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digitalmars.D.bugs - [Issue 6599] New: Bus error with non-constant expression and struct initializer

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6599

           Summary: Bus error with non-constant expression and struct
                    initializer
           Product: D
           Version: D1 & D2
          Platform: Other
        OS/Version: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: doob me.com


--- Comment #0 from Jacob Carlborg <doob me.com> 2011-09-03 06:54:22 PDT ---
Compiling the following code results in a bus error:

class Orbit
{
    Repository repository = Repository();
}

struct Repository
{
    string fileProtocol = "file://";
    string source = fileProtocol ~ "/usr/local/orbit/repository";
}

void main () {}

DMD 1.069 and 2.054
Mac OS X 10.6.8

GDB session:

(gdb) r 
Starting program: /Users/doob/.dvm/compilers/dmd-1.069/bin/dmd test.d

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
0x000529b0 in InterfaceDeclaration::~InterfaceDeclaration ()
(gdb) bt
#0  0x000529b0 in InterfaceDeclaration::~InterfaceDeclaration ()
#1  0x000caef8 in TypeTypeof::~TypeTypeof ()
#2  0x000cac0d in TypeTypeof::~TypeTypeof ()
#3  0x000097b8 in StaticIfDeclaration::~StaticIfDeclaration ()
#4  0x0000a930 in StaticIfDeclaration::~StaticIfDeclaration ()
#5  0x00057aee in TemplateParameters::~TemplateParameters ()
#6  0x0002958b in ErrorExp::~ErrorExp ()
#7  0x000b9992 in StructInitializer::~StructInitializer ()
#8  0x000b72d8 in StructInitializer::~StructInitializer ()
#9  0x0000219f in ?? ()
#10 0x000020cd in ?? ()
(gdb)

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6599


yebblies <yebblies gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-invalid-code
                 CC|                            |yebblies gmail.com
           Platform|Other                       |All
            Summary|Bus error with non-constant |ICE(constfold.c) On use of
                   |expression and struct       |invalid expression as a
                   |initializer                 |compile-time initializer
         OS/Version|Mac OS X                    |All


--- Comment #1 from yebblies <yebblies gmail.com> 2011-09-06 14:10:39 EST ---
That's a strange place to get the error.  I get an AV at constfold.c:1396.

CatExp::optimize calls :optimize on fileProtocol (which does nothing) then
passes it along to Cat, which crashes trying to access fileProtocol's type.

It seems to happen for all operators:

class Orbit
{
    Repository repository = Repository();
}

struct Repository
{
    //int source = xx ~ xx;
    //int source = xx + xx;
    //int source = xx - xx;
    //int source = xx * xx;
    //int source = xx / xx;
    //int source = xx ^^ xx;
    //int source = xx & xx;
    int source = xx | xx;
}

void main () {}

It is probably invalid to assume e->type has been set inside Cat and other
constfold functions.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |clugdbug yahoo.com.au


--- Comment #2 from Don <clugdbug yahoo.com.au> 2011-09-07 00:04:01 PDT ---
(In reply to comment #1)

 That's a strange place to get the error.  I get an AV at constfold.c:1396.
 
 CatExp::optimize calls :optimize on fileProtocol (which does nothing) then
 passes it along to Cat, which crashes trying to access fileProtocol's type.
 
 It seems to happen for all operators:


[snip] 

 It is probably invalid to assume e->type has been set inside Cat and other
 constfold functions.


No, it's valid. Those functions should only be called after the semantic pass
was completed successfully on the expression. This is yet another gagging
system bug.

Repository is forward referenced from Orbit. Semantic is run on Repository with
errors gagged. This semantic pass fails, but leaves Repository's members in an
invalid state.
If you move Orbit after Repository, you see the correct error messages.

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--- Comment #3 from yebblies <yebblies gmail.com> 2011-09-07 17:32:53 EST ---
(In reply to comment #2)

 (In reply to comment #1)

 That's a strange place to get the error.  I get an AV at constfold.c:1396.
 
 CatExp::optimize calls :optimize on fileProtocol (which does nothing) then
 passes it along to Cat, which crashes trying to access fileProtocol's type.
 
 It seems to happen for all operators:


 [snip] 

 It is probably invalid to assume e->type has been set inside Cat and other
 constfold functions.


 
 No, it's valid. Those functions should only be called after the semantic pass
 was completed successfully on the expression. This is yet another gagging
 system bug.
 
 Repository is forward referenced from Orbit. Semantic is run on Repository with
 errors gagged. This semantic pass fails, but leaves Repository's members in an
 invalid state.
 If you move Orbit after Repository, you see the correct error messages.


Ok. That would make this another case of bug 4269?

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--- Comment #4 from Jacob Carlborg <doob me.com> 2011-09-07 09:26:43 PDT ---
With DMD 1.069 I get the same error even when I place Repository before Orbit.

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--- Comment #5 from Don <clugdbug yahoo.com.au> 2011-09-07 15:14:47 PDT ---
(In reply to comment #3)

 (In reply to comment #2)

 This is yet another gagging system bug.
 
 Repository is forward referenced from Orbit. Semantic is run on Repository with
 errors gagged. This semantic pass fails, but leaves Repository's members in an
 invalid state.
 If you move Orbit after Repository, you see the correct error messages.


 
 Ok. That would make this another case of bug 4269?


They have the same kind of structural cause in the compiler, but I think they
don't have any of the same code in common. It's definitely not a duplicate.

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prev sibling parent d-bugmail puremagic.com writes:
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Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla digitalmars.com
         Resolution|                            |FIXED


--- Comment #6 from Walter Bright <bugzilla digitalmars.com> 2011-09-20
13:16:58 PDT ---
https://github.com/D-Programming-Language/dmd/commit/6dc84fd7f2f43d28039d08bf80658cffc97e00f0

https://github.com/D-Programming-Language/dmd/commit/cf7a78423f426fb0d2d62b0af821129f1a4077a1

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