diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f992215f..0520427a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -565,6 +565,21 @@ jobs:
 
       # ⭐ And the one that is this machine, run rather than inspected — the same
       # criterion the Linux job holds itself to, applied from a different host.
+      # ⭐ AND A HOSTED C++ PROGRAM, WHICH IS WHERE THREADS AND FILES ARE.
+      #
+      # `same-source` also runs on bare metal, so it cannot start a thread;
+      # `examples/cxx` can, and on Windows a joined std::thread was an access
+      # violation until openkal-musl 0.13.2 widened C++ `pthread_t`.
+      - name: A hosted C++ program above it runs on this host
+        run: |
+          set -euo pipefail
+          cd examples/cxx
+          rm -rf target
+          # The other observations were written for Linux; this step asks for the
+          # thread, so a difference elsewhere is reported without failing it.
+          mcpp run --target '${{ matrix.native }}' 2>&1 | tee out.log || true
+          grep -q 'ok: a thread is started and joined' out.log
+
       - name: The artefact for this host runs on it
         run: |
           set -euo pipefail
diff --git a/examples/cxx/src/main.cpp b/examples/cxx/src/main.cpp
index f0bf52b8..8c3b3645 100644
--- a/examples/cxx/src/main.cpp
+++ b/examples/cxx/src/main.cpp
@@ -18,6 +18,7 @@
 #include <filesystem>
 #include <random>
 #include <system_error>
+#include <thread>
 
 // ⭐ THREE NAMES A PROGRAM ABOVE THIS STACK MAY USE, ASSERTED BY COMPILING.
 //
@@ -67,6 +68,20 @@ int main() {
     check(hidden + weak == 18 && weak_alias{3}.value == 3,
           "hidden, weak and weak_alias are the program's own identifiers");
 
+    // --- std::thread, which is the C++ face of openkal.task -----------------
+    //
+    // ⚠️ A THREAD THAT STARTS IS NOT A THREAD THAT IS JOINED. libc++ keeps the
+    // pthread_t it was given, and musl declared that type `unsigned long` for
+    // C++ --- thirty-two bits on Windows --- so the join read through half a
+    // pointer and ended the program. Fixed in openkal-musl 0.13.2.
+    {
+        int written = 0;
+        std::thread worker([&] { written = 42; });
+        const bool joinable = worker.joinable();
+        worker.join();
+        check(joinable && written == 42 && !worker.joinable(), "a thread is started and joined");
+    }
+
     // --- std::filesystem, which is the C++ face of openkal.fs ---------------
 
     namespace fs = std::filesystem;
diff --git a/mcpp.toml b/mcpp.toml
index 0f1b172f..d2ea818d 100644
--- a/mcpp.toml
+++ b/mcpp.toml
@@ -1,7 +1,7 @@
 [package]
 namespace   = "mcpplibs"
 name        = "openkal-llvm-runtime"
-version     = "0.9.2"
+version     = "0.9.3"
 description = "LLVM's C++ runtime libraries — libc++, libc++abi and libunwind — configured for openkal-musl rather than for a host C library."
 license     = "Apache-2.0"
 authors     = ["mcpplibs"]
@@ -208,7 +208,7 @@ sources = [
 cflags = ["-DDISABLE_AARCH64_FMV=1"]
 
 [dependencies]
-openkal-musl = "0.13.1"
+openkal-musl = "0.13.2"
 
 [build]
 cxx_standard = "c++23"