Bug 11850 – [ICE] Problem with filter with signed-unsigned array comparison

import std.algorithm: filter; void main() { filter!(a => a < [0])([[0u]]); } DMD 2.065alpha gives the errors and then crashes: temp.d(3): Error: incompatible types for ((a) < ([0])): 'uint[]' and 'int[]' ...\dmd2\src\phobos\std\algorithm.d(1396): instantiated from here: FilterResult!(__lambda1, uint[][]) temp.d(3): instantiated from here: filter!(uint[][]) temp.d(3): Error: template instance temp.main.filter!((a) => a < [0]).filter!(uint[][]) error instantiating

This is git-head only regression, caused by: https://github.com/D-Programming-Language/dmd/pull/3020 Compiler fix: https://github.com/D-Programming-Language/dmd/pull/3034

Perhaps this is the same bug: void main() { import std.algorithm: map, filter; [[1]].filter!(a => a.map!q(x => x)); } temp.d(3): Error: undefined identifier q ...\dmd2\src\phobos\std\algorithm.d(1396): instantiated from here: FilterResult!(__lambda1, int[][]) temp.d(3): instantiated from here: filter!(int[][]) temp.d(3): Error: template instance temp.main.filter!((a) => a.map!q((x) => x)).filter!(int[][]) error instantiating

Fixed commit: https://github.com/D-Programming-Language/dmd/commit/24c1dff4856983533e813b89c1d8adf9492936d0