Attached is a file from a project called PerfectLib that contains a dictionary
literal with 816 entries in it. On my system with exactly 559 entries (meaning
the last entry is "res") the file can be compiled, but with 560 or more it
crashes. It looks like the crash is an infinite loop, I see many entries like
this in the stack trace.
frame #3351: 0x000000000199e0fe
swift`tryTypeVariableBindings(cs=0x00007fffffff82e8, depth=12,
typeVar=0x0000000007edba58, bindings=ArrayRef<(anonymous
namespace)::PotentialBinding> @ 0x00007ffffffe00f8,
solutions=0x00007fffffff7660,
allowFreeTypeVariables=Disallow)::PotentialBinding>,
llvm::SmallVectorImpl<swift::constraints::Solution>&,
swift::FreeTypeVariableBinding) + 1294 at CSSolver.cpp:1078
frame #3352: 0x000000000199cdef
swift`swift::constraints::ConstraintSystem::solveSimplified(this=0x00007fffffff82e8,
solutions=0x00007fffffff7660, allowFreeTypeVariables=Disallow) + 879 at
CSSolver.cpp:1551
frame #3353: 0x000000000199b7c0
swift`swift::constraints::ConstraintSystem::solveRec(this=0x00007fffffff82e8,
solutions=0x00007fffffff7660, allowFreeTypeVariables=Disallow) + 608 at
CSSolver.cpp:1256
frame #3354: 0x000000000199e0fe
swift`tryTypeVariableBindings(cs=0x00007fffffff82e8, depth=11,
typeVar=0x0000000007eca470, bindings=ArrayRef<(anonymous
namespace)::PotentialBinding> @ 0x00007ffffffe1de8,
solutions=0x00007fffffff7660,
allowFreeTypeVariables=Disallow)::PotentialBinding>,
llvm::SmallVectorImpl<swift::constraints::Solution>&,
swift::FreeTypeVariableBinding) + 1294 at CSSolver.cpp:1078
frame #3355: 0x000000000199cdef
swift`swift::constraints::ConstraintSystem::solveSimplified(this=0x00007fffffff82e8,
solutions=0x00007fffffff7660, allowFreeTypeVariables=Disallow) + 879 at
CSSolver.cpp:1551
frame #3356: 0x000000000199b7c0
swift`swift::constraints::ConstraintSystem::solveRec(this=0x00007fffffff82e8,
solutions=0x00007fffffff7660, allowFreeTypeVariables=Disallow) + 608 at
CSSolver.cpp:1256
The bottom of the stack is
frame #3391: 0x00000000017d21d9
swift`swift::TypeChecker::solveForExpression(this=0x00007fffffff97e0,
expr=0x00007fffffff8fe0, dc=0x0000000007ead5c0, convertType=Type @
0x00007fffffff7518, allowFreeTypeVariables=Disallow,
listener=0x00007fffffff8f50, cs=0x00007fffffff82e8, viable=0x00007fffffff7660,
options=(Storage = 16)) + 665 at TypeCheckConstraints.cpp:1154
frame #3392: 0x00000000017d4ae7
swift`swift::TypeChecker::typeCheckExpression(this=0x00007fffffff97e0,
expr=0x00007fffffff8fe0, dc=0x0000000007ead5c0, convertType=Type @
0x00007fffffff8e48, convertTypePurpose=CTP_Unused, options=(Storage = 16),
listener=0x00007fffffff8f50) + 711 at TypeCheckConstraints.cpp:1304
frame #3393: 0x00000000017d61f5
swift`swift::TypeChecker::typeCheckBinding(this=0x00007fffffff97e0,
pattern=0x00007fffffff8fe8, initializer=0x00007fffffff8fe0,
DC=0x0000000007ead5c0) + 261 at TypeCheckConstraints.cpp:1624
frame #3394: 0x00000000017d64cd
swift`swift::TypeChecker::typeCheckPatternBinding(this=0x00007fffffff97e0,
PBD=0x0000000007ed3fe8, patternNumber=0) + 237 at TypeCheckConstraints.cpp:1674
frame #3395: 0x0000000001809eb1
swift`validatePatternBindingDecl(tc=0x00007fffffff97e0,
binding=0x0000000007ed3fe8, entryNumber=0) + 1025 at TypeCheckDecl.cpp:1214
frame #3396: 0x00000000018126b3 swift`(anonymous
namespace)::DeclChecker::visitPatternBindingDecl(this=0x00007fffffff93b0,
PBD=0x0000000007ed3fe8) + 83 at TypeCheckDecl.cpp:2842
frame #3397: 0x00000000018117ac swift`swift::ASTVisitor<(anonymous
namespace)::DeclChecker, void, void, void, void, void,
void>::visit(this=0x00007fffffff93b0, D=0x0000000007ed3fe8) + 140 at
DeclNodes.def:91
frame #3398: 0x00000000018076f7 swift`(anonymous
namespace)::DeclChecker::visit(this=0x00007fffffff93b0,
decl=0x0000000007ed3fe8) + 39 at TypeCheckDecl.cpp:2672
frame #3399: 0x0000000001807650
swift`swift::TypeChecker::typeCheckDecl(this=0x00007fffffff97e0,
D=0x0000000007ed3fe8, isFirstPass=false) + 160 at TypeCheckDecl.cpp:5561
frame #3400: 0x00000000018ca5ce swift`(anonymous
namespace)::StmtChecker::visitBraceStmt(this=0x00007fffffff9600,
BS=0x0000000007ed4038) + 1166 at TypeCheckStmt.cpp:1078
frame #3401: 0x00000000018c9f0b swift`swift::ASTVisitor<(anonymous
namespace)::StmtChecker, void, swift::Stmt*, void, void, void,
void>::visit(this=0x00007fffffff9600, S=0x0000000007ed4038) + 91 at
StmtNodes.def:43
frame #3402: 0x00000000018c99fa swift`bool (anonymous
namespace)::StmtChecker::typeCheckStmt<swift::BraceStmt>(this=0x00007fffffff9600,
S=0x00007fffffff9668) + 42 at TypeCheckStmt.cpp:325
frame #3403: 0x00000000018c98e4
swift`swift::TypeChecker::typeCheckTopLevelCodeDecl(this=0x00007fffffff97e0,
TLCD=0x0000000007ead590) + 132 at TypeCheckStmt.cpp:1405
frame #3404: 0x00000000017b1524
swift`swift::performTypeChecking(SF=0x0000000007ead380, TLC=0x00007fffffffa068,
Options=(Storage = 5), StartElem=0) + 900 at TypeChecker.cpp:585
frame #3405: 0x0000000001515e08
swift`swift::CompilerInstance::performSema(this=0x00007fffffffb680) + 5048 at
Frontend.cpp:464
frame #3406: 0x0000000000c5e42c
swift`performCompile(Instance=0x00007fffffffb680,
Invocation=0x00007fffffffb250, Args=ArrayRef<const char *> @
0x00007fffffffad50, ReturnValue=0x00007fffffffaf34) + 1500 at
frontend_main.cpp:666
frame #3407: 0x0000000000c5da75 swift`frontend_main(Args=ArrayRef<const
char *> @ 0x00007fffffffc188,
Argv0="/home/jon/tmp/swift/swift/install/bin/swift",
MainAddr=0x0000000000c4c010) + 2981 at frontend_main.cpp:1117
frame #3408: 0x0000000000c4cc3e swift`main(argc_=10,
argv_=0x00007fffffffdba8) + 3054 at driver.cpp:156
frame #3409: 0x00007ffff6375ec5
libc.so.6`__libc_start_main(main=(swift`main at driver.cpp:107), argc=10,
argv=0x00007fffffffdba8, init=<unavailable>, fini=<unavailable>,
rtld_fini=<unavailable>, stack_end=0x00007fffffffdb98) + 245 at libc-start.c:287
frame #3410: 0x0000000000c4bf44 swift`_start + 41
This crash is on linux using swift 2.2 @ c9e72b3a9290a78d. I haven't tried the
swift-2.2-RELEASE tag, but it will probably have the same behavior as my
current git checkout is pretty close (in terms of commits) to the release tag.
Curiously on osx the native swift binary does not have a problem with this file.
My own code built on top of the swift codebase on osx does crash, however. I am
currently investigating what differences there are between how I invoke the
swift type checker and how the native swiftc does it.
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