A specification without a language version, in most cases, would be treated as a one that selects the toolchain of the current build.

Usage of _invalid_ instances of `JavaToolchainSpec` results in a build error since Gradle 8.0.


== Toolchains for tasks

Starting with Gradle 7.6, toolchain specifications that configure other properties without specifying the language version are considered _invalid_.
Invalid specifications are deprecated and will become build errors in Gradle 8.0.

See more details about toolchain configuration in the <<toolchains#sec:configuring_toolchain_specifications,user manual>>.