swift compiler error Float80

swift: /home/gigi/local/Source/apple/swift/lib/IRGen/StructLayout.cpp:357: void swift::irgen::StructLayoutBuilder::setAsBodyOfStruct(llvm::StructType *) const: Assertion `(!isFixedLayout() || IGM.DataLayout.getStructLayout(type)->getSizeInBytes() == CurSize.getValue()) && "LLVM size of fixed struct type does not match StructLayout size"' failed.
/home/gigi/local/Source/apple/build/Ninja-ReleaseAssert/swift-linux-i686/bin/swift[0xc335ea0]
Stack dump:
0.	Program arguments: /home/gigi/local/Source/apple/build/Ninja-ReleaseAssert/swift-linux-i686/bin/swift -frontend -c -filelist /tmp/sources-628097 -disable-objc-attr-requires-foundation-module -target i686-unknown-linux-gnu -disable-objc-interop -sdk / -I /home/gigi/local/Source/apple/build/Ninja-ReleaseAssert/swift-linux-i686/./lib/swift/linux/i686 -warn-swift3-objc-inference-complete -module-cache-path /home/gigi/local/Source/apple/build/Ninja-ReleaseAssert/swift-linux-i686/./module-cache -module-link-name swiftCore -nostdimport -parse-stdlib -resource-dir /home/gigi/local/Source/apple/build/Ninja-ReleaseAssert/swift-linux-i686/./lib/swift -swift-version 3 -O -D INTERNAL_CHECKS_ENABLED -group-info-path /home/gigi/local/Source/apple/swift/stdlib/public/core/GroupInfo.json -enable-sil-ownership -Xllvm -sil-inline-generics -Xllvm -sil-partial-specialization -Xcc -D__SWIFT_CURRENT_DYLIB=swiftCore -parse-as-library -module-name Swift -o /home/gigi/local/Source/apple/build/Ninja-ReleaseAssert/swift-linux-i686/stdlib/public/core/linux/i686/Swift.o
1.	While running pass #147 SILFunctionTransform "SIL alloc_stack Hoisting" on SILFunction "@_T0s7Float80V15_representationAB01_A14RepresentationVvg".
 for getter for _representation at /home/gigi/local/Source/apple/swift/stdlib/public/core/FloatingPointTypes.swift.gyb:342:16
2.	While converting type 'Float80' (declared at [/home/gigi/local/Source/apple/swift/stdlib/public/core/FloatingPointTypes.swift.gyb:74:8 - line:3662:1] RangeText="struct Float80 {
  public // @testable
  var _value: Builtin.FPIEEE80

  /// Creates a value initialized to zero.
  @_inlineable // FIXME(sil-serialize-all)
  @_transparent
  public init() {
    let zero: Int64 = 0
    self._value = Builtin.sitofp_Int64_FPIEEE80(zero._value)
  }

  @_inlineable // FIXME(sil-serialize-all)
  @_transparent
  public // @testable
  init(_bits v: Builtin.FPIEEE80) {
    self._value = v
  }
}")
<unknown>:0: error: unable to execute command: Aborted
<unknown>:0: error: compile command failed due to signal 6 (use -v to see invocation)
ninja: build stopped: subcommand failed.
/home/gigi/local/Source/apple/swift/utils/build-script: fatal error: command terminated with a non-zero exit status 1, aborting
gigi@gigi-VirtualBox:~$ ]