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[0x7FFFBB83E044] ANOMALY: use of REX.w is meaningless (default operand size is 64) #8873

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opened 2026-01-31 01:40:11 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 01:40:11 +00:00
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Originally created by @Cppowboy on GitHub (Jun 7, 2020).

Environment

win10 professional, 19041.264
for powershell and ubuntu wsl
windows terminal version 1.0.1401.0
no other softwares

Steps to reproduce

Just open windows terminal, and an error message appears on the top of the terminal.
[0x7FFFBB83E044] ANOMALY: use of REX.w is meaningless (default operand size is 64)
This problem only happens when using powershell and ubuntu wsl.

Expected behavior

The terminal should not show this error message.

Actual behavior

An error message appears on the top of the terminal when you start a new terminal tab(powershell or ubuntu wsl).

Originally created by @Cppowboy on GitHub (Jun 7, 2020). <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. If this is an application crash, please also provide a Feedback Hub submission link so we can find your diagnostic data on the backend. Use the category "Apps > Windows Terminal (Preview)" and choose "Share My Feedback" after submission to get the link. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment ```none win10 professional, 19041.264 for powershell and ubuntu wsl windows terminal version 1.0.1401.0 no other softwares ``` # Steps to reproduce <!-- A description of how to trigger this bug. --> Just open windows terminal, and an error message appears on the top of the terminal. [0x7FFFBB83E044] ANOMALY: use of REX.w is meaningless (default operand size is 64) This problem only happens when using powershell and ubuntu wsl. # Expected behavior <!-- A description of what you're expecting, possibly containing screenshots or reference material. --> The terminal should not show this error message. # Actual behavior <!-- What's actually happening? --> An error message appears on the top of the terminal when you start a new terminal tab(powershell or ubuntu wsl).
claunia added the Needs-TriageNeeds-Tag-FixNeeds-Attention labels 2026-01-31 01:40:11 +00:00
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Reference: starred/terminal#8873
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