Capture AssertionError in PlantUML rendering

[sentry-io]

Sentry Issue: ASCIIDOC-INTELLIJ-PLUGIN-7EK

java.lang.AssertionError: null
    at net.sourceforge.plantuml.objectdiagram.command.CommandCreateJson.getJsonString(net/sourceforge/plantuml/objectdiagram/command/CommandCreateJson.java:166)
    at net.sourceforge.plantuml.objectdiagram.command.CommandCreateJson.getJsonValue(net/sourceforge/plantuml/objectdiagram/command/CommandCreateJson.java:151)
    at net.sourceforge.plantuml.objectdiagram.command.CommandCreateJson.finalVerification(net/sourceforge/plantuml/objectdiagram/command/CommandCreateJson.java:142)
    at net.sourceforge.plantuml.command.CommandMultilines2.isValid(net/sourceforge/plantuml/command/CommandMultilines2.java:133)
    at net.sourceforge.plantuml.command.PSystemCommandFactory.isMultilineCommandOk(net/sourceforge/plantuml/command/PSystemCommandFactory.java:211)
    at net.sourceforge.plantuml.command.PSystemCommandFactory.getCandidate(net/sourceforge/plantuml/command/PSystemCommandFactory.java:195)
    at net.sourceforge.plantuml.command.PSystemCommandFactory.executeFewLines(net/sourceforge/plantuml/command/PSystemCommandFactory.java:148)
    at net.sourceforge.plantuml.command.PSystemCommandFactory.createSystem(net/sourceforge/plantuml/command/PSystemCommandFactory.java:138)
    at net.sourceforge.plantuml.PSystemBuilder.createPSystem(net/sourceforge/plantuml/PSystemBuilder.java:187)
    at net.sourceforge.plantuml.BlockUml.getDiagram(net/sourceforge/plantuml/BlockUml.java:216)
    at org.asciidoctor.diagram.plantuml.PlantUMLPreprocessor.preprocess(org/asciidoctor/diagram/plantuml/PlantUMLPreprocessor.java:95)
    at org.asciidoctor.diagram.plantuml.PlantUMLPreprocessor.generate(org/asciidoctor/diagram/plantuml/PlantUMLPreprocessor.java:52)
    at org.asciidoctor.diagram.CommandProcessor.processRequest(org/asciidoctor/diagram/CommandProcessor.java:40)
    at org.asciidoctor.diagram.CommandProcessor.processRequest(org/asciidoctor/diagram/CommandProcessor.java:19)
    at jdk.internal.reflect.GeneratedMethodAccessor896.invoke(jdk/internal/reflect/GeneratedMethodAccessor896)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(jdk/internal/reflect/DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:568)
    at org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(org/jruby/javasupport/JavaMethod.java:315)
    at org.jruby.javasupport.JavaMethod.invokeDirect(org/jruby/javasupport/JavaMethod.java:176)
    at RUBY.send_request(uri:classloader:/gems/asciidoctor-diagram-2.3.0/lib/asciidoctor-diagram/util/java_jruby.rb:31)
    at RUBY.load_code(uri:classloader:/gems/asciidoctor-diagram-2.3.0/lib/asciidoctor-diagram/plantuml/converter.rb:169)
    at RUBY.code(uri:classloader:/gems/asciidoctor-diagram-2.3.0/lib/asciidoctor-diagram/plantuml/converter.rb:153)
    at RUBY.convert(uri:classloader:/gems/asciidoctor-diagram-2.3.0/lib/asciidoctor-diagram/plantuml/converter.rb:85)
    at RUBY.create_image_block(uri:classloader:/gems/asciidoctor-diagram-2.3.0/lib/asciidoctor-diagram/diagram_processor.rb:189)
    at RUBY.process(uri:classloader:/gems/asciidoctor-diagram-2.3.0/lib/asciidoctor-diagram/diagram_processor.rb:99)
    at RUBY.process(<script>:28)
    at org.jruby.RubyMethod.call(org/jruby/RubyMethod.java:144)
    at org.jruby.RubyMethod$INVOKER$i$call.call(org/jruby/RubyMethod$INVOKER$i$call.gen)
    at RUBY.build_block(uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/parser.rb:1056)
    at uri_3a_classloader_3a_.gems.asciidoctor_minus_2_dot_0_dot_20.lib.asciidoctor.parser.invokeOther80:build_block(uri_3a_classloader_3a_/gems/asciidoctor_minus_2_dot_0_dot_20/lib/asciidoctor/uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/parser.rb:907)
    at uri_3a_classloader_3a_.gems.asciidoctor_minus_2_dot_0_dot_20.lib.asciidoctor.parser.next_block(uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/parser.rb:907)
    at uri_3a_classloader_3a_.gems.asciidoctor_minus_2_dot_0_dot_20.lib.asciidoctor.parser.invokeOther70:next_block(uri_3a_classloader_3a_/gems/asciidoctor_minus_2_dot_0_dot_20/lib/asciidoctor/uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/parser.rb:397)
    at uri_3a_classloader_3a_.gems.asciidoctor_minus_2_dot_0_dot_20.lib.asciidoctor.parser.next_section(uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/parser.rb:397)
    at RUBY.parse(uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/parser.rb:97)
    at RUBY.parse(uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/document.rb:538)
    at RUBY.load(uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/load.rb:84)
    at RUBY.convert(uri:classloader:/gems/asciidoctor-2.0.20/lib/asciidoctor/convert.rb:78)
    at org.jruby.RubyClass.finvoke(org/jruby/RubyClass.java:792)
    at org.jruby.RubyBasicObject.callMethod(org/jruby/RubyBasicObject.java:371)
    at org.asciidoctor.jruby.internal.JRubyAsciidoctor.convert(org/asciidoctor/jruby/internal/JRubyAsciidoctor.java:321)
    at org.asciidoctor.jruby.internal.JRubyAsciidoctor.convert(org/asciidoctor/jruby/internal/JRubyAsciidoctor.java:346)
    at org.asciidoctor.jruby.internal.JRubyAsciidoctor.convert(org/asciidoctor/jruby/internal/JRubyAsciidoctor.java:341)
    at org.asciidoc.intellij.AsciiDocWrapper.render(org/asciidoc/intellij/AsciiDocWrapper.java:822)
    at org.asciidoc.intellij.AsciiDocWrapper.render(org/asciidoc/intellij/AsciiDocWrapper.java:788)
    at org.asciidoc.intellij.AsciiDocWrapper.render(org/asciidoc/intellij/AsciiDocWrapper.java:777)
    at org.asciidoc.intellij.editor.AsciiDocPreviewEditor.lambda$render$0(org/asciidoc/intellij/editor/AsciiDocPreviewEditor.java:152)
...
(50 additional frame(s) were not displayed)

[ahus1]

Normally, you should not catch errors, and only throw errors when they are fatal. Still, catching this AssertionError seems to be without alternative to capture the error message for the preview.

Fixed in next release.