"Incorrect conversion" build failure(s) — clang 3.6.0

PackageVersionSupposed error messageFull log Bug report
0ad 0.0.18-1jsgcinlines.h:411:5: error: implicit conversion of nullptr constant to 'bool' [-Werror,-Wnull-conversion] Log
iceweasel 31.5.3esr-1TypedObject.cpp:713:16: error: implicit conversion of nullptr constant to 'bool' [-Werror,-Wnull-conversion] Log
libnet-jabber-loudmouth-perl 0.07-3inline.h:311:9: error: nonnull parameter 'pv' will evaluate to 'true' on first encounter [-Werror,-Wpointer-bool-conversion] Log
libxkbfile 1:1.0.8-1../../src/cout.c:48:46: error: address of array 'xkb->names->vmods' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion] Log
roboptim-core 2.0-7differentiable-function.hxx:55:15: error: implicit conversion changes signedness: 'const unsigned int' to 'const int' [-Werror,-Wsign-conversion] Log
squid3 3.4.8-6MemPoolChunked.cc:394:10: error: 'this' pointer cannot be null in well-defined C++ code; pointer may be assumed to always convert to true [-Werror,-Wundefined-bool-conversion] Log
uwsgi 2.0.7-1inline.h:311:9: error: nonnull parameter 'pv' will evaluate to 'true' on first encounter [-Werror,-Wpointer-bool-conversion] Log

7 errors