After updating from 0.9.2 to 0.9.5 getting the error “java.lang.IllegalArgumentException: Illegal group reference”

问题

My test suite was working fine until it was using the version 0.9.2.

I have a test runner with KarateOptions in it to specify the feature files that are to be executed

@KarateOptions(tags = {"~@ignore"},
    features = {
            "src/test/java/com/pro/api/tests/features/beforesuitescenarios/feature1.feature",
             "src/test/java/com/pro/api/tests/features/customerscenarios/feature2.feature",
            "src/test/java/com/pro/api/tests/features/servicerequestscenarios/feature3.feature",
            "src/test/java/com/pro/api/tests/features/invoicescenarios/feature4.feature",

    })

And the test runner for this was using cucumber runner,

  @Test
public void testAllFeatures() throws Exception { 
    String karateOutputPath = "target/surefire-reports";
    KarateStats stats = CucumberRunner.parallel(getClass(), 1, karateOutputPath);
    generateReport(karateOutputPath);
    assertTrue("There are scenario failures", stats.getFailCount() == 0);
}

I tried upgrading the framework to 0.9.5 and modified the runner like it's mentioned in the latest docs,

@Test
public void testAllFeatures() throws Exception {

    String karateOutputPath = "target/surefire-reports";
    Results stats = Runner.parallel(getClass(), 1, karateOutputPath);
    generateReport(karateOutputPath);
    assertTrue("There are scenario failures", stats.getFailCount() == 0);
}

Now when I execute this suite, The tests are getting executed properly. But after the test execution of all the feature files are completed, It is throwing an error for the line

Results stats = Runner.parallel(getClass(), 1, karateOutputPath);

With the following IllegalArgumentException,

[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1,295.291 s <<< 
FAILURE! - in com.pro.api.tests.features.TestRunner
[ERROR] testAllFeatures(com.pro.api.tests.features.TestRunner)  Time elapsed: 1,295.22 s  
 <<< ERROR!
java.lang.IllegalArgumentException: Illegal group reference
at com.pro.api.tests.features.TestRunner.testAllFeatures(TestRunner.java:55)

What am I missing while calling the runner ? How to fix this issue ?

Further when I tried to add exception handler for the failing step, I got the following error log,

java.lang.IllegalArgumentException: Illegal group reference
at java.base/java.util.regex.Matcher.appendExpandedReplacement(Matcher.java:1068)
at java.base/java.util.regex.Matcher.appendReplacement(Matcher.java:998)
at java.base/java.util.regex.Matcher.replaceFirst(Matcher.java:1408)
at java.base/java.lang.String.replaceFirst(String.java:2081)
at com.intuit.karate.core.Engine.saveTimelineHtml(Engine.java:500)
at com.intuit.karate.Runner.parallel(Runner.java:357)
at com.intuit.karate.Runner$Builder.parallel(Runner.java:181)
at com.pro.api.tests.features.TestRunner.testAllFeatures(TestRunner.java:56)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1,181.97 s <<< FAILURE! - in com.pro.api.tests.features.TestRunner
[ERROR] testAllFeatures(com.pro.api.tests.features.TestRunner)  Time elapsed: 1,181.905 s  <<< ERROR!
java.lang.NullPointerException
    at com.pro.api.tests.features.TestRunner.testAllFeatures(TestRunner.java:61)

Something in saveTimelineHtml is failing