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diff --git a/results/classifier/zero-shot-user-mode/runtime/866 b/results/classifier/zero-shot-user-mode/runtime/866
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@@ -0,0 +1,59 @@
+runtime: 0.454
+syscall: 0.313
+instruction: 0.232
+
+
+
+linux-user: substantial memory leak when threads are created and destroyed
+Description of problem:
+Substantial memory leak when the following simple program is executed on `qemu-arm`,
+```c
+// compile with `arm-none-linux-gnueabihf-gcc test_qemu.c -o test_qemu.out -pthread`
+
+#include <assert.h>
+#include <pthread.h>
+
+#define MAGIC_RETURN ((void *)42)
+
+void *thread_main(void *arg)
+{
+    return MAGIC_RETURN;
+}
+
+int main(int argc, char *argv[])
+{
+    size_t i;
+    for (i = 0;; i++)
+    {
+        pthread_t thread;
+        assert(pthread_create(&thread, NULL, thread_main, NULL) == 0);
+        void *ret;
+        assert(pthread_join(thread, &ret) == 0);
+        assert(ret == MAGIC_RETURN);
+    }
+
+    return 0;
+}
+```
+Steps to reproduce:
+1. 
+```
+export TOOLCHAIN_PREFIX=arm-none-linux-gnueabihf
+export ARMSDK=/${TOOLCHAIN_PREFIX}
+export SYSROOT=${ARMSDK}/${TOOLCHAIN_PREFIX}/libc
+export CC=${ARMSDK}/bin/${TOOLCHAIN_PREFIX}-gcc
+```
+2. Download the arm toolchain: `curl --output ${TOOLCHAIN_PREFIX}.tar.xz -L 'https://developer.arm.com/-/media/Files/downloads/gnu-a/10.2-2020.11/binrel/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf.tar.xz?revision=d0b90559-3960-4e4b-9297-7ddbc3e52783&la=en&hash=985078B758BC782BC338DB947347107FBCF8EF6B'`
+3. `mkdir -p ${ARMSDK} && tar xf ${TOOLCHAIN_PREFIX}.tar.xz -C ${ARMSDK} --strip-components=1`
+4. `$CC test_qemu.c -o test_qemu.out -pthread`
+5. `qemu-arm -L $SYSROOT ./test_qemu.out`
+6. Observe memory usage keeps ramping up and crashes the process once out of memory.
+Additional information:
+Valgrind annotation logs [annot.log](/uploads/f8d05d8f216d5a589e8da0758a345de6/annot.log) generated by a local build on master@0a301624c2f4ced3331ffd5bce85b4274fe132af from
+```bash
+valgrind --xtree-memory=full --xtree-memory-file=xtmemory.kcg bin/debug/native/qemu-arm -L $SYSROOT /mnt/f/test_qemu3.out
+# Send CTRL-C before the process crashes due to oom
+callgrind_annotate --auto=yes --inclusive=yes --sort=curB:100,curBk:100,totB:100,totBk:100,totFdB:100,totFdBk:100  xtmemory.kcg > annot.log
+```
+
+#