org.slf4j.LoggerFactory.getLogger fails with java.lang.NoClassDefFoundError: org/slf4j/spi/LoggingEventAware after upgrading to 2.6.0

[tyilo]

Describe the bug
After upgrading from tinylog 2.5.0 to 2.6.0 calling org.slf4j.LoggerFactory.getLogger("test") causes the following exception:

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/spi/LoggingEventAware
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	at org.tinylog.slf4j.TinylogLoggerFactory.getLogger(TinylogLoggerFactory.java:37)
	at org.tinylog.slf4j.TinylogLoggerFactory.getLogger(TinylogLoggerFactory.java:24)
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:363)
	at org.example.Main.main(Main.java:8)
Caused by: java.lang.ClassNotFoundException: org.slf4j.spi.LoggingEventAware
	at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	... 16 more

To Reproduce
Steps to reproduce the behavior:

1. Create a new maven project with the following files:
   pom.xml:

<?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.example</groupId>
    <artifactId>tinylog-test</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <tinylog.version>2.5.0</tinylog.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.tinylog</groupId>
            <artifactId>tinylog-api</artifactId>
            <version>${tinylog.version}</version>
        </dependency>
        <dependency>
            <groupId>org.tinylog</groupId>
            <artifactId>tinylog-impl</artifactId>
            <version>${tinylog.version}</version>
        </dependency>
        <dependency>
            <groupId>org.tinylog</groupId>
            <artifactId>slf4j-tinylog</artifactId>
            <version>${tinylog.version}</version>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.36</version>
        </dependency>
    </dependencies>

</project>

src/main/java/org/example/Main.java:

package org.example;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Main {
  public static void main(String[] args) {
    Logger logger = LoggerFactory.getLogger("test");
    logger.info("Hello world!");
  }
}

2. Run it and see that it successfully logs "Hello world!".
3. Change tinylog.version from 2.5.0 to 2.6.0 in pom.xml.
4. Run it again and see that we now get the NoClassDefFoundError.

Environment
tinylog version: 2.6.0
Java version: 1.8.0_362

[pmwmedia]

Thank you for the well documented bug report! It really made it pleasant to reproduce and fix the bug.

[pmwmedia]

I have just released tinylog 2.6.1. Please let me know if the fix works for you!

[tyilo]

It works :) Thanks for the quick fix.