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Issue 6749 - [CTFE] problem with array of structs
Summary: [CTFE] problem with array of structs
Status: RESOLVED FIXED
Alias: None
Product: D
Classification: Unclassified
Component: dmd (show other issues)
Version: D2
Hardware: All All
: P2 normal
Assignee: No Owner
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-09-30 13:00 UTC by Dmitry Olshansky
Modified: 2011-10-01 14:14 UTC (History)
2 users (show)

See Also:

Attachments
failing test (2.05 KB, application/octet-stream)
2011-09-30 13:01 UTC, Dmitry Olshansky 		Details
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Description Dmitry Olshansky 2011-09-30 13:00:03 UTC 
Actually I'm not sure what's at fault here but at least I have a test case on R-T vs C-T behavior. Reduced from FReD static regex codegen, so the test case is rather convulted.
Summarizing it: during CTFE I built an array of structs containing string.
Somehow at CTFE I manage to get string at index 0 with same content as at index 1. At run-time they are of course different. Maybe it has something to do with to!string.

Tested on 2.055 and 2.056head running on linux 64, results are the same.
Comment 1 Dmitry Olshansky 2011-09-30 13:01:11 UTC 
Created attachment 1029 [details]
failing test
Comment 2 Don 2011-09-30 22:29:06 UTC 
Reduced test case:

struct CtState {
    string code;
}

CtState bug6749()
{
    CtState[] pieces;
    CtState r = CtState("correct");
    pieces ~= r;   
    r = CtState("clobbered");    
    return pieces[0];
}
static assert(bug6749().code == "correct");

Looks like a problem with appending structs.