Bug 15713 – [REG-master] ctfe string concatenation is templates is broken

Created attachment 1584 dustmited source the attached code outputs random trash as error, but it outputs normal error in 2.070. the trash looks like: console1.d(8): Error: no property 'widthSignC▀╣ьY▀╣' for type 'Data' while with 2.070 it looks like: console1.d(8): Error: no property 'widthSign' for type 'Data' the offending commit (found with digger): https://github.com/D-Programming-Language/dmd/commit/7487e74378725791cc3d684581f8c4739a5932ae

Created attachment 1585 full code note that code is very sensitive to changes: removing empty and unused `wrWriteWidthChar()` from the top suddenly fixes it. also, i'm not sure if it can be reproduced on anything except my own system (GNU/Linux, x86, dmd built from scratch) due to this sensitiveness. but that's best i can get from dustmiting it. i attached the full source just in case it is unreproducible.

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/4852e48d1c0f5d0a2d7f4ccbebb463a86f264416 fix Issue 15713 - ctfe string concatenation is templates is broken https://github.com/D-Programming-Language/dmd/commit/e44c5bd360b910b66671ce492c7b7de17f05c108 Merge pull request #5474 from 9rnsr/fix15713 [REG-master] Issue 15713 - ctfe string concatenation is templates is broken