[NETBEANS-3655] NB-Javac linkage error with JDK 14, can't generate class file version 58.65535

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Information Provided
• Affects Version/s: 11.2
• Labels: jdk14 nbjavac

Environment

Product Version: Apache NetBeans IDE 11.2
Java: 14-ea; OpenJDK 64-Bit Server VM 14-ea+29-1384
Runtime: OpenJDK Runtime Environment 14-ea+29-1384
System: Mac OS X version 10.15.2 running on x86_64; UTF-8; en_US (nb)
User directory: /Users/stephen/Library/Application Support/NetBeans/11.2
Cache directory: /Users/stephen/Library/Caches/NetBeans/11.2

• Assignee: Unassigned
• Reporter: Stephen Bannasch
• Created: 31/Dec/19 21:50
• Updated: 03/Nov/20 15:49
• Resolved: 01/Jan/20 05:53

Description

Using NB 11.2 on macos 10.15.2 and am using JEP 354: Switch Expressions so am compiling with JDK 14.

openjdk 14-ea 2020-03-17
OpenJDK Runtime Environment (build 14-ea+29-1384)
OpenJDK 64-Bit Server VM (build 14-ea+29-1384, mixed mode, sharing)

 
Am also setting these additional compiler options in the NB project:

--enable-preview --source 14 -Xlint:unchecked -Xlint:preview

Installed nb-javac today to see if I could get "Compile on save" working.

With "Compile on save" disabled I need to manually build the project every time I want to test changes.

With "Compile on save" enabled I get this error when running the project.

Error: LinkageError occurred while loading main class GraphPanel.GraphDemo
	java.lang.UnsupportedClassVersionError: GraphPanel/GraphDemo (class file version 57.65535) was compiled with preview features that are unsupported. This version of the Java Runtime only recognizes preview features for class file version 58.65535
/Users/stephen/Library/Caches/NetBeans/11.2/executor-snippets/run.xml:111: The following error occurred while executing this line:
/Users/stephen/Library/Caches/NetBeans/11.2/executor-snippets/run.xml:68: Java returned: 1
BUILD FAILED (total time: 0 seconds)