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Misc. bug: test-model-resolution crashes on Windows MSYS2 UCRT64 #26552
Description
Name and Version
$ build_vk_shared/bin/Debug/llama-cli.exe --version
version: 10257 (22dc605)
built with GNU 16.1.0 for Windows AMD64
Operating systems
Windows
Which llama.cpp modules do you know to be affected?
Unit test
Command line
test-model-resolution.exeProblem description & steps to reproduce
I'm seeing following crash. CI is also failing. VisualStudio build works so seems like a MSYS2 environment issue.
# build_vk_shared/bin/test-model-resolution.exe
test-model-resolution: plan resolution on 14 cases
flat exact tag
flat default
unsloth fallback
flat hf_file
(null)
Segmentation fault build_vk_shared/bin/test-model-resolution.exe
When I look at gdb debug build output the array content of plan_cases[4] is broken.
(gdb) bt
#0 0x00007ff661cbfb90 in std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::size (this=0x0)
at C:/msys64/ucrt64/include/c++/16.1.0/bits/stl_vector.h:1109
#1 0x00007ff661ca4776 in test_plan_resolution ()
at C:/Users/devcloud/Documents/llama.cpp/tests/test-model-resolution.cpp:325
#2 0x00007ff661ca89cc in main ()
at C:/Users/devcloud/Documents/llama.cpp/tests/test-model-resolution.cpp:497
(gdb) p plan_cases[4]
$16 = {name = 0x0, files = <error reading variable: Cannot access memory at address 0x8>,
hf_repo = 0x0, hf_file = 0x0, sidecars = false, order_dependent = false, primary = 0x0,
model_files = std::vector of length 0, capacity 0, mmproj = 0x0, mtp = 0x0, dflash = 0x0,
eagle3 = 0x0, dspark = 0x0}
Activity
rillomas commentedon Aug 4, 2026
Following diff fixes the crash. VS2026 works with the original code so seems like a compiler/runtime issue or something. Possibly undefined behavior since we're initializing
&files(reference to a vector) with a temporary vector where its lifetime is not guaranteed?