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moparisthebest 1ce57efb12 Initial commit with full minimal test case
2017-07-10 23:24:42 -04:00
ParameterPrintingProcessor.java Initial commit with full minimal test case 2017-07-10 23:24:42 -04:00
Person.java Initial commit with full minimal test case 2017-07-10 23:24:42 -04:00
PersonDao.java Initial commit with full minimal test case 2017-07-10 23:24:42 -04:00
readme.md Initial commit with full minimal test case 2017-07-10 23:24:42 -04:00
show_bug.sh Initial commit with full minimal test case 2017-07-10 23:24:42 -04:00

readme.md

JDK-8184051 : jdk8 -parameters breaks annotation processor parameter names

This is the test case showing the broken javac behavior reported in JDK-8184051

$ ./show_bug.sh
javac 1.8.0_131
these are the correct argument names, compiled with and without -parameters argument, compiling both classes in a single invocation:
warning: Person(long,java.util.Date,java.lang.String,java.lang.String): 'long personNo, java.util.Date birthDate, java.lang.String firstName, java.lang.String lastName'
warning: Person(long,java.util.Date,java.lang.String,java.lang.String): 'long personNo, java.util.Date birthDate, java.lang.String firstName, java.lang.String lastName'

this shows expected missing parameter names when compiled in 2 steps, like in the case of libraries or multiple module projects, without -parameters:
warning: Person(long,java.util.Date,java.lang.String,java.lang.String): 'long arg0, java.util.Date arg1, java.lang.String arg2, java.lang.String arg3'

and finally the bug, same two step compilation as above, but -parameters passed into first step, shows shifted/incorrect parameter names:
warning: Person(long,java.util.Date,java.lang.String,java.lang.String): 'long personNo, java.util.Date firstName, java.lang.String lastName, java.lang.String arg3'

This was discovered by Travis Burtrum on June 19th, 2017, when writing test cases for JdbcMapper

it looks like the bug currently doesn't affect javac 9b177:

javac 9
these are the correct argument names, compiled with and without -parameters argument, compiling both classes in a single invocation:
warning: Person(long,java.util.Date,java.lang.String,java.lang.String): 'long personNo, java.util.Date birthDate, java.lang.String firstName, java.lang.String lastName'
warning: Person(long,java.util.Date,java.lang.String,java.lang.String): 'long personNo, java.util.Date birthDate, java.lang.String firstName, java.lang.String lastName'

this shows expected missing parameter names when compiled in 2 steps, like in the case of libraries or multiple module projects, without -parameters:
warning: Person(long,java.util.Date,java.lang.String,java.lang.String): 'long arg0, java.util.Date arg1, java.lang.String arg2, java.lang.String arg3'

and finally the bug, same two step compilation as above, but -parameters passed into first step, shows shifted/incorrect parameter names:
warning: Person(long,java.util.Date,java.lang.String,java.lang.String): 'long personNo, java.util.Date birthDate, java.lang.String firstName, java.lang.String lastName'