OS: macOS 10.14.5
Java version "1.8.0_121"
Jetifier version: 1.0.0-beta04

Let there be a Library Foo with the following 'proguard-rules.txt' file:

# DBFlow
-keep class * extends com.raizlabs.android.dbflow.config.DatabaseHolder { *; }
-dontwarn com.raizlabs.android.dbflow.**
# Note: the configuration keeps the entry point 'com.raizlabs.android.dbflow.config.FlowManager$GlobalDatabaseHolder { FlowManager$GlobalDatabaseHolder(com.raizlabs.android.dbflow.config.FlowManager$1); }', but not the descriptor class 'com.raizlabs.android.dbflow.config.FlowManager$1'
-keep class com.raizlabs.android.dbflow.config.FlowManager$*

When trying to jetify this library:

./jetifier-standalone -i /Users/someuser/Downloads/foo/foo.aar -o newfoo.aar

The Jetifier fails with the following output:

Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal repetition near index 147
com/raizlabs/android/dbflow/.*
# Note: the configuration keeps the entry point 'com/raizlabs/android/dbflow/config/FlowManager$GlobalDatabaseHolder { FlowManager$GlobalDatabaseHolder(com/raizlabs/android/dbflow/config/FlowManager$1); }'
^
at java.util.regex.Pattern.error(Pattern.java:1955)
at java.util.regex.Pattern.closure(Pattern.java:3157)
at java.util.regex.Pattern.sequence(Pattern.java:2134)
at java.util.regex.Pattern.expr(Pattern.java:1996)
at java.util.regex.Pattern.compile(Pattern.java:1696)
at java.util.regex.Pattern.<init>(Pattern.java:1351)
at java.util.regex.Pattern.compile(Pattern.java:1028)
at com.android.tools.build.jetifier.core.type.TypesMap.matchOldProguardForNewTypes(TypesMap.kt:112)
[...]

If i remove the notes, the new 'proguard-rules.txt' looks like this:

# DBFlow
-keep class * extends com.raizlabs.android.dbflow.config.DatabaseHolder { *; }
-dontwarn com.raizlabs.android.dbflow.**
-keep class com.raizlabs.android.dbflow.config.FlowManager$*

And this runs through the jetifier just fine. Please provide a fix for this issue, since i have to patch my dependencies currently in order to make AndroidX work for me.