digitalmars.D.bugs - [Issue 24243] New: Can't format chain(filter, filter)
- d-bugmail puremagic.com (46/46) Nov 14 2023 https://issues.dlang.org/show_bug.cgi?id=24243
https://issues.dlang.org/show_bug.cgi?id=24243 Issue ID: 24243 Summary: Can't format chain(filter, filter) Product: D Version: D2 Hardware: x86_64 OS: Linux Status: NEW Severity: regression Priority: P1 Component: phobos Assignee: nobody puremagic.com Reporter: default_357-line yahoo.de module test; import std.algorithm; import std.range; import std.stdio; void main() { writefln!"%s"(chain([2].filter!"a", [3].filter!"a")); } And then phobos/std/algorithm/iteration.d(1396): Error: Attempting to fetch the front of an empty filter. phobos/std/range/package.d(1094): called from here: `this.__source_field_0.front()` phobos/std/range/package.d(1094): called from here: `fixRef(this.__source_field_0.front())` phobos/std/format/internal/write.d(1500): called from here: `val.front()` phobos/std/format/internal/write.d(1500): called from here: `formatElement(w, val.front(), f)` phobos/std/format/internal/write.d(2523): called from here: `formatRange(w, val, f)` phobos/std/format/write.d(1239): called from here: `formatValueImpl(w, val, f)` phobos/std/format/write.d(632): called from here: `formatValue(w, __param_2, spec)` phobos/std/format/package.d(741): called from here: `formattedWrite(NoOpSink(), "%s", Result(FilterResult(null, false), FilterResult(null, false), 0LU))` phobos/std/format/package.d(748): called from here: `(*function () pure nothrow safe => null)()` phobos/std/stdio.d(4473): Error: template instance `std.format.checkFormatException!("%s", Result)` error instantiating test.d(8): instantiated from here: `writefln!("%s", Result)` --
Nov 14 2023