Disable UndefinedBehaviorSanitizer in debug build packages.

Debug builds from CI have been crashing because they can't find the
UBSan dylib (even though it was in the bundles).

.travis.yml

@@ -87,9 +87,7 @@ script:
         ./package.sh || (cat build_and_install.log && travis_terminate 1);
     fi
 # Install the .pkg.
-# TODO: Debug packages are failing to install on Travis, but I can't reproduce the problem locally,
-#       so temporarily allow debug builds to pass even if the install fails.
-  - sudo installer -pkg Background-Music-*/BackgroundMusic-*.pkg -target / -verbose -dumplog || [[ "$TRAVIS_TAG" =~ .*DEBUG.* ]]
+  - sudo installer -pkg Background-Music-*/BackgroundMusic-*.pkg -target / -verbose -dumplog
 # Print the installer logs. This only prints the current day's logs.
   - echo -en '/var/log/install.log\ntravis_fold:start:install.log\\r'
   - grep -A 9999 $(date +%Y-%m-%d) /var/log/install.log

build_and_install.sh

@@ -662,6 +662,13 @@ else
     ENABLE_ASAN="${ENABLE_ASAN:-NO}"
 fi
 
+enableUBSanArg() {
+    if [[ -n "$ENABLE_UBSAN" ]]; then
+        echo "-enableUndefinedBehaviorSanitizer"
+        echo "$ENABLE_UBSAN"
+    fi
+}
+
 # Clean all projects. Done separately to workaround what I think is a bug in Xcode 10.0. If you just
 # add "clean" to the other xcodebuild commands, they seem to fail because of the DSTROOT="/" arg.
 if [[ "${CLEAN}" != "" ]]; then
@@ -714,6 +721,7 @@ echo "[1/3] ${ACTIONING} the virtual audio device $(bold_face ${DRIVER_DIR}) to"
     ${SUDO} "${XCODEBUILD}" -scheme "Background Music Device" \
                             -configuration ${CONFIGURATION} \
                             -enableAddressSanitizer ${ENABLE_ASAN} \
+                            $(enableUBSanArg) \
                             $(archivePath BGMDriver) \
                             BUILD_DIR=./build \
                             RUN_CLANG_STATIC_ANALYZER=0 \
@@ -743,6 +751,7 @@ xpcHelperInstallPathArg() {
     ${SUDO} "${XCODEBUILD}" -scheme BGMXPCHelper \
                             -configuration ${CONFIGURATION} \
                             -enableAddressSanitizer ${ENABLE_ASAN} \
+                            $(enableUBSanArg) \
                             $(archivePath BGMXPCHelper) \
                             BUILD_DIR=./build \
                             RUN_CLANG_STATIC_ANALYZER=0 \
@@ -764,6 +773,7 @@ echo "[3/3] ${ACTIONING} $(bold_face ${APP_DIR}) to $(bold_face ${APP_PATH})" \
     ${SUDO} "${XCODEBUILD}" -scheme "Background Music" \
                             -configuration ${CONFIGURATION} \
                             -enableAddressSanitizer ${ENABLE_ASAN} \
+                            $(enableUBSanArg) \
                             $(archivePath BGMApp) \
                             BUILD_DIR=./build \
                             RUN_CLANG_STATIC_ANALYZER=0 \

package.sh

@@ -89,12 +89,14 @@ if [[ $packaging_operation == "repackage" ]]; then
 elif [[ $packaging_operation == "make_debug_package" ]]; then
     # Build using the debug configuration.
     #
-    # Disable AddressSanitizer so we can distribute debug packages to users reporting bugs without
-    # worrying about loading the AddressSanitizer dylib in coreaudiod.
+    # Disable AddressSanitizer and UndefinedBehaviorSanitizer so we can distribute debug packages to
+    # users without worrying about loading the AddressSanitizer and UndefinedBehaviorSanitizer
+    # dylibs in coreaudiod. We've also had issues loading those dylibs in the other binaries when
+    # the binaries were built on other systems.
     #
     # TODO: Would debug packages be more useful if they were built with optimization (i.e. using the
     #       DebugOpt configuration instead of Debug)?
-    ENABLE_ASAN=NO bash build_and_install.sh -b -d
+    ENABLE_ASAN=NO ENABLE_UBSAN=NO bash build_and_install.sh -b -d
     build_status=$?
 
     # Set the paths to the build products (i.e. the bundles).