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digitalmars.D.bugs - [Issue 7056] New: weird segfault in std.conv.to

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=7056

           Summary: weird segfault in std.conv.to
           Product: D
           Version: D1 & D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: wrong-code
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: mrmocool gmx.de



import std.conv;
import std.math;

void main()
{
    import std.stdio;
    vec3 w = vec3();
    writefln("%f w: %f", 3.5f, w.length);
}

struct Vector(T, int dim)
{
    union
    {
        struct
        {
            T x = 0;
            T y = 0;
            T z = 0;
        }
        T[dim] cell;
    }

    string toString()     {
        return to!string(cell);
    }

    /// return length*length
     property T sqLength()
    {
        return cast()x * x + y * y + z * z;
    }

    /// return the vector length
     property T length()     {
        toString;
        auto ret = sqLength;
        return sqrt(ret);
    }

}

alias Vector!(float, 3)    vec3;


$ dmd -debug -gc vector.d && gdb --batch -ex 'run' -ex 'bt 15' ./vector
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7669faa in snprintf () from /lib/x86_64-linux-gnu/libc.so.6


std.format.formatValue!(std.array.Appender!(immutable(char)[]).Appender, float,
char).formatValue(std.array.Appender!(immutable(char)[]).Appender, float, ref
std.format.FormatSpec!(char).FormatSpec) (f=0x7fffffffdcd8, obj=0, w=...) at
/home/trass3r/coding/dmd/linux/bin64/../../src/phobos/std/format.d:1204

std.format.formatElement!(std.array.Appender!(immutable(char)[]).Appender,
float, char).formatElement(std.array.Appender!(immutable(char)[]).Appender,
float, ref std.format.FormatSpec!(char).FormatSpec) (f=0x7fffffffdcd8, val=0,
w=...) at
/home/trass3r/coding/dmd/linux/bin64/../../src/phobos/std/format.d:1596

std.format.formatRange!(std.array.Appender!(immutable(char)[]).Appender,
float[], char).formatRange(std.array.Appender!(immutable(char)[]).Appender,
float[], ref std.format.FormatSpec!(char).FormatSpec) (f=0x7fffffffdcd8,
val=0x00007fffffffdd780000000000000003, w=...) at
/home/trass3r/coding/dmd/linux/bin64/../../src/phobos/std/format.d:1452

std.format.formatValue!(std.array.Appender!(immutable(char)[]).Appender,
float[], char).formatValue(std.array.Appender!(immutable(char)[]).Appender,
float[], ref std.format.FormatSpec!(char).FormatSpec) (f=0x7fffffffdcd8,
val=0x00007fffffffdd780000000000000003, w=...) at
/home/trass3r/coding/dmd/linux/bin64/../../src/phobos/std/format.d:1386

float[]).toStr(float[]) (src=0x00007fffffffdd780000000000000003) at
/home/trass3r/coding/dmd/linux/bin64/../../src/phobos/std/conv.d:94

float[]).toImpl(float[]) (s=0x00007fffffffdd780000000000000003) at
/home/trass3r/coding/dmd/linux/bin64/../../src/phobos/std/conv.d:803

float[3]).toImpl(ref float[3]) (s=0x7fffffffdd78) at
/home/trass3r/coding/dmd/linux/bin64/../../src/phobos/std/conv.d:353

std.conv.to!(immutable(char)[]).to!(float[3]).to(float[3]) (_param_0=...) at
/home/trass3r/coding/dmd/linux/bin64/../../src/phobos/std/conv.d:237

3).Vector.toString() (this=0x7fffffffde10) at vector.d:25

3).Vector.length() (this=0x7fffffffde10) at vector.d:36

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Dec 02 2011
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=7056


hsteoh quickfur.ath.cx changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hsteoh quickfur.ath.cx



I can't reproduce this bug in git HEAD
(1a6da16ef112e03607574758b722698f2950b0de) running on Linux/64. Could you check
to see if it still occurs either in the latest release or in git HEAD? Since
it's been a while, the bug may have been fixed already.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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Maxim Fomin <maxim maxim-fomin.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |maxim maxim-fomin.ru
         Resolution|                            |WORKSFORME


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prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=7056




It's probably a good idea to add this code to a unittest in std.conv, to
prevent regressions in the future.

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