The current backend does that for some bridges. We do it consistently
for all bridges.
The line number used differs. For the JVM_IR backend, we use the
line number of the class to which the bridge is added. For the
JVM backend, that does not appear to be the case for bridges
in lambdas. I prefer the line number for a lambda invoke bridge
to be the line for the lambda instead os some surrounding class.
The difference is that JVM_IR generates line numbers for the
constructor field initialization.
In this case:
```
29: class B {
30: // comment
31: val bPropVal: Int,
32: // comment
33: var bProbVar: Int
34: ) {
```
the line numbers for the field initializations are 31 and 33 where
in the current backend the whole constructor has line number 29.
Mads Ager