FSInfo#getJarClassPath throws an exception not declared in its throws clause

Jaikiran Pai jai.forums2013 at gmail.com
Sat Oct 12 11:33:32 UTC 2019

Thank you Jon. I've created
https://bugs.openjdk.java.net/browse/JDK-8232170 and submitted a RFR
thread with the patch.


On 11/10/19 8:20 PM, Jonathan Gibbons wrote:
> Jaikiran,
> Not catching InvalidPathException is a bug and an unforeseen
> consequence of converting the file manager from using java.io.File
> to java.nio.file.Path.
> -- Jon
> On 10/11/19 7:26 AM, Jaikiran Pai wrote:
>> In recent versions of JDK (I think after JDK 8), the
>> com.sun.tools.javac.file.FSInfo#getJarClassPath(...) is throwing a
>> java.nio.file.InvalidPathException in certain cases when the classpath
>> entry it is parsing isn't a valid one. This is because of its usage of
>> the java.nio.file.Path APIs, specifically
>> https://github.com/openjdk/jdk/blob/4ad3d82c76936a8927ed8a505689a3683144ad98/src/jdk.compiler/share/classes/com/sun/tools/javac/file/FSInfo.java#L112.
>> The throws clause of this FSInfo#getJarClassPath API lists IOException,
>> so this method is now throwing an exception which isn't listed in its
>> throws clause. As a result, callers, like the
>> com.sun.tools.javac.file.Locations.SearchPath#addJarClassPath(...)
>> https://github.com/openjdk/jdk/blob/4ad3d82c76936a8927ed8a505689a3683144ad98/src/jdk.compiler/share/classes/com/sun/tools/javac/file/Locations.java#L425
>> are no longer able to catch this exception and log it and move on.
>> Instead it gets propagated all the way back to the top level callers,
>> thus breaking applications which are trying to compile java files
>> programmatically.
>> Would this be considered a bug? If so, I can create a JBS issue and
>> provide a patch (and will try a jtreg test case too) for review.
>> Although these classes are internal and not public API, the calling code
>> is actually using public APIs (which internally end up calling these
>> APIs). Like here
>> https://github.com/quarkusio/quarkus/blob/master/core/devmode/src/main/java/io/quarkus/dev/JavaCompilationProvider.java#L48.
>> For a lengthy discussion/context - please read the comments in this
>> issue https://github.com/quarkusio/quarkus/issues/3592
>> -Jaikiran

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