Multiple descriptions for fassert in gcc/d/lang.opt and gcc/java/lang.opt

[Zopolis0 <creatorsmithmdt@gmail.com>]

While trying to compile gcc with gcj re-added, it breaks on there being
multiple declarations of fassert in gcc/d/lang.opt and gcc/java/lang.opt.

options.cc:3241:2: error: #error Multiple different help strings for
fassert:
 3241 | #error Multiple different help strings for fassert:
      |  ^~~~~
options.cc:3242:2: error: ‘Generate’ was not declared in this scope
 3242 |  Generate code for assert contracts.
      |  ^~~~~~~~
options.cc:3242:11: error: expected ‘}’ before ‘code’
 3242 |  Generate code for assert contracts.

Given that both of these definitions seem to be necessary, how do I resolve
this conflict?
gcc/java/lang.opt
fassert
Java Var(flag_assert) Init(1)
Permit the use of the assert keyword.gcc/d/lang.opt
fassert
D Var(flag_assert)
Generate code for assert contracts.