[Issue 18718] New: ICE in dmd/traits.d:417

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18718

          Issue ID: 18718
           Summary: ICE in dmd/traits.d:417
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: ice, ice-on-invalid-code
          Severity: critical
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: greensunny12 at gmail.com

Reduced example (from
https://forum.dlang.org/post/uulshsgxovbrrctvdbsz@forum.dlang.org)

---
struct World {
        mixin BuildStuff;
}

template BuildStuff() {
        static foreach(elem; __traits(allMembers, typeof(this))) {

        }
}
---

Stacktrace:

---
0x00005555558ba0eb in semanticTraits(TraitsExp*, Scope*) (e=0x0, sc=0x0) at
dmd/traits.d:417
417     extern (C++) Expression semanticTraits(TraitsExp e, Scope* sc)
#0  0x00005555558ba0eb in semanticTraits(TraitsExp*, Scope*) (e=0x0, sc=0x0) at
dmd/traits.d:417
#1  0x0000555555824dbd in ExpressionSemanticVisitor::visit(TraitsExp*)
(this=0x7fffff7ff238, e=0x7ffff6971ad0) at dmd/expressionsem.d:3791
#2  0x0000555555812c32 in TraitsExp::accept(Visitor*) (this=0x7ffff6971ad0,
v=0x7fffff7ff238) at dmd/expression.d:4743
#3  0x0000555555834f4f in expressionSemantic(Expression*, Scope*)
(e=0x7ffff6971ad0, sc=0x7ffff6857e40) at dmd/expressionsem.d:9367
#4  0x000055555578ec45 in
_D3dmd4cond13StaticForeach7prepareMFPSQBk6dscope5ScopeZv (this=0x7ffff69719e0,
sc=0x7ffff6857e40) at dmd/cond.d:385
#5  0x0000555555787714 in StaticForeachDeclaration::include(Scope*)
(this=0x7ffff6971940, sc=0x7ffff6857d10) at dmd/attrib.d:1083
#6  0x00005555557de39b in
_D3dmd7dsymbol12ScopeDsymbol8_foreachFPSQBm6dscope5ScopePSQCe4root5array__T5ArrayTCQDdQDc7DsymbolZQxMDFmQwZiPmZi
(pn=0x7fffff7ff3c8, dg=..., members=0x7ffff6971920, sc=0x7ffff6857d10) at
dmd/dsymbol.d:1666
#7  0x00005555557de3ef in
_D3dmd7dsymbol12ScopeDsymbol8_foreachFPSQBm6dscope5ScopePSQCe4root5array__T5ArrayTCQDdQDc7DsymbolZQxMDFmQwZiPmZi
(pn=0x0, dg=..., members=0x7ffff7e9f500, sc=0x7ffff6857d10) at
dmd/dsymbol.d:1668
#8  0x00005555558bc8c1 in semanticTraits(TraitsExp*, Scope*) (e=0x7ffff6971ad0,
sc=0x7ffff6857d10) at dmd/traits.d:1335
#9  0x0000555555824dbd in ExpressionSemanticVisitor::visit(TraitsExp*)
(this=0x7fffff7ffcc8, e=0x7ffff6971ad0) at dmd/expressionsem.d:3791
#10 0x0000555555812c32 in TraitsExp::accept(Visitor*) (this=0x7ffff6971ad0,
v=0x7fffff7ffcc8) at dmd/expression.d:4743
#11 0x0000555555834f4f in expressionSemantic(Expression*, Scope*)
(e=0x7ffff6971ad0, sc=0x7ffff6857d10) at dmd/expressionsem.d:9367
#12 0x000055555578ec45 in
_D3dmd4cond13StaticForeach7prepareMFPSQBk6dscope5ScopeZv (this=0x7ffff69719e0,
sc=0x7ffff6857d10) at dmd/cond.d:385
#13 0x0000555555787714 in StaticForeachDeclaration::include(Scope*)
(this=0x7ffff6971940, sc=0x7ffff6857be0) at dmd/attrib.d:1083
#14 0x00005555557de39b in
_D3dmd7dsymbol12ScopeDsymbol8_foreachFPSQBm6dscope5ScopePSQCe4root5array__T5ArrayTCQDdQDc7DsymbolZQxMDFmQwZiPmZi
(pn=0x7fffff7ffe58, dg=..., members=0x7ffff6971920, sc=0x7ffff6857be0) at
dmd/dsymbol.d:1666
#15 0x00005555557de3ef in
_D3dmd7dsymbol12ScopeDsymbol8_foreachFPSQBm6dscope5ScopePSQCe4root5array__T5ArrayTCQDdQDc7DsymbolZQxMDFmQwZiPmZi
(pn=0x0, dg=..., members=0x7ffff7e9f500, sc=0x7ffff6857be0) at
dmd/dsymbol.d:1668
---

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