Bug 21678 – "_d_arraysetlengthT is not callable using argument types" on chained array length assignment

I don't know D but I hope that this is the minimal reproducer: martind@sirius:~/tmp/D147043$ cat D147043.d auto F() { int[] f; int[] a; a.length = f.length = 0; } martind@sirius:~/tmp/D147043$ That compiles OK with: martind@sirius:~/tmp/D147043$ dmd --version DMD64 D Compiler v2.094.2 Copyright (C) 1999-2020 by The D Language Foundation, All Rights Reserved written by Walter Bright martind@sirius:~/tmp/D147043$ dmd -w -c D147043.d martind@sirius:~/tmp/D147043$ But not with v2.095.0 (I claim but don't show here) or the latest release at the time of writing: martind@sirius:~/tmp/D147043$ dmd --version DMD64 D Compiler v2.095.1 Copyright (C) 1999-2020 by The D Language Foundation, All Rights Reserved written by Walter Bright martind@sirius:~/tmp/D147043$ dmd -w -c D147043.d D147043.d(4): Error: function core.internal.array.capacity._d_arraysetlengthTImpl!(int[], int)._d_arraysetlengthT(return ref scope int[] arr, ulong newlength) is not callable using argument types (int[], int[]) D147043.d(4): cannot pass argument f = f[0..0] of type int[] to parameter ulong newlength martind@sirius:~/tmp/D147043$ Google suggests that this has been seen in the wild in two projects.

Introduced by https://github.com/dlang/dmd/pull/11912

@BorisCarvajal created dlang/dmd pull request #12249 "Fix Issue 21678 - "_d_arraysetlengthT is not callable using argument …" fixing this issue: - Fix Issue 21678 - "_d_arraysetlengthT is not callable using argument types" on chained array length assignment https://github.com/dlang/dmd/pull/12249

dlang/dmd pull request #12249 "Fix Issue 21678 - "_d_arraysetlengthT is not callable using argument …" was merged into stable: - 3042fa9120f9b112e9639ea449f3ea09bb66330a by Boris Carvajal: Fix Issue 21678 - "_d_arraysetlengthT is not callable using argument types" on chained array length assignment https://github.com/dlang/dmd/pull/12249

dlang/dmd pull request #12273 "Merge stable" was merged into master: - abddd57f0c07c889325ecb5fa1cf2274a802afbc by Boris Carvajal: Fix Issue 21678 - "_d_arraysetlengthT is not callable using argument types" on chained array length assignment https://github.com/dlang/dmd/pull/12273