encoding module gets unhandled exception crashing the program

[quaesitor-scientiam]

Describe the bug

Reading large XML files

"S:\Business Projects\vPartsUnlimited\vPartsUnlimited.exe"
Unhandled Exception 0xfcd75fd3f0
 : _NLG_Return2               ?? : address = 0x7ffe50a809a7
 : builtin__vmemcpy           S:\repo\vlang2\vlib\builtin\cfns_wrapper.c.v:36
 : builtin__array_push_many   S:\repo\vlang2\vlib\builtin\array.v:795
 : strings__Builder_write_string  S:\repo\vlang2\vlib\strings\builder.c.v:138
 : encoding__xml__XMLDocument_pretty_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:141
 : encoding__xml__XMLDocument_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:174
SymFromAddr failure: 126 (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)
Unhandled Exception 0xfcd75fd3f0
 : _NLG_Return2               ?? : address = 0x7ffe50a809a7
 : builtin__vmemcpy           S:\repo\vlang2\vlib\builtin\cfns_wrapper.c.v:36
 : builtin__array_push_many   S:\repo\vlang2\vlib\builtin\array.v:795
 : strings__Builder_write_string  S:\repo\vlang2\vlib\strings\builder.c.v:138
 : encoding__xml__XMLDocument_pretty_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:141
 : encoding__xml__XMLDocument_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:174
SymFromAddr failure: 126 (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)
Unhandled Exception 0xfcd75fd3f0
 : _NLG_Return2               ?? : address = 0x7ffe50a809a7
 : builtin__vmemcpy           S:\repo\vlang2\vlib\builtin\cfns_wrapper.c.v:36
 : builtin__array_push_many   S:\repo\vlang2\vlib\builtin\array.v:795
 : strings__Builder_write_string  S:\repo\vlang2\vlib\strings\builder.c.v:138
 : encoding__xml__XMLDocument_pretty_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:141
 : encoding__xml__XMLDocument_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:174
SymFromAddr failure: 126 (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)
Unhandled Exception 0xfcd75fd3f0
 : _NLG_Return2               ?? : address = 0x7ffe50a809a7
 : builtin__vmemcpy           S:\repo\vlang2\vlib\builtin\cfns_wrapper.c.v:36
 : builtin__array_push_many   S:\repo\vlang2\vlib\builtin\array.v:795
 : strings__Builder_write_string  S:\repo\vlang2\vlib\strings\builder.c.v:138
 : encoding__xml__XMLDocument_pretty_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:141
 : encoding__xml__XMLDocument_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:174
SymFromAddr failure: 126 (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)
Unhandled Exception 0xfcd75fd3f0
 : _NLG_Return2               ?? : address = 0x7ffe50a809a7
 : builtin__vmemcpy           S:\repo\vlang2\vlib\builtin\cfns_wrapper.c.v:36
 : builtin__array_push_many   S:\repo\vlang2\vlib\builtin\array.v:795
 : strings__Builder_write_string  S:\repo\vlang2\vlib\strings\builder.c.v:138
 : encoding__xml__XMLDocument_pretty_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:141
 : encoding__xml__XMLDocument_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:174
SymFromAddr failure: 126 (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)
Unhandled Exception 0xfcd75fd3f0
 : _NLG_Return2               ?? : address = 0x7ffe50a809a7
 : builtin__vmemcpy           S:\repo\vlang2\vlib\builtin\cfns_wrapper.c.v:36
 : builtin__array_push_many   S:\repo\vlang2\vlib\builtin\array.v:795
 : strings__Builder_write_string  S:\repo\vlang2\vlib\strings\builder.c.v:138
 : encoding__xml__XMLDocument_pretty_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:141
 : encoding__xml__XMLDocument_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:174
SymFromAddr failure: 126 (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)
Unhandled Exception 0xfcd75fd3f0
 : _NLG_Return2               ?? : address = 0x7ffe50a809a7
 : builtin__vmemcpy           S:\repo\vlang2\vlib\builtin\cfns_wrapper.c.v:36
 : builtin__array_push_many   S:\repo\vlang2\vlib\builtin\array.v:795
 : strings__Builder_write_string  S:\repo\vlang2\vlib\strings\builder.c.v:138
 : encoding__xml__XMLDocument_pretty_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:141
 : encoding__xml__XMLDocument_str  S:\repo\vlang2\vlib\encoding\xml\encoding.v:174
SymFromAddr failure: 126 (see https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes)

Reproduction Steps

Read xml large xml files

Expected Behavior

No exception

Current Behavior

unhandled exceptions

Possible Solution

No idea

Additional Information/Context

No response

V version

V 0.4.12 ae95cb6

Environment details (OS name and version, etc.)

|V full version      |V 0.4.12 fe6162e94dcb8669f7512edd5d39da10a3cc6c5b.ae95cb6
|:-------------------|:-------------------
|OS                  |windows, Microsoft Windows 11 Pro 26200 64-bit
|Processor           |24 cpus, 64bit, little endian, AMD Ryzen 9 5900X 12-Core Processor
|Memory              |72.48GB/127.92GB
|                    |
|V executable        |S:\repo\vlang2\v.exe
|V last modified time|2025-12-27 01:31:15
|                    |
|V home dir          |OK, value: S:\repo\vlang2
|VMODULES            |OK, value: C:\Users\john3\.vmodules
|VTMP                |OK, value: S:\temp\v_0
|Current working dir |contains spaces, value: S:\Business Projects\vPartsUnlimited
|                    |
|env VFLAGS          |"-g"
|Git version         |git version 2.52.0.windows.1
|V git status        |weekly.2025.51-125-gae95cb6f
|.git/config present |true
|                    |
|cc version          |N/A
|gcc version         |gcc (MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders, r8) 13.2.0
|clang version       |clang version 20.1.8
|msvc version        |Microsoft (R) C/C++ Optimizing Compiler Version 19.50.35720 for x64
|tcc version         |tcc version 0.9.27 (x86_64 Windows)
|tcc git status      |thirdparty-windows-amd64 b425ac82
|emcc version        |N/A
|glibc version       |N/A

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[quaesitor-scientiam]

This issue is showstopper for testing my program

[spytheman]

Read xml large xml files

That is not a good instruction for reproducing your problem.
Provide one such file, and code that fails to read it, so that other people can help you.