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Current Debian testing builds libtsan/libasan with --as-needed, which
leads to libstdc++.so not being linked in. Compare Debian 10:

    kirr@link:~/src/tools/go/pygolang$ ldd /usr/lib/x86_64-linux-gnu/libasan.so.5
        linux-vdso.so.1 (0x00007ffe7e97f000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f00ad9d5000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f00ad9cb000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f00ad9aa000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f00ad7d2000)		<-- libstdc++
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f00ad64f000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f00ad48e000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f00ad472000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f00ae7c8000)

to Debian testing:

    kirr@deco:~/src/tools/go/pygolang$ ldd /usr/lib/x86_64-linu...