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Crash: Chunk Selection over ubuntu prompt working directory #4772

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opened 2026-01-30 23:56:11 +00:00 by claunia · 0 comments
claunia commented 2026-01-30 23:56:11 +00:00
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Originally created by @carlos-zamora on GitHub (Nov 1, 2019).

Originally assigned to: @carlos-zamora on GitHub.

Environment

Windows build number: [run `[Environment]::10.0.19016.1000
Windows Terminal version (if applicable): v0.6.2951.0

Other prereqs:

  • double click delimiters must include "\/"
  • have a way of printing CJK characters and emoji
  • Ubuntu
  • must be "Windows Terminal (Dev Build)". Doesn't repro on version downloaded from the store. Doesn't matter if debugger is attached.

NOTE: not entirely sure which of these are relevant but we can cut down on it as we investigate

Steps to reproduce

  1. open tab with ubuntu in it
  2. output CJK characters
  3. double click a portion of the command that is in English
  4. chunk select (drag while holding mouse button) to the right or down (should work fine. Even if you highlight CJK characters)
  5. chunk select back past starting anchor into file path

(Optional) if it doesn't crash when you go into the file path, just keep trying to chunk select the file path, it should occur.

Expected behavior

Chunk selection continues to happen just fine.

Actual behavior

Crash. Here's the stack:

>	ucrtbased.dll!_VCrtDbgReportA(int nRptType, void * returnAddress, const char * szFile, int nLine, const char * szModule, const char * szFormat, char * arglist) Line 284	C++
 	ucrtbased.dll!_CrtDbgReport(int report_type, const char * file_name, int line_number, const char * module_name, const char * format, ...) Line 263	C++
 	TerminalControl.dll!std::_Vector_const_iterator<std::_Vector_val<std::_Simple_types<TextAttributeRun> > >::operator--() Line 82	C++
 	TerminalControl.dll!AttrRowIterator::_decrement(unsigned __int64 count) Line 135	C++
 	TerminalControl.dll!AttrRowIterator::operator+=(const __int64 & movement) Line 64	C++
 	TerminalControl.dll!TextBufferCellIterator::_SetPos(const _COORD newPos) Line 219	C++
 	TerminalControl.dll!TextBufferCellIterator::operator+=(const __int64 & movement) Line 110	C++
 	TerminalControl.dll!TextBufferCellIterator::operator-=(const __int64 & movement) Line 122	C++
 	TerminalControl.dll!TextBufferCellIterator::operator--() Line 140	C++
 	TerminalControl.dll!TextBufferCellIterator::operator--(int __formal) Line 161	C++
 	TerminalControl.dll!Microsoft::Terminal::Core::Terminal::_ExpandDoubleClickSelectionLeft(const _COORD position) Line 369	C++

I'm particularly confused because it's hitting a _CrtDbgBreak() in the last frame.

Originally created by @carlos-zamora on GitHub (Nov 1, 2019). Originally assigned to: @carlos-zamora on GitHub. # Environment ```none Windows build number: [run `[Environment]::10.0.19016.1000 Windows Terminal version (if applicable): v0.6.2951.0 ``` Other prereqs: - double click delimiters must include "\\/" - have a way of printing CJK characters and emoji - Ubuntu - must be "Windows Terminal (Dev Build)". Doesn't repro on version downloaded from the store. Doesn't matter if debugger is attached. NOTE: not entirely sure which of these are relevant but we can cut down on it as we investigate # Steps to reproduce 1. open tab with ubuntu in it 2. output CJK characters 3. double click a portion of the command that is in English 4. chunk select (drag while holding mouse button) to the right or down (should work fine. Even if you highlight CJK characters) 5. chunk select back past starting anchor into file path (Optional) if it doesn't crash when you go into the file path, just keep trying to chunk select the file path, it should occur. # Expected behavior Chunk selection continues to happen just fine. # Actual behavior Crash. Here's the stack: ``` > ucrtbased.dll!_VCrtDbgReportA(int nRptType, void * returnAddress, const char * szFile, int nLine, const char * szModule, const char * szFormat, char * arglist) Line 284 C++ ucrtbased.dll!_CrtDbgReport(int report_type, const char * file_name, int line_number, const char * module_name, const char * format, ...) Line 263 C++ TerminalControl.dll!std::_Vector_const_iterator<std::_Vector_val<std::_Simple_types<TextAttributeRun> > >::operator--() Line 82 C++ TerminalControl.dll!AttrRowIterator::_decrement(unsigned __int64 count) Line 135 C++ TerminalControl.dll!AttrRowIterator::operator+=(const __int64 & movement) Line 64 C++ TerminalControl.dll!TextBufferCellIterator::_SetPos(const _COORD newPos) Line 219 C++ TerminalControl.dll!TextBufferCellIterator::operator+=(const __int64 & movement) Line 110 C++ TerminalControl.dll!TextBufferCellIterator::operator-=(const __int64 & movement) Line 122 C++ TerminalControl.dll!TextBufferCellIterator::operator--() Line 140 C++ TerminalControl.dll!TextBufferCellIterator::operator--(int __formal) Line 161 C++ TerminalControl.dll!Microsoft::Terminal::Core::Terminal::_ExpandDoubleClickSelectionLeft(const _COORD position) Line 369 C++ ``` I'm particularly confused because it's hitting a `_CrtDbgBreak()` in the last frame.
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Reference: starred/terminal#4772
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