Bug 24519 – compiler segfault on default argument with slice operator []

I Found that when i use the buildPath() as the only default argument in a class constructor it causes a segment fault in the compiler. --- import std.path; class A { this(string path = buildPath("a", "b")) { } } void main() { auto a = new A(); } --- $ dmd --version > DMD64 D Compiler v2.108.0 $ dmd comp_seq.d > fish: Job 1, 'dmd comp_seg.d' terminated by signal SIGSEGV (Address boundary error) $ dmd --version > DMD64 D Compiler v2.105.2 $ dmd comp_seq.d > # ok

The new code to resolve __FILE__ and __LINE__ in default arguments crashes when walking over a slice generated from a typesafe variadic function. Reduced example: ``` int buildPath(int[] paths...) { return 0; } void f(int path = buildPath(1, 2)) { } void g() { f(); } ```

It doesn't even require variadic arguments, it's just about the empty slice: ``` void f(string file = ""[]) { } void g() { f(); } ```

@dkorpel created dlang/dmd pull request #16408 "Fix Bugzilla 24519 - compiler segfault on default argument with slice…" fixing this issue: - Fix Bugzilla 24519 - compiler segfault on default argument with slice operator [] https://github.com/dlang/dmd/pull/16408

dlang/dmd pull request #16408 "Fix Bugzilla 24519 - compiler segfault on default argument with slice…" was merged into stable: - a652348f581e84a77e4f895f60ad834f288951b9 by Dennis Korpel: Fix Bugzilla 24519 - compiler segfault on default argument with slice operator [] https://github.com/dlang/dmd/pull/16408

dlang/dmd pull request #16409 "merge stable" was merged into master: - 6c501f3e5135602dbf0a8066fa3ff8bc6a4b90f6 by Dennis Korpel: Fix Bugzilla 24519 - compiler segfault on default argument with slice operator [] https://github.com/dlang/dmd/pull/16409