testing weird cases that causes issues with xlang

...urces/regression/verification/xlang/invalid/Assert1.scala

...urces/regression/verification/xlang/invalid/Assert2.scala

...sources/regression/verification/xlang/valid/Assert1.scala

...sources/regression/verification/xlang/valid/Assert2.scala

...sources/regression/verification/xlang/valid/Assert3.scala

...ces/regression/verification/xlang/valid/Sequencing1.scala

...ces/regression/verification/xlang/valid/Sequencing2.scala

...ces/regression/verification/xlang/valid/Sequencing3.scala

...ces/regression/verification/xlang/valid/Sequencing4.scala

...ces/regression/verification/xlang/valid/Sequencing5.scala

...ces/regression/verification/xlang/valid/Sequencing6.scala

...ces/regression/verification/xlang/valid/Sequencing7.scala

...ces/regression/verification/xlang/valid/Sequencing8.scala