digitalmars.D.bugs - [Issue 2437] New: ICE - Assertion failure: default struct argument
- d-bugmail puremagic.com (33/33) Oct 31 2008 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (8/8) May 04 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (18/18) Sep 02 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (17/17) Sep 03 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (12/12) Oct 05 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (41/41) Apr 12 2010 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (37/37) Apr 14 2010 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (10/10) Apr 27 2010 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (6/6) Apr 27 2010 http://d.puremagic.com/issues/show_bug.cgi?id=2437
- d-bugmail puremagic.com (11/11) May 05 2010 http://d.puremagic.com/issues/show_bug.cgi?id=2437
http://d.puremagic.com/issues/show_bug.cgi?id=2437 Summary: ICE - Assertion failure: default struct argument Product: D Version: 2.019 Platform: PC OS/Version: Windows Status: NEW Keywords: ice-on-invalid-code, ice-on-valid-code Severity: normal Priority: P2 Component: DMD AssignedTo: bugzilla digitalmars.com ReportedBy: s.d.hammett googlemail.com Compiling the following code with 2.019, 2.020 struct aStruct{ int m_Int; this(int a){ m_Int = a; } } class aClass{ void aFunc(aStruct a = aStruct(44)){ } } int main(string argv[]) { aClass a = new aClass(); a.aFunc(); return 0; } Gives: ICE - Assertion failure: '!needThis()' on line 166 in file 'tocsym.c' Not sure if this code is valid or invalid. --
Oct 31 2008
http://d.puremagic.com/issues/show_bug.cgi?id=2437 clugdbug yahoo.com.au changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jlquinn optonline.net *** Bug 2440 has been marked as a duplicate of this bug. *** --
May 04 2009
http://d.puremagic.com/issues/show_bug.cgi?id=2437 The root cause is in func.c, FuncDeclaration::semantic(Scope *sc) Around line 240, we read: sd = parent->isStructDeclaration(); if (sd) { if (isCtorDeclaration()) { return; // <============== this is a problem! } Returning at this point means that the scope isn't saved. This prevents the later semantic passes from running, in certain cases. Commenting out the return prevents the ICE. I haven't yet checked this patch on the test suite, it could be that additional changes are required. But the problems begin here. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Sep 02 2009
http://d.puremagic.com/issues/show_bug.cgi?id=2437 Don <clugdbug yahoo.com.au> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords|patch | Aargh, patch is incorrect. I think the patch does fix a genuine problem (it seems to be necessary to allow you to evaluate a struct constructor in CTFE), but there's a second problem as well. It may be because a struct constructor such as aStruct(44) turns into ((aStruct __ctmp2;) , __ctmp2).this(44) And that __ctmp2 is a funny beast. Where is it stored? Its parent is the *MODULE*, not the function it's called from. But it's not a static variable. Weird. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Sep 03 2009
http://d.puremagic.com/issues/show_bug.cgi?id=2437 Rob Jacques <sandford jhu.edu> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sandford jhu.edu Now at line 170 in DMD 2.033. Note, this bug only applies to struct constructors and not default arguments using static opCall or opAssign. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Oct 05 2009
http://d.puremagic.com/issues/show_bug.cgi?id=2437 See also the closely related bug 2935. I can patch this (against svn 433) with these two changes (and the DMD test suite still passes), which basically just remove the checks, in the case where a CTFE variable is used. I'm not certain these patches are correct, though. -- PATCH ------------------------------------------ tocsym.c, line 170: Symbol *VarDeclaration::toSymbol() { //printf("VarDeclaration::toSymbol(%s)\n", toChars()); //if (needThis()) *(char*)0=0; + if (!isCTFE()) assert(!needThis()); and secondly, in e2ir.c, SymbolExp::toElem() line 664: //printf("SymbolExp::toElem('%s') %p\n", toChars(), this); //printf("\tparent = '%s'\n", var->parent ? var->parent->toChars() : "null"); - if (op == TOKvar && var->needThis()) + if (op == TOKvar && var->needThis() && !v->isCTFE()) { error("need 'this' to access member %s", toChars()); return el_long(TYint, 0); } --------------------------------- A totally different (and probably better) alternative would be to fix it in expression.c, around line 6770, when the temporary variable is created. If (!sc->func), it's being created in global scope, and should be neither in STCfield nor STCextern storage class. But I'm not sure how this should be done. // First look for constructor if (ad->ctor && arguments && arguments->dim) { // Create variable that will get constructed Identifier *idtmp = Lexer::uniqueId("__ctmp"); VarDeclaration *tmp = new VarDeclaration(loc, t1, idtmp, NULL); tmp->storage_class |= STCctfe; + if (!sc->func) { + // it's being created in global scope. Do something!! -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 12 2010
http://d.puremagic.com/issues/show_bug.cgi?id=2437 Don <clugdbug yahoo.com.au> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |patch The code I've previously posted is definitely incorrect. The problem here is that the compiler's thinks that the struct is a field of the parent; and this happens because the scope is wrong. I'm really not sure where to fix this. One possibility is to add it to CommaExp::semantic, creating a new scope whenever there's a declaration which isn't in module scope. But I think the correct solution is to change the scope for evaluating the default arguments, in mtype.c around line 4766; /* Create a scope for evaluating the default arguments for the parameters */ Scope *argsc = sc->push(); argsc->stc = 0; // don't inherit storage class argsc->protection = PROTpublic; + /* Compiler-generated comma expressions (such as struct constructors) + * can include a variable declaration. This declaration needs to go somewhere. + * If we're inside a function, it can become a local variable of that function; + * but if not (for example, if it is a function default parameter), it needs + * its own scope. + */ + if (!argsc->func) // not a nested function + argsc->parent = (Dsymbol*)sc->module; But I don't know if it's OK to set the parent in this way. The cast is needed only because mtype.c doesn't have the real definition of Module. The patch to bug 2935 is required in addition to this one. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 14 2010
http://d.puremagic.com/issues/show_bug.cgi?id=2437 Walter Bright <bugzilla digitalmars.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |bugzilla digitalmars.com 09:06:41 PDT --- I think the correct solution is identified in 2935. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 27 2010
http://d.puremagic.com/issues/show_bug.cgi?id=2437 11:37:19 PDT --- changeset 452 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 27 2010
http://d.puremagic.com/issues/show_bug.cgi?id=2437 Don <clugdbug yahoo.com.au> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED Fixed DMD2.044 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
May 05 2010