BUG: Too many unnested loops incorrectly causes a C1061 compiler error in Visual Studio .NET (315481)

Microsoft Visual Studio .NET (2002), Professional Edition

Microsoft Visual Studio .NET (2002), Enterprise Architect Edition

Microsoft Visual Studio .NET (2002), Enterprise Developer Edition

Microsoft Visual Studio .NET (2002), Academic Edition

Microsoft Visual Studio .NET (2003), Enterprise Developer Edition

Microsoft Visual Studio .NET (2003), Academic Edition

Microsoft Visual Studio .NET (2003), Enterprise Architect Edition

Microsoft Visual Studio .NET (2003), Professional Edition

This article was previously published under Q315481

SYMPTOMS

If a function contains more than approximately 250 unnested loops, you receive the following error message, which should not appear in this scenario:

"fatal error C1061: compiler limit : blocks nested too deeply"

The problem occurs only when you compile the source code as a C++ source file. The source code compiles without errors when you compile the source code as a C source file.

STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

MORE INFORMATION

Steps to Reproduce the Behavior

The following sample code demonstrates the error:

/* Compile options needed: /TP /c
*/ 
#include <stdio.h>

// The code blocks in this function have only two nesting levels. 
// C1061 should not occur.
void func1()
{
	int a;
	int i = 0;
	int count = 0;

	count++;
	a = count;
	for (i=0; i<5; i++) {
		a += a*i;
	}
	printf("a=%d\n", a);

	// Copy and paste the following code 250 times.
	/*
	for (i=0; i<5; i++) {
		a += a*i;
	}
	printf("a=%d\n", a);
	*/ 

	count++;
	a = count;
	for (i=0; i<5; i++) {
		a += a*i;
	}
	printf("a=%d\n", a);
}

void main(){
	func1();
}

Modification Type:

Minor

Last Reviewed:

8/24/2005

Keywords:

kbvs2002sp1sweep kbbug kbCompiler kbpending KB315481