LDC 1.17.0-beta1

Big news

• Frontend, druntime and Phobos are at version 2.087.1+. (#3093, #3124)
  • The upstream fix wrt. local templates can now receive local symbols hasn't been ported yet. (#3125)
• LLVM for prebuilt packages upgraded to v8.0.1. (#3113)
• LLVM 8+: New intrinsics llvm_*_sat (saturation arithmetic) and llvm_{min,max}imum. Thanks Stefanos! (ldc-developers/druntime#161, ldc-developers/druntime#162)

Platform support

• Supports LLVM 3.9 - 8.0.

Bug fixes

• Fix for v1.16.0 regression when returning void expressions. (#3094, #3095)
• -lowmem (and on Windows, --DRT-* options) in response files (e.g., used by dub) aren't ignored anymore. (#3086)
• Windows: LDC and LDMD now internally use UTF-8 strings only, incl. command-line options and environment variables. The LDC install dir, source file names etc. can now contain non-ASCII chars. For proper console output, especially to stderr, you'll need Windows 10 v1809+ and may need to set a Unicode console font (e.g., Consolas). (#611, #3086)
• Android: Linker errors when building LDC/LDMD should be fixed. (#3128)
• Support for recent gdmd as D host compiler. Thanks Moritz! (#3087)
• Do not require gold plugin when linking with LLD. (#3105)
• Some JIT bind fixes. (#3099, #3100)

Known issues

• NEW: If you encounter segfaults in GC worker threads with shared druntime on Linux that are fixed by disabling new parallel GC marking (e.g., via --DRT-gcopt=parallel:0 in executable cmdline), please let us know about it: #3127
• Buggy older ld.bfd linker versions may wrongly strip out required symbols, e.g., ModuleInfos (so that e.g. no module ctors/dtors are run). LDC defaults to ld.gold on Linux.
• LDC does not zero the padding area of a real variable. This may lead to wrong results if the padding area is also considered. See #770. Does not apply to real members inside structs etc.