Bug 15030 – [REG2.068.1] ICE with recursive delegate, -unittest, and std.range

cat > modA.d << CODE import std.range; CODE cat > modB.d << CODE unittest { import std.algorithm; import std.range; auto dg = (int[] delegate(int[]) self) => (int[] arr) => arr ? self(arr.filter!(a => a).array) : null; } CODE dmd -unittest -c modA.d modB.d ---- dmd: glue.c:1060: void FuncDeclaration_toObjFile(FuncDeclaration*, bool): Assertion `!v->csym' failed. ----

Digger points this back to https://github.com/D-Programming-Language/dmd/pull/4944.

Commits pushed to stable at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/d96a64973467d54a91693f87511da7289d1e1b71 fix Issue 15030 - ICE with recursive delegate, -unittest, and std.range Refer the detailed explanation in `test/runnable/ice15030.d`. https://github.com/D-Programming-Language/dmd/commit/ea5d85af7abf0b1e36fd42a8d98fd692a765dea0 Merge pull request #5058 from 9rnsr/fix15030 [REG2.068.1] Issue 15030 - ICE with recursive delegate, -unittest, and std.range

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/d96a64973467d54a91693f87511da7289d1e1b71 fix Issue 15030 - ICE with recursive delegate, -unittest, and std.range https://github.com/D-Programming-Language/dmd/commit/ea5d85af7abf0b1e36fd42a8d98fd692a765dea0 Merge pull request #5058 from 9rnsr/fix15030

*** Issue 15034 has been marked as a duplicate of this issue. ***

After a minor update, forum.dlang.org displayed a blank page as the index page today for a few minutes. For some reason, the group information array was empty after startup. The problem manifested only with 2.068.1, and not 2.067.1 or 2.068.2. I bisected the fix and DMD PR #5058 seems to have fixed it... thus, it's possible that this issue can also manifest as a wrong-code bug. If anyone is interested I could try to debug this further and produce a test case.