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Posted By: Eric Bruneton
Date: 2018-03-11 10:25
Summary: ASM 6.1 released

The ASM 6.1 version has been released.

Besides a new V10 constant for Java 10 class files, there are no new features compared to 6.0. However, internally, a lot of changes have been made (see below; almost each line of code has changed).

Release notes:

- xml package deprecated
- project layout changed to Maven style
- build system changed from Ant to Gradle
- coding style changed to Google Java style
- code quality and readability improved a lot
- code quality tracked with SonarQube (
- performance improvements
- unit tests improved: migrated to JUnit 5, faster, coverage > 95%
- non-regression tests added for past issues
- benchmarks improved: now use JMH (
- new Gitlab Continuous Integration pipeline
- small bug fixes related to modules. See
- bug fixes:
* #317800: Resizing jump instruction adds invalid stack frame to a class without frames
* #317802: MethodRemapper.visitInvokeDynamicInsn mutates source bsmArgs
* #317804: Adjust CheckModuleAdapter so Module attribute in 54.0+ class file cannot contains a requires java.base with ACC_TRANSITIVE or ACC_STATIC_PHASE
* #317807: Asymmetry of ClassWriter for bytecode versions higher than the one that ClassReader accepts
* #317809: CheckMethodAdapter rejects valid Java and JVM identifiers with surrogate characters

Backward binary compatibility is preserved, but the behavior at runtime has changed in a few areas:
- ACC_SYNTHETIC flag vs Synthetic attribute, see
- numbering of synthetic parameters: see
- StringBuffer no longer used in util (Printer.buf deprecated, use stringBuilder instead)

Latest News
Joram 5.15 is released
    Andre Freyssinet - 2018-05-04 10:58
Joram 5.15 is released
    Andre Freyssinet - 2018-05-04 10:58
ASM 6.1 released
    Eric Bruneton - 2018-03-11 10:25
XWiki Release announcement moved
    Vincent Massol - 2018-02-26 16:34
ASM 6.1-beta released
    Eric Bruneton - 2018-01-06 15:03

Discussion Forums: ASM 6.1 released

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