Backtrace, with a trunk r230746 debug build:

#​0 0x0000000807e1ea3a in thr_kill () from /lib/libc.so.7
#​1 0x0000000807e1e9a8 in raise () from /lib/libc.so.7
#​2 0x0000000807e1d109 in abort () from /lib/libc.so.7
#​3 0x0000000807dfddc1 in assert () from /lib/libc.so.7
#​4 0x000000000479bd64 in clang::Sema::ImplicitExceptionSpecification::CalledDecl (this=0x7fffffff5050, CallLoc=..., Method=0x808d6a120)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDeclCXX.cpp:210
#​5 0x00000000047c7847 in clang::Sema::ComputeDefaultedDtorExceptionSpec (
this=0x808cfa000, MD=0x808d6ad40)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDeclCXX.cpp:9302
#​6 0x00000000047b44e7 in computeImplicitExceptionSpec (S=..., Loc=...,
MD=0x808d6ad40)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDeclCXX.cpp:5137
#​7 0x00000000047b4362 in clang::Sema::EvaluateImplicitExceptionSpec (
this=0x808cfa000, Loc=..., MD=0x808d6ad40)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDeclCXX.cpp:5167
#​8 0x000000000488da21 in clang::Sema::ResolveExceptionSpec (this=0x808cfa000,
Loc=..., FPT=0x808d6adf0)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaExceptionSpec.cpp:160
#​9 0x000000000488f9e6 in clang::Sema::CheckExceptionSpecSubset (
this=0x808cfa000, DiagID=..., NoteID=..., Superset=0x808d6b6e0,
SuperLoc=..., Subset=0x808d6adf0, SubLoc=...)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaExceptionSpec.cpp:577
#​10 0x0000000004890e21 in clang::Sema::CheckOverridingFunctionExceptionSpec (
this=0x808cfa000, New=0x808d6ad40, Old=0x808cd1f00)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaExceptionSpec.cpp:832
#​11 0x00000000047b5dd2 in clang::Sema::CheckDelayedMemberExceptionSpecs (
this=0x808cfa000)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDeclCXX.cpp:5388
#​12 0x00000000047c70d9 in clang::Sema::ActOnFinishDelayedMemberInitializers (
this=0x808cfa000, D=0x808d6b4d0)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDeclCXX.cpp:8938
#​13 0x0000000004c93978 in clang::Sema::InstantiateClass (this=0x808cfa000,
PointOfInstantiation=..., Instantiation=0x808d6b4d0, Pattern=0x808d69290,
TemplateArgs=..., TSK=clang::TSK_ImplicitInstantiation, Complain=true)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaTemplateInstantiate.cpp:2095
#​14 0x0000000004c95ce1 in clang::Sema::InstantiateClassTemplateSpecialization (
this=0x808cfa000, PointOfInstantiation=..., ClassTemplateSpec=0x808d6b4d0,
TSK=clang::TSK_ImplicitInstantiation, Complain=true)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaTemplateInstantiate.cpp:2457
#​15 0x0000000004d3f16e in clang::Sema::RequireCompleteTypeImpl (
this=0x808cfa000, Loc=..., T=..., Diagnoser=...)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaType.cpp:5261
#​16 0x0000000004d3ea76 in clang::Sema::RequireCompleteType (this=0x808cfa000,
Loc=..., T=..., Diagnoser=...)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaType.cpp:5088
#​17 0x0000000004d355c2 in clang::Sema::RequireCompleteType (this=0x808cfa000,
Loc=..., T=..., DiagID=2150)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaType.cpp:5315
#​18 0x00000000047563d6 in clang::Sema::CheckFieldDecl (this=0x808cfa000,
Name=..., T=..., TInfo=0x808d6b648, Record=0x808d695a0, Loc=...,
Mutable=false, BitWidth=0x0, InitStyle=clang::ICIS_NoInit, TSSL=...,
AS=clang::AS_private, PrevDecl=0x0, D=0x7fffffff7d58)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDecl.cpp:12336
#​19 0x0000000004756131 in clang::Sema::HandleField (this=0x808cfa000,
S=0x808d36540, Record=0x808d695a0, DeclStart=..., D=..., BitWidth=0x0,
InitStyle=clang::ICIS_NoInit, AS=clang::AS_private)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDecl.cpp:12285
#​20 0x00000000047a6c2d in clang::Sema::ActOnCXXMemberDeclarator (
this=0x808cfa000, S=0x808d36540, AS=clang::AS_private, D=...,
TemplateParameterLists=..., BW=0x0, VS=..., InitStyle=clang::ICIS_NoInit)
at /share/dim/src/llvm/trunk/tools/clang/lib/Sema/SemaDeclCXX.cpp:2200
#​21 0x00000000043eabef in clang::Parser::ParseCXXClassMemberDeclaration (
this=0x808d26400, AS=clang::AS_private, AccessAttrs=0x0, TemplateInfo=...,
TemplateDiags=0x0)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/ParseDeclCXX.cpp:2438
#​22 0x00000000043e7cf3 in clang::Parser::ParseCXXMemberSpecification (
this=0x808d26400, RecordLoc=..., AttrFixitLoc=..., Attrs=..., TagType=18,
TagDecl=0x808d695a0)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/ParseDeclCXX.cpp:2877
#​23 0x00000000043e64e4 in clang::Parser::ParseClassSpecifier (
this=0x808d26400, TagTokKind=clang::tok::TokenKind::kw_class,
StartLoc=..., DS=..., TemplateInfo=..., AS=clang::AS_none,
EnteringContext=true, DSC=clang::Parser::DSC_top_level, Attributes=...)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/ParseDeclCXX.cpp:1712
#​24 0x00000000043c56c5 in clang::Parser::ParseDeclarationSpecifiers (
this=0x808d26400, DS=..., TemplateInfo=..., AS=clang::AS_none,
DSContext=clang::Parser::DSC_top_level, LateAttrs=0x0)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/ParseDecl.cpp:3231
#​25 0x00000000043af3b1 in clang::Parser::ParseDeclOrFunctionDefInternal (
this=0x808d26400, attrs=..., DS=..., AS=clang::AS_none)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/Parser.cpp:836
#​26 0x00000000043aeeb3 in clang::Parser::ParseDeclarationOrFunctionDefinition (
this=0x808d26400, attrs=..., DS=0x0, AS=clang::AS_none)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/Parser.cpp:909
#​27 0x00000000043ae54a in clang::Parser::ParseExternalDeclaration (
this=0x808d26400, attrs=..., DS=0x0)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/Parser.cpp:767
#​28 0x00000000043ad5bd in clang::Parser::ParseTopLevelDecl (this=0x808d26400,
Result=...)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/Parser.cpp:569
#​29 0x00000000043a68d3 in clang::ParseAST (S=..., PrintStats=false,
SkipFunctionBodies=false)
at /share/dim/src/llvm/trunk/tools/clang/lib/Parse/ParseAST.cpp:144
#​30 0x000000000309c92a in clang::ASTFrontendAction::ExecuteAction (
this=0x808c540f0)
at /share/dim/src/llvm/trunk/tools/clang/lib/Frontend/FrontendAction.cpp:537
#​31 0x00000000035561e0 in clang::CodeGenAction::ExecuteAction (
this=0x808c540f0)
at /share/dim/src/llvm/trunk/tools/clang/lib/CodeGen/CodeGenAction.cpp:733
#​32 0x000000000309baf0 in clang::FrontendAction::Execute (this=0x808c540f0)
at /share/dim/src/llvm/trunk/tools/clang/lib/Frontend/FrontendAction.cpp:439
#​33 0x000000000303ec30 in clang::CompilerInstance::ExecuteAction (
this=0x808c2d140, Act=...)
at /share/dim/src/llvm/trunk/tools/clang/lib/Frontend/CompilerInstance.cpp:806
#​34 0x000000000321b6fb in clang::ExecuteCompilerInvocation (Clang=0x808c2d140)
at /share/dim/src/llvm/trunk/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:222
#​35 0x000000000179a2be in cc1_main (Argv=...,
Argv0=0x7fffffffe538 "/home/dim/obj/llvm-230746-trunk-freebsd11-amd64-ninja-dbg-1/bin/clang-3.7",
MainAddr=0x178c6f0 <GetExecutablePath(char const*, bool)>)
at /share/dim/src/llvm/trunk/tools/clang/tools/driver/cc1_main.cpp:110
#​36 0x000000000178e4c9 in ExecuteCC1Tool (argv=..., Tool=...)
at /share/dim/src/llvm/trunk/tools/clang/tools/driver/driver.cpp:369
#​37 0x000000000178cc68 in main (argc=46, argv=0x7fffffffe140)
at /share/dim/src/llvm/trunk/tools/clang/tools/driver/driver.cpp:415

Let's continue this in bug 24000. The testcase here can also be used to demonstrate the problem.

*** This bug has been marked as a duplicate of bug llvm/llvm-bugzilla-archive#24000 ***

mentioned in issue llvm/llvm-bugzilla-archive#24000