[Issue 4826] cannot create associative array and compiler crash

2010-09-07 Thread d-bugmail 
http://d.puremagic.com/issues/show_bug.cgi?id=4826


Don clugd...@yahoo.com.au changed:

   What|Removed |Added

   Keywords||diagnostic


--- Comment #3 from Don clugd...@yahoo.com.au 2010-09-06 23:56:32 PDT ---
Reduced test case:
--
struct Struct4826 {}

void bug4826(T)(T[string] value) {}

void test4826()
{
bug4826(Struct4826());
}


This is closely related to bug 3996. The patch for bug 3996 removes the
segfault, leaving only a useless error message with no line number, followed by
a sensible error message with line number.

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[Issue 4826] cannot create associative array and compiler crash

2010-09-07 Thread d-bugmail 
http://d.puremagic.com/issues/show_bug.cgi?id=4826



--- Comment #4 from Don clugd...@yahoo.com.au 2010-09-07 00:04:26 PDT ---
Actually even with the patch for bug 3996, I found a test case which still
segfaults:

struct Struct4826 { }

void bug4826b(T)(int[int] value) {}

void test4826b()
{
bug4826b(Struct4826());
}

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[Issue 4826] cannot create associative array and compiler crash

2010-09-07 Thread d-bugmail 
http://d.puremagic.com/issues/show_bug.cgi?id=4826



--- Comment #5 from Don clugd...@yahoo.com.au 2010-09-07 13:47:50 PDT ---
The segfault should be turned into an ICE by adding an extra assert into
TypeAArray::getImpl(), in mtype.c 3967.

+assert(ti-inst || sc);
ti-semantic(sc);
ti-semantic2(sc);
ti-semantic3(sc);

The problem is, that the template instance needs a scope (sc), but the scope is
never set, so it remains NULL, causing a segfault when it is first used. I
don't know how to solve this. I'm not even sure of what the scope should be.

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[Issue 4826] cannot create associative array and compiler crash

2010-09-05 Thread d-bugmail 
http://d.puremagic.com/issues/show_bug.cgi?id=4826



--- Comment #1 from brian-sch...@cox.net 2010-09-05 19:29:53 PDT ---
Here's the code that fails:
The second opIndexAssign is written this way because of bug 2972.

module testcase;

struct SomeStruct
{
void opIndexAssign(T)(T[string] value, string key)
if(is(T : string) || is(T : int))
{
}

void opIndexAssign(T)(SomeStruct value, string key) if(is(T : SomeStruct))
{
}
}

void main(string[] args)
{
auto t = SomeStruct();
t[test] = [key: value, otherKey: otherValue];
auto k = SomeStruct();
t[fails] = k;
// Error: cannot create associative array T[string]
// Segmentation fault
}

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[Issue 4826] cannot create associative array and compiler crash

2010-09-05 Thread d-bugmail 
http://d.puremagic.com/issues/show_bug.cgi?id=4826



--- Comment #2 from brian-sch...@cox.net 2010-09-05 19:34:48 PDT ---
(In reply to comment #1)

That should have been:

void opIndexAssign(T)(T value, string key) if(is(T : SomeStruct))
{
}

But the error is the same either way. Bugzilla needs an edit button.

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