Lambda expressions are allowed only at source level 1.8 or above Multi-catch parameters are not allowed for source level below 1.7 at net.minecraft.client.Minecraft.<init>(Minecraft.java:411) at net.minecraft.client.main.Main.main(Main.java:108) at Start.main(Start.java:7)

[brodycritchlow]

Lambda expressions are allowed only at source level 1.8 or above Multi-catch parameters are not allowed for source level below 1.7

at net.minecraft.client.Minecraft.<init>(Minecraft.java:411)
at net.minecraft.client.main.Main.main(Main.java:108)
at Start.main(Start.java:7)

[OxideWaveLength]

You have to set the Java version to 1.8 (Java 8) or higher. Open Eclipse, right click the project, hover on "Build Path" and click on "Configure Build Path..."; click on "Libraries", double click on "JRE System Library" and set the "Execution environment" to Java 1.8 It's not a bug within the base client or a bug at all, it has to do with some programming instructions used to write the base client that have been added in Java 8 and are therefore not supported in prior versions

[OxideWaveLength]

I will close the issue now; open it again if the issue isn't solved or if you need further assistance in applying the fix