http://d.puremagic.com/issues/show_bug.cgi?id=6337
Summary: ICE when touching member variable of struct during
CTFE
Product: D
Version: D2
Platform: Other
OS/Version: Windows
Status: NEW
Severity: normal
Priority: P2
Component: DMD
AssignedTo: [email protected]
ReportedBy: [email protected]
--- Comment #0 from Johann MacDonagh <[email protected]> 2011-07-16
20:37:26 PDT ---
This one is weird. I narrowed it down to this test case, although I admit this
is still pretty long.
struct Test
{
string s;
this(string s)
{
this.s = s;
}
string ctfe()
{
dchar c = s[0];
if (test1(c))
{
for (c = next(c); test2(c); c = next(c))
{
}
}
return "ctfe";
}
dchar next(dchar curPeek)
{
if (curPeek != dchar.init)
{
s = s[1..$];
return s.length > 0 ? s[0] : dchar.init;
}
return dchar.init;
}
}
bool test1(dchar c)
{
return (c >= 'a' && c <= 'z' ||
c >= 'A' && c <= 'Z' ||
c == '_');
}
bool test2(dchar c)
{
return (test1(c) ||
c >= '0' && c <= '9' );
}
void main(string[] args)
{
// If this is auto then this executes just fine at runtime
enum x = Test("abc").ctfe();
}
This will ICE with an out of memory error. I believe it's going into an
infinite loop.
If you replace the body of test2 with "return false", then CTFE runs just fine.
This only happens on 2.054. On 2.053 (when you make appropriate modifications
to the test case) it crashes DMD.
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