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digitalmars.D.learn - Strange 'memset' error when using std.range.repeat and std.array.array

reply Ur nuz <neuranuz gmail.com> writes:
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]	

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__T6RepeatTaZ6R
peatZ4TakeZ.array() at array.d:119 0x4bc699	
		std.array.__T5arrayTS3std5range43__T4TakeTS3std5range13__T6RepeatTaZ6R
peatZ4TakeZ.array() at array.d:119 0x4bc5fb	
		declarative.parser.__T6ParserTS11declarative11lexer_tools76__T16TextForwardRangeTAyaVS11declarative6common14LocationConfigS5i1i1i1i1i1Z16TextForwardRangeZ.Parser.p
rseMixedBlockData() at parser.d:437 0x4c26e3	
		declarative.parser.__T6ParserTS11declarative11lexer_tools76__T16TextForwardRangeTAyaVS11declarative6common14LocationConfigS5i1i1i1i1i1Z16TextForwardRangeZ.Pars
r.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?))
Jan 04 2016
parent reply Ur nuz <neuranuz gmail.com> writes:
Sorry, the actual code is:
...

lines ~= ' '.repeat.take(newIndentCount).array;

...with character quotes. But it still fails with error described 
in stack trace in Gcx.bigAlloc()
Jan 04 2016
parent reply tcak <1ltkrs+3wyh1ow7kzn1k sharklasers.com> writes:
On Monday, 4 January 2016 at 10:50:17 UTC, Ur nuz wrote:

 Sorry, the actual code is:
 ...

 lines ~= ' '.repeat.take(newIndentCount).array;

 ...with character quotes. But it still fails with error 
 described in stack trace in Gcx.bigAlloc()


What's your OS? On Linux x64, it works without any error.
Jan 04 2016
parent reply Ur nuz <neuranuz gmail.com> writes:
On Monday, 4 January 2016 at 12:00:32 UTC, tcak wrote:

 On Monday, 4 January 2016 at 10:50:17 UTC, Ur nuz wrote:

 Sorry, the actual code is:
 ...

 lines ~= ' '.repeat.take(newIndentCount).array;

 ...with character quotes. But it still fails with error 
 described in stack trace in Gcx.bigAlloc()


 What's your OS? On Linux x64, it works without any error.


Yes. It's Ubuntu 14. It works when it's in the separate example, 
but not working inside my project. The strange thing is that it 
working in another place inside the same application. So I don't 
know what to think about it. Maybe this problem occurs only when 
some amount of memori is being allocated or something..
Jan 04 2016
parent reply Marc =?UTF-8?B?U2Now7x0eg==?= <schuetzm gmx.net> writes:
On Monday, 4 January 2016 at 12:20:09 UTC, Ur nuz wrote:

 On Monday, 4 January 2016 at 12:00:32 UTC, tcak wrote:

 On Monday, 4 January 2016 at 10:50:17 UTC, Ur nuz wrote:

 Sorry, the actual code is:
 ...

 lines ~= ' '.repeat.take(newIndentCount).array;

 ...with character quotes. But it still fails with error 
 described in stack trace in Gcx.bigAlloc()


 What's your OS? On Linux x64, it works without any error.


 Yes. It's Ubuntu 14. It works when it's in the separate 
 example, but not working inside my project. The strange thing 
 is that it working in another place inside the same 
 application. So I don't know what to think about it. Maybe this 
 problem occurs only when some amount of memori is being 
 allocated or something..


What is the value of `newIndentCount` when this happens? Could it 
be it is too big, or negative?

If not, you could try reducing your program using dustmite:
https://github.com/CyberShadow/DustMite/wiki/Detecting-a-specific-segfault
Jan 04 2016
parent Ur nuz <neuranuz gmail.com> writes:
On Monday, 4 January 2016 at 14:25:30 UTC, Marc Schütz wrote:

 On Monday, 4 January 2016 at 12:20:09 UTC, Ur nuz wrote:

 On Monday, 4 January 2016 at 12:00:32 UTC, tcak wrote:

 [...]


 Yes. It's Ubuntu 14. It works when it's in the separate 
 example, but not working inside my project. The strange thing 
 is that it working in another place inside the same 
 application. So I don't know what to think about it. Maybe 
 this problem occurs only when some amount of memori is being 
 allocated or something..


 What is the value of `newIndentCount` when this happens? Could 
 it be it is too big, or negative?

 If not, you could try reducing your program using dustmite:
 https://github.com/CyberShadow/DustMite/wiki/Detecting-a-specific-segfault


The issue was trivial. I decreased variable with 0 value and got 
OutOfMemory error.
Jan 04 2016