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https://issues.apache.org/jira/browse/GROOVY-11391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eric Milles updated GROOVY-11391:
---------------------------------
Language: groovy
> GroovyClassLoader hangs on parsing certain types of scripts
> -----------------------------------------------------------
>
> Key: GROOVY-11391
> URL: https://issues.apache.org/jira/browse/GROOVY-11391
> Project: Groovy
> Issue Type: Bug
> Components: ast builder, class generator, Compiler, parser,
> parser-antlr4
> Affects Versions: 3.0.19, 3.0.21, 4.0.21
> Reporter: Fridman Viktor
> Priority: Major
> Attachments: image-2024-05-30-13-32-34-933.png
>
>
> i have a simple sample of code:
> {code:java}
> String script = "import com.atlassian.jira.component.ComponentAccessor\n" +
> "\n" +
> "Set<String> asdf1 = [\n" +
> " \"abc\"\n" +
> "] as Set<String>\n" +
> "\n" +
> "Set<String> asdf2 = [\n" +
> " \"def\"\n" +
> "] as Set<String>\n" +
> "\n" +
> "Set<String> asdf3 = [\n" +
> " \"qwer\",\n" +
> " \"wert\"\n" +
> "] as Set<String>\n" +
> "\n" +
> "Set<String> asdf4 = [\n" +
> " \"qwerty\"\n" +
> "] as Set<String>\n" +
> "\n" +
> "Set<String> asdf5 = [\n" +
> " \"asdvlkjn\",\n" +
> " \"asdlvkasdlkvm\",\n" +
> " \"asdviamsdov\",\n" +
> " \"zxcv\",\n" +
> " \"vcxz\",\n" +
> " \"xcvb\",\n" +
> " \"bvcx\"\n" +
> "] as Set<String>\n" +
> "\n" +
> "Set<String> asdf6 = [ // qwer ty \"asdf\"\n" +
> " \"dfbjknsldfkb \",\n" +
> " \"bvcxcx\",\n" +
> " \"xcvbbv\",\n" +
> " \"bvcx\",\n" +
> " \"xcvb\"\n" +
> "] as Set<String>\n" +
> "\n" +
> "Set<String> asdf7 = [ //aqwerty\n" +
> " \"asdfghj\",\n" +
> " \"jhgfdsa\",\n" +
> " \"asdfg\",\n" +
> " \"gfdsa\"\n" +
> "] as Set<String>\n" +
> "\n" +
> "Set<String> asdf8 = [ //qwerrty\n" +
> " \"zxcv\",\n" +
> " \"vcxz\",\n" +
> " \"xcvbbnm,.\"\n" +
> "] as Set<String>";
> GroovyClassLoader gcl = new GroovyClassLoader();
> GroovyCodeSource codeSource = new GroovyCodeSource(script, "Script",
> "/groovy/script");
> long l = System.currentTimeMillis();
> try {
> Class aClass = gcl.parseClass(codeSource);
> System.out.println(aClass);
> }
> catch (Exception e) {
> long l1 = System.currentTimeMillis();
> System.out.println(l1 - l);
> }{code}
> code parsing hangs for a looooooooong time.
> but if i add ';' after every string like
> {code:java}
> ] as Set<String>{code}
> so it will look like
> {code:java}
> ] as Set<String>;{code}
> in groovy-script, it works fast.
>
> the problem seems somewhere deep in ParserATNSimulator, its configurations or
> predictive parsing at all (seems quite greedy) - randomly stopped debugger
> shows that while it hangs:
>
> !image-2024-05-30-13-32-34-933.png|width=423,height=1356!
> i understand that the code of script could have errors (for example, import
> could not be found or smthng else), but i think that the parser hanging is
> quite abnormal
>
> in pom tried both (separately ofc):
> implementation 'org.apache.groovy:groovy-all:4.0.21'
> implementation 'org.codehaus.groovy:groovy-all:3.0.21'
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