Import-Package headers should denote version by setting the version attribute
Currently the Import-Package headers of asm-analysis (asm-analysis.bnd), asm-commons
(asm-commons.bnd), asm-tree (asm-tree.bnd) and asm-util (asm-util.bnd) define the version
by using ':='.
Import-Package headers should set the version attribute by using a '=' (without a colon).
By using ':=' you are actually defining a custom directive instead of setting the existing
version attribute.
For example, the correct definition in asm-analysis.bnd would be
Import-Package: org.objectweb.asm.*;version="[${product.artifact},${product.artifact}]"