jpackage failed with NPE whenever --file-associations provided

ADDITIONAL SYSTEM INFORMATION :
Windows 10
java --version
openjdk 14-jpackage 2020-03-17
OpenJDK Runtime Environment (build 14-jpackage+1-35)
OpenJDK 64-Bit Server VM (build 14-jpackage+1-35, mixed mode, sharing)


A DESCRIPTION OF THE PROBLEM :
jpackage fails with Bundler EXE Installer skipped because of a configuration problem: java.lang.NullPointerException.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
jpackage --package-type exe -o bundles -n DrumScoreEditor --app-image bundles/DrumScoreEditor --app-version 2.9 --win-menu --win-shortcut --file-associations autobuild/filetypes.txt --verbose




EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Self-extracting installer bundles/DrumScoreEditor-2.9.exe should be created
ACTUAL -
Running [C:\Program Files (x86)\WiX Toolset v3.11\bin\candle.exe, /?]
Detected [C:\Program Files (x86)\WiX Toolset v3.11\bin\candle.exe] version [3.11].
Running [C:\Program Files (x86)\WiX Toolset v3.11\bin\light.exe, /?]
Detected [C:\Program Files (x86)\WiX Toolset v3.11\bin\light.exe] version [3.11].
Running [C:\Program Files (x86)\WiX Toolset v3.11\bin\candle.exe, /?]
Detected [C:\Program Files (x86)\WiX Toolset v3.11\bin\candle.exe] version [3.11].
Running [C:\Program Files (x86)\WiX Toolset v3.11\bin\light.exe, /?]
Detected [C:\Program Files (x86)\WiX Toolset v3.11\bin\light.exe] version [3.11].
Running [C:\Program Files (x86)\WiX Toolset v3.11\bin\light.exe, /?]
Detected [C:\Program Files (x86)\WiX Toolset v3.11\bin\light.exe] version [3.11].
WiX 3.6 detected. Enabling advanced cleanup action.
jdk.jpackage.internal.ConfigException: java.lang.NullPointerException
        at jdk.jpackage/jdk.jpackage.internal.WinMsiBundler.validate(WinMsiBundler.java:357)
        at jdk.jpackage/jdk.jpackage.internal.WinExeBundler.validate(WinExeBundler.java:94)
        at jdk.jpackage/jdk.jpackage.internal.Arguments.generateBundle(Arguments.java:619)
        at jdk.jpackage/jdk.jpackage.internal.Arguments.processArguments(Arguments.java:513)
        at jdk.jpackage/jdk.jpackage.main.Main.execute(Main.java:97)
        at jdk.jpackage/jdk.jpackage.main.Main.main(Main.java:51)
Caused by: java.lang.NullPointerException
        at jdk.jpackage/jdk.jpackage.internal.WinMsiBundler.validate(WinMsiBundler.java:342)
        ... 5 more
jdk.jpackage.internal.PackagerException: Bundler EXE Installer skipped because of a configuration problem: java.lang.NullPointerException.
        at jdk.jpackage/jdk.jpackage.internal.Arguments.generateBundle(Arguments.java:636)
        at jdk.jpackage/jdk.jpackage.internal.Arguments.processArguments(Arguments.java:513)
        at jdk.jpackage/jdk.jpackage.main.Main.execute(Main.java:97)
        at jdk.jpackage/jdk.jpackage.main.Main.main(Main.java:51)
Caused by: jdk.jpackage.internal.ConfigException: java.lang.NullPointerException
        at jdk.jpackage/jdk.jpackage.internal.WinMsiBundler.validate(WinMsiBundler.java:357)
        at jdk.jpackage/jdk.jpackage.internal.WinExeBundler.validate(WinExeBundler.java:94)
        at jdk.jpackage/jdk.jpackage.internal.Arguments.generateBundle(Arguments.java:619)
        ... 3 more
Caused by: java.lang.NullPointerException
        at jdk.jpackage/jdk.jpackage.internal.WinMsiBundler.validate(WinMsiBundler.java:342)
        ... 5 more


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Any windows java app image
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CUSTOMER SUBMITTED WORKAROUND :
None, remove --file-associations to create installer, but has no file-associations

FREQUENCY : always