R_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI vector(initializer_list<value_type> __il) {
              |                                                                                           ^
    
    In this case, `ClBlacklist` is an instance of `cl::opt`, not a
    `std::string` as expected. Use `getValue()` to get the actual
    `std::string` value.
    
    PR:             292109
    Approved by:    brooks (maintainer)
    MFH:            2026Q1
    
    (cherry picked from commit d3097136efd1edc01760f7659ff6c9ded2594d96)
---
 devel/llvm13/files/patch-llvm_tools_sancov_sancov.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/devel/llvm13/files/patch-llvm_tools_sancov_sancov.cpp b/devel/llvm13/files/patch-llvm_tools_sancov_sancov.cpp
new file mode 100644
index 000000000000..12e1cae28c3b
--- /dev/null
+++ b/devel/llvm13/files/patch-llvm_tools_sancov_sancov.cpp
@@ -0,0 +1,11 @@
+--- llvm/tools/sancov/sancov.cpp.orig	2021-06-28 16:23:38 UTC
++++ llvm/tools/sancov/sancov.cpp
+@@ -509,7 +509,7 @@ class Blacklists { (private)
+     if (ClBlacklist.empty())
+       return std::unique_ptr<SpecialCaseList>();
+ 
+-    return SpecialCaseList::createOrDie({{ClBlacklist}},
++    return SpecialCaseList::createOrDie({{ClBlacklist.getValue()}},
+                                         *vfs::getRealFileSystem());
+   }
+   std::unique_ptr<SpecialCaseList> DefaultBlacklist;