| |
 | Posted by Jacob Carlborg |  Permalink Reply |
|
Jacob Carlborg 
| https://issues.dlang.org/show_bug.cgi?id=14966
--- Comment #2 from Jacob Carlborg <doob@me.com> ---
It's so obvious, that's why I didn't provide a test case. The content of the XML doesn't matter. I added a test case with a stack trace at the bottom.
I think the issue is that implementation of Document.opEquals:
override bool opEquals(Object o)
{
const doc = toType!(const Document)(o);
return
(prolog != doc.prolog ) ? false : (
(super != cast(const Element)doc) ? false : (
(epilog != doc.epilog ) ? false : (
true )));
}
I suspect the issue is the super call. I'm guessing since the implementation of ==/!= was changed to call object.opEquals, which then calls opEquals on the object. The object will be dynamically resolved to Document and then call Document.opEquals again, resulting in infinite recursion. I was planning to ask about this in the newsgroup if this is a regression but forgot about it.
Test case:
$ cat main.d
import std.xml;
void main()
{
auto xml = `
<?xml version="1.0" encoding="UTF-8"?>
<foo></foo>
`;
auto a = new Document(xml);
auto b = new Document(xml);
auto c = a == b;
}
$ dmd main.d && lldb main
(lldb) target create "main"
Current executable set to 'main' (x86_64).
(lldb) r
Process 68379 launched: '/Users/jacob/development/d/main' (x86_64)
Process 68379 stopped
* thread #1: tid = 0x4ad39f, 0x00000001000156f4 main`_d_isbaseof2 + 8, queue =
'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=2,
address=0x7fff5f3fffa8)
frame #0: 0x00000001000156f4 main`_d_isbaseof2 + 8
main`_d_isbaseof2:
-> 0x1000156f4 <+8>: pushq %rbx
0x1000156f5 <+9>: pushq %r12
0x1000156f7 <+11>: pushq %r13
0x1000156f9 <+13>: pushq %r14
(lldb) bt
* thread #1: tid = 0x4ad39f, 0x00000001000156f4 main`_d_isbaseof2 + 8, queue =
'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=2,
address=0x7fff5f3fffa8)
* frame #0: 0x00000001000156f4 main`_d_isbaseof2 + 8
frame #1: 0x00000001000156d1 main`_d_dynamic_cast + 45
frame #2: 0x00000001000361b8
main`D3std3xml31__T6toTypeTxC3std3xml8DocumentZ6toTypeFC6ObjectZxC3std3xml8Document
+ 20
frame #3: 0x00000001000322f9 main`D3std3xml8Document8opEqualsMxFC6ObjectZb
+ 21
frame #4: 0x0000000100001a59 main`D6object8opEqualsFC6ObjectC6ObjectZb +
109
frame #5: 0x00000001000019e5 main`D6object8opEqualsFxC6ObjectxC6ObjectZb +
13
frame #6: 0x0000000100032334 main`D3std3xml8Document8opEqualsMxFC6ObjectZb
+ 80
frame #7: 0x0000000100001a59 main`D6object8opEqualsFC6ObjectC6ObjectZb +
109
frame #8: 0x00000001000019e5 main`D6object8opEqualsFxC6ObjectxC6ObjectZb +
13
frame #9: 0x0000000100032334 main`D3std3xml8Document8opEqualsMxFC6ObjectZb
+ 80
frame #10: 0x0000000100001a59 main`D6object8opEqualsFC6ObjectC6ObjectZb +
109
.
.
.
frame #196537: 0x0000000100001a59 main`D6object8opEqualsFC6ObjectC6ObjectZb
+ 109
frame #196538: 0x0000000100001236 main`_Dmain + 102
frame #196539: 0x0000000100016b1c
main`D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv + 40
frame #196540: 0x0000000100016a61
main`D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFMDFZvZv + 45
frame #196541: 0x0000000100016ac1
main`D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZv + 45
frame #196542: 0x0000000100016a61
main`D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFMDFZvZv + 45
frame #196543: 0x00000001000169d4 main`_d_run_main + 504
frame #196544: 0x0000000100001254 main`main + 20
frame #196545: 0x00007fff9a0295c9 libdyld.dylib`start + 1
frame #196546: 0x00007fff9a0295c9 libdyld.dylib`start + 1
(lldb)
--
|
