http://d.puremagic.com/issues/show_bug.cgi?id=6108
Summary: Crash on inherited contract using overridden method in
unittest
Product: D
Version: D2
Platform: x86
OS/Version: Mac OS X
Status: NEW
Keywords: wrong-code
Severity: major
Priority: P2
Component: DMD
AssignedTo: nob...@puremagic.com
ReportedBy: c...@klickverbot.at
--- Comment #0 from klickverbot <c...@klickverbot.at> 2011-06-05 08:29:41 PDT
---
Consider the following piece of code:
---
class A {
bool isOpen() {
return false;
}
void read() in {
assert(isOpen);
} body {}
}
class B : A {
override bool isOpen() {
return foo_;
}
override void read() {}
bool foo_ = true;
}
void main() {}
unittest {
auto b = new B;
b.read();
}
---
Running the unittest with latest DMD (0ba8f0d) on OS X gives:
---
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000008
0x00000008 in ?? ()
(gdb) bt
#0 0x00000008 in ?? ()
Cannot access memory at address 0x8
#1 0x00001a0a in D4test1B4readMFZv ()
#2 0x00001a36 in D4test11__unittest1FZv ()
#3 0x00001973 in _D4test9__modtestFZv ()
#4 0x00008be9 in
D4core7runtime18runModuleUnitTestsUZb16__foreachbody255MFKPS6object10ModuleInfoZi
()
#5 0x00003f9b in D6object10ModuleInfo7opApplyFMDFKPS6object10ModuleInfoZiZi ()
#6 0x00008ada in runModuleUnitTests ()
#7 0x0001232e in D2rt6dmain24mainUiPPaZi6runAllMFZv ()
#8 0x00011ea5 in D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv ()
#9 0x00011e3f in main ()
---
Some observations:
- The segfault occurs in the read() in contract.
- It only occurs if the code is run in an unittest block.
- The problem seems to be accessing foo_ – if I change B.isOpen to »return
true;«, it works fine.
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