A language with id `regex` is not installed. Did you mean `regex`? Installed languages are: `regex`

[JaroslavTulach]

Describe GraalVM and your environment :

• GraalVM version or commit id if built from source: GraalVM CE 21.0.2+13.1 (build 21.0.2+13-jvmci-23.1-b30)
• CE or EE: CE
• JDK version: JDK21
• OS and OS Version: Ubutnu
• Architecture: amd64
• The output of java -Xinternalversion:

OpenJDK 64-Bit Server VM (21.0.2+13-jvmci-23.1-b30) for linux-amd64 JRE (21.0.2+13-jvmci-23.1-b30), built on 2024-01-06T13:12:14Z by "buildslave" with gcc 11.2.0

Have you verified this issue still happens when using the latest snapshot?
You can find snapshot builds here: https://github.com/graalvm/graalvm-ce-dev-builds/releases

Describe the issue

This is a funny error message:

Caused by: java.lang.IllegalArgumentException: A language with id 'regex' is not installed. Did you mean 'regex'? Installed languages are: [internal/nfi-native, arrow, epb, enso, regex, js, nfi, python].
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotEngineException.illegalArgument(PolyglotEngineException.java:129)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotEngineImpl.throwNotInstalled(PolyglotEngineImpl.java:1191)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotEngineImpl.requireLanguage(PolyglotEngineImpl.java:1180)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotContextImpl.requirePublicLanguage(PolyglotContextImpl.java:1915)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotContextImpl.lookupLanguageContext(PolyglotContextImpl.java:1877)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotContextImpl.initializeLanguage(PolyglotContextImpl.java:1846)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotContextDispatch.initializeLanguage(PolyglotContextDispatch.java:57)
        at org.graalvm.polyglot/org.graalvm.polyglot.Context.initialize(Context.java:617)
        at org.enso.language.server/org.enso.languageserver.boot.resource.TruffleContextInitialization.initComponent(TruffleContextInitialization.java:48)

Probably caused by regex being an internal language and calling context.initialize("regex") being forbidden.

Code snippet or code repository that reproduces the issue

Context.create().eval("regex", ".*");

Expected behavior

Mention that regex is internal language and it cannot be accessed via Context.eval

Additional context

https://graalvm.slack.com/archives/CNQSB2DHD/p1742625880472579?thread_ts=1742625833.674619&cid=CNQSB2DHD

[minamoto79]

When I have such issues with regex language usually issue caused with misconfigured classloaders, depending languages are loaded by service classloader it lookups for META-INF/services/com.oracle.truffle.api.provider.TruffleLanguageProvider or 'META-INF/services/com.oracle.truffle.api.TruffleLanguage$Provider` depending on version, you can add them manually in resources if your classloading is too complex :) Hope it helps.

[chumer]

I could not reproduce this with a regular Java embedding.
I fear something is off in your configuration. So I will need a reproducer from you.

[JaroslavTulach]

Put this into X.diff file:

$ git diff-tree -p 4b825dc642cb6eb9a060e54bf8d69288fbee4904 af1f12d78e173493ed5ec08d51910ba44973eda4
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..d55a388
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.apidesign.demo</groupId>
+    <artifactId>StarvationOfTruffle</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.release>21</maven.compiler.release>
+        <exec.mainClass>org.apidesign.demo.errormsg.ErrorMsg</exec.mainClass>
+        <graalvm.version>24.2.0</graalvm.version>
+        <exec.vmArgs>-ea</exec.vmArgs>
+        <exec.args>${exec.vmArgs} -classpath %classpath ${exec.mainClass} ${exec.appArgs}</exec.args>
+        <exec.appArgs>Hi Hello Hola Hey Ciao Ahoj</exec.appArgs>
+        <exec.executable>${java.home}/bin/java</exec.executable>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.graalvm.polyglot</groupId>
+            <artifactId>polyglot</artifactId>
+            <version>${graalvm.version}</version>
+            <scope></scope>
+        </dependency>
+        <dependency>
+            <groupId>org.graalvm.regex</groupId>
+            <artifactId>regex</artifactId>
+            <version>${graalvm.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>3.5.0</version>
+            </plugin>
+        </plugins>
+    </build>
+</project>
\ No newline at end of file
diff --git a/src/main/java/org/apidesign/demo/errormsg/ErrorMsg.java b/src/main/java/org/apidesign/demo/errormsg/ErrorMsg.java
new file mode 100644
index 0000000..0af6164
--- /dev/null
+++ b/src/main/java/org/apidesign/demo/errormsg/ErrorMsg.java
@@ -0,0 +1,13 @@
+package org.apidesign.demo.errormsg;
+
+import org.graalvm.polyglot.Context;
+
+public class ErrorMsg {
+
+    public static void main(String[] args) {
+        try (var ctx = Context.create("regex")) {
+            var regex = ctx.eval("regex", ".*[Hh].*");
+            System.out.println("value: " + regex);
+        }
+    }
+}

and then:

$ patch -p1 <X.diff
$ JAVA_HOME=~/bin/graalvm-community-openjdk-21+35.1/ mvn -q clean install exec:exec
Exception in thread "main" java.lang.IllegalArgumentException: A language with id 'regex' is not installed. Did you mean 'regex'? Installed languages are: [regex].
        at com.oracle.truffle.polyglot.PolyglotEngineException.illegalArgument(PolyglotEngineException.java:129)
        at com.oracle.truffle.polyglot.PolyglotEngineImpl.throwNotInstalled(PolyglotEngineImpl.java:1191)
        at com.oracle.truffle.polyglot.PolyglotEngineImpl.requireLanguage(PolyglotEngineImpl.java:1180)
        at com.oracle.truffle.polyglot.PolyglotContextImpl.requirePublicLanguage(PolyglotContextImpl.java:1915)
        at com.oracle.truffle.polyglot.PolyglotContextImpl.lookupLanguageContext(PolyglotContextImpl.java:1877)
        at com.oracle.truffle.polyglot.PolyglotContextImpl.eval(PolyglotContextImpl.java:1886)
        at com.oracle.truffle.polyglot.PolyglotContextDispatch.eval(PolyglotContextDispatch.java:62)
        at org.graalvm.polyglot.Context.eval(Context.java:416)
        at org.graalvm.polyglot.Context.eval(Context.java:446)
        at org.apidesign.demo.errormsg.ErrorMsg.main(ErrorMsg.java:9)

[chumer]

seems to be related to the usage of class-path.

[JaroslavTulach]

seems to be related to the usage of class-path.

• Possibly. I don't know.
• Are you using mostly module path mode? Is the error message nicer there?
• I'd say my usage of Maven is standard.
• People starting with Truffle from scratch are likely to end up with pom.xml like mine

[chumer]

There is nothing wrong with using the classpath. This should of course not happen. We also do test extensively with the class-path, so I am surprised this can make a difference.

[tzezula]

The issue is with the error message. The message shown for an internal language should differ from the one shown when the language is not installed.
#10966

[tzezula]

Fixed by ad09f80