Open
Description
Issue: As explained in the title, live preview will crash when given the following setup:
Setup
(Lexer file)
lexer grammar PlaygroundScriptLexer;
channels {
ERROR
}
options {
superClass = PlaygroundScriptLexerBase;
}
CURLY_L : '{' { this.DeepenDepth(); };
TemplateCloseBrace : {this.IsInTemplateString()}? '}' {this.ProcessTemplateCloseBrace();} -> popMode;
CURLY_R : '}' { this.ExitDepth(); };
# Hidden unrelated lexer rules
BackTick: '`' -> pushMode(TEMPLATE);
mode TEMPLATE;
BackTickInside : '`' -> type(BackTick), popMode;
TemplateStringStartExpression : '@{' {this.ProcessTemplateOpenBrace();} -> pushMode(DEFAULT_MODE);
TemplateStringAtom : (~[`@{]|'\\@{'|'@Name')+;
(Grammar file)
parser grammar PlaygroundScriptParser;
options {
tokenVocab = PlaygroundScriptLexer;
superClass = PlaygroundScriptParserBase;
}
// The program would be the root node for everything
program
: tempstat+ EOF ;
tempstat
: CURLY_L tableEntries? CURLY_R
;
tableEntries
: tableEntry (',' tableEntry)* ','?
;
tableEntry
: WORD '=' yieldable ','?
| {this.isNamedFunction()}? func
;
And input a single opening curly brace ({) into Live Preview with start rule: program.
Errors
-
Upon entering
}, the Parse Tree display freezes and doesn't update. This will always happen.
1.1. Upon removing the closing curly brace}, the Parse Tree display properly refreshes. -
Upon entering
}, the plugin will sometimes crash & the following stack trace will be printed:
java.util.EmptyStackException
at org.antlr.v4.runtime.Lexer.popMode(Lexer.java:192)
at org.antlr.v4.runtime.atn.LexerPopModeAction.execute(LexerPopModeAction.java:58)
at org.antlr.v4.runtime.atn.LexerActionExecutor.execute(LexerActionExecutor.java:168)
at org.antlr.v4.runtime.atn.LexerATNSimulator.accept(LexerATNSimulator.java:366)
at org.antlr.v4.runtime.atn.LexerATNSimulator.failOrAccept(LexerATNSimulator.java:299)
at org.antlr.v4.runtime.atn.LexerATNSimulator.execATN(LexerATNSimulator.java:230)
at org.antlr.v4.runtime.atn.LexerATNSimulator.matchATN(LexerATNSimulator.java:156)
at org.antlr.v4.runtime.atn.LexerATNSimulator.match(LexerATNSimulator.java:111)
at org.antlr.v4.runtime.Lexer.nextToken(Lexer.java:141)
at org.antlr.v4.runtime.BufferedTokenStream.fetch(BufferedTokenStream.java:169)
at org.antlr.v4.runtime.BufferedTokenStream.sync(BufferedTokenStream.java:152)
at org.antlr.v4.runtime.BufferedTokenStream.consume(BufferedTokenStream.java:136)
at org.antlr.v4.runtime.Parser.consume(Parser.java:571)
at org.antlr.v4.runtime.Parser.match(Parser.java:205)
at org.antlr.intellij.plugin.parsing.PreviewParser.match(PreviewParser.java:62)
at org.antlr.v4.runtime.ParserInterpreter.visitState(ParserInterpreter.java:246)
at org.antlr.v4.runtime.ParserInterpreter.parse(ParserInterpreter.java:194)
at org.antlr.intellij.plugin.parsing.ParsingUtils.parseText(ParsingUtils.java:249)
at org.antlr.intellij.plugin.parsing.ParsingUtils.parseText(ParsingUtils.java:217)
at org.antlr.intellij.plugin.ANTLRv4PluginController.lambda$parseText$3(ANTLRv4PluginController.java:480)
at com.intellij.openapi.progress.util.BackgroundTaskUtil.lambda$computeInBackgroundAndTryWait$6(BackgroundTaskUtil.java:164)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:229)
at com.intellij.platform.diagnostic.telemetry.helpers.TraceKt.use(trace.kt:43)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:228)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$14(CoreProgressManager.java:680)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:755)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:711)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:679)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:77)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:209)
at com.intellij.openapi.progress.util.BackgroundTaskUtil.lambda$computeInBackgroundAndTryWait$7(BackgroundTaskUtil.java:163)
at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:265)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
at com.intellij.util.concurrency.ContextCallable.lambda$call$1(ContextCallable.java:86)
at com.intellij.util.concurrency.ContextCallable.call(ContextCallable.java:95)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:102)
at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:102)
at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:108)
at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:102)
at com.intellij.util.concurrency.ContextRunnable.run(ContextRunnable.java:27)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:735)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:732)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:732)
at java.base/java.lang.Thread.run(Thread.java:1583)
This crash is effectively random and unpredictable, but does happen.