Strange 'memset' error when using std.range.repeat and std.array.array

[via Digitalmars-d-learn]

Need some help)...
Having the following chunk of code:

string[] lines;
...
if( firstIndentStyle == IndentStyle.space )
{
	lines ~= " ".repeat.take(newIndentCount).array;
}
else //Tabs
{
	lines ~= "\t".repeat.take(newIndentCount).array; //This causes 
strange 'memset' error
}

This code fails with seg fault in memset. And I don't know why? 
here goes stack trace:

declarative [20930] [cores: 3]	
	Thread #1 [declarative] 20930 [core: 3] (Suspended : Signal : 
SIGSEGV:Segmentation fault)	
		gc.gc.Gcx.bigAlloc() at 0x4dbc73	
		gc.gc.GC.malloc() at 0x4d9375	
		gc_malloc() at 0x4cc308	
		core.memory.GC.malloc() at 0x4cbe64	
		std.array.__T14arrayAllocImplVbi0TAaTmZ.arrayAllocImpl() at 
array.d:628 0x4a1185	
		std.array.__T18uninitializedArrayTAaTmZ.uninitializedArray() at 
array.d:533 0x4a1155	
		std.array.__T5arrayTS3std5range43__T4TakeTS3std5range13__T6RepeatTaZ6RepeatZ4TakeZ.array() at array.d:119 0x4bc699	
		std.array.__T5arrayTS3std5range43__T4TakeTS3std5range13__T6RepeatTaZ6RepeatZ4TakeZ.array() at array.d:119 0x4bc5fb	
		declarative.parser.__T6ParserTS11declarative11lexer_tools76__T16TextForwardRangeTAyaVS11declarative6common14LocationConfigS5i1i1i1i1i1Z16TextForwardRangeZ.Parser.parseMixedBlockData() at parser.d:437 0x4c26e3	
		declarative.parser.__T6ParserTS11declarative11lexer_tools76__T16TextForwardRangeTAyaVS11declarative6common14LocationConfigS5i1i1i1i1i1Z16TextForwardRangeZ.Parser.parseMixedBlock() at parser.d:481 0x4c29fa	
		<...more frames...>	



Tried to reduce example into the folowing (and it is working!):

module bug_test;

import std.stdio;
import std.range;

void main()
{
	import std.array: array;
	
	string[] lines;
	
	size_t newIndentCount = 8;
	
	lines ~= ' '.repeat.take(newIndentCount).array;
	
	writeln( lines );
}

Could someone imagine why this could happen?))