SourceLookup fails for dependencies about java-debug HOT 2 OPEN

@testforstephen please take a look.

from java-debug.

cannot reproduce.

i tried gradle dependencies by debugging a sample gradle project https://github.com/gradle/gradle-build-scan-quickstart, i can set breakpoint at the source code from third party jar com.google.guava:guava.

Here are some additional details about how does the debugger set breakpoint at third-party jars.

1. when set breakpoint in third-party jar, the client will send jdt schema jdt://contents/xxx.jar/xxx.class to debugger server, then the debugger will find the Java Model IClassFile by the uri.
2. The debugger need parse the fully qualified class where the breakpoint locates before setting it in debuggee jvm. Currently, the debugger will use jdt ast parser to parse the source contents.
3. For every breakpoint request, the debugger will new an ASTParser, and set the IClassFile as the parser's source by invoking setSource(IClassFile), that means the IClassFile's attached source code will be used. When eclipse workspace cannot detect the attached source correctly for the target class file, the parser would fail.

Looks like your error happens when the ASTParser tries to get the attached source for xercesImpl.jar.

from java-debug.