[Bug 58340] New: dbghelp: symt_add_func_line, possible use after free.

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58340

Bug ID: 58340
           Summary: dbghelp: symt_add_func_line, possible use after free.
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dbghelp
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

ASan reports function `symt_add_func_line`.
There in line 446 memory gets accessed via the pointer `prev`
which got freed in `vector_add` by a HeapReAlloc.

An example ASan output is available here:
https://gitlab.winehq.org/bernhardu/wine/-/blob/asan-pe_2025-05-06_wine-10.8...

This shows up only with ASAN_OPTION windows_hook_rtl_allocators=1.

A possible solution might be simply to repeat the assignment of `prev`
from line 429 after the `vector_add` in line 438?