Glad to announce the second beta for LDC 1.33. Major changes since beta1:

• New CLI option -femit-local-var-lifetime to enable stack memory reuse.
• C files are now automatically preprocessed using the external C compiler.
• Less pedantic checks for conflicting C(++) function declarations ('Error: Function type does not match previously declared function with the same mangled name').

Full release log and downloads: https://github.com/ldc-developers/ldc/releases/tag/v1.33.0-beta2

Please help test, and thanks to all contributors & sponsors!

On Sunday, 11 June 2023 at 02:06:31 UTC, kinke wrote:

For people testing this release, please enable this flag on your projects.

It is disabled by default because it enables aggressive optimizations which may uncover latent bugs in your code: use of variable after its scope has ended. An example:

void useAfterScope() {
  int* p;
  {
    int x = 0;
    p = &x;  // cannot statically disallow this because
    *p = 1;  // this is a valid use of things
  }
  *p = 5;  // but when you do this... stack use after scope bug!
}

Use of AddressSanitizer with -femit-local-var-lifetime would catch this bug.

cheers,
Johan