1364:12)

Raw Stack Trace (minified)

TypeError: Cannot read properties of undefined (reading 'then')     at b2e.setDimensions (out/vs/workbench/workbench.desktop.main.js:4026:590)     at Ov._updatePtyDimensions (out/vs/workbench/workbench.desktop.main.js:4030:3437)     at bpt._resizeBothCallback (out/vs/workbench/workbench.desktop.main.js:4026:33479)     at bpt.resize (out/vs/workbench/workbench.desktop.main.js:4026:14619)     at Ov._resize (out/vs/workbench/workbench.desktop.main.js:4030:3214)     at Ov.setVisible (out/vs/workbench/workbench.desktop.main.js:4029:7142)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:4026:25112)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T._deliverQueue (out/vs/workbench/workbench.desktop.main.js:405:3358)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3693)     at JJt.triggerConfigurationChange (out/vs/workbench/workbench.desktop.main.js:4955:61813)     at JJt.onDefaultConfigurationChanged (out/vs/workbench/workbench.desktop.main.js:4955:52606)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:4955:39341)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T._deliverQueue (out/vs/workbench/workbench.desktop.main.js:405:3358)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3693)     at a.onDidUpdateConfiguration (out/vs/workbench/workbench.desktop.main.js:4954:2736)     at a.onDidUpdateConfiguration (out/vs/workbench/workbench.desktop.main.js:4955:14378)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:4954:2450)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T._deliverQueue (out/vs/workbench/workbench.desktop.main.js:405:3358)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3693)     at Zni.updateConfigurations (out/vs/workbench/workbench.desktop.main.js:434:74224)     at syi (out/vs/workbench/workbench.desktop.main.js:1028:1465)     at fIe._updateConfiguration (out/vs/workbench/workbench.desktop.main.js:4135:15478)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:4135:14964)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3588)     at nii._fn (out/vs/workbench/workbench.desktop.main.js:1043:34691)     at nii.dispose (out/vs/workbench/workbench.desktop.main.js:403:1320)     at je (out/vs/workbench/workbench.desktop.main.js:403:747)     at vy.clear (out/vs/workbench/workbench.desktop.main.js:403:1636)     at vy.dispose (out/vs/workbench/workbench.desktop.main.js:403:1546)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:4026:26694)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T._deliverQueue (out/vs/workbench/workbench.desktop.main.js:405:3358)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3693)     at Ov.dispose (out/vs/workbench/workbench.desktop.main.js:4029:5533)     at Ov._onProcessExit (out/vs/workbench/workbench.desktop.main.js:4029:13868)

Details

Property	Value
Bucket ID	`939be0b4-8905-1641-2ad1-79e35d817c95`
Version	1.121.0-insider
Commit	`e9f40e53`
Last Seen	Tue May 19 2026 23:52:54 GMT+0000 (Coordinated Universal Time)
Platforms	Mac, Windows, Linux
Product	VSCode

This issue was automatically created from the VS Code Errors Dashboard

Dominant language: TypeScript
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