ProGuard Java Optimizer and Obfuscator / Bugs / #663 Unsupported class version number [53.0] (maximum 52.0, Java 1.8)

#663 Unsupported class version number [53.0] (maximum 52.0, Java 1.8)

Milestone: v5.3.3

Status: closed-fixed

Owner: nobody

Labels: None

Priority: High

Updated: 2019-12-05

Created: 2017-09-01

Creator: Gautam Saxena

Private: No

I got this bug when trying to use ProGard GUI. Help!

ProGuard, version 5.3.3
Reading program jar [C:\Users\labsite-guest\deepsearch.jar]
Can't read [C:\Users\labsite-guest\deepsearch.jar] (Can't process class [module-info.class] (Unsupported class version number [53.0] (maximum 52.0, Java 1.8)))

Discussion

Boris Petrov - 2017-09-04

This also bit me with the 2.9 release of Log4j:

https://blogs.apache.org/logging/entry/log4j-2-9-released

I think Java 9 support is the most pressing issue now as we cannot upgrade to it until ProGuard supports it. Is there any timeline on when this could be achieved?

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- Vincent Privat - 2017-09-12
  
  See discussion here: https://sourceforge.net/p/proguard/bugs/551/
  
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T. Neidhart - 2019-12-05

status: open --> closed-fixed

Priority: 3 --> High
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T. Neidhart - 2019-12-05

ProGuard 6.1 added support upto Java 12 which includes support for class files with version 53.0.

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Unsupported class version number [53.0] (maximum 52.0, Java 1.8)

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#663 Unsupported class version number [53.0] (maximum 52.0, Java 1.8)

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