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[SR-4907] Accessing NSNumber.objCType causes SIGSEGV: invalid address on Linux #3856

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norio-nomura opened this issue May 16, 2017 · 1 comment
Closed

[SR-4907] Accessing NSNumber.objCType causes SIGSEGV: invalid address on Linux #3856

norio-nomura opened this issue May 16, 2017 · 1 comment
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bug Foundation Linux

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@norio-nomura
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Previous ID SR-4907
Radar None
Original Reporter @norio-nomura
Type Bug
Status Resolved
Resolution Done
Environment

swift-4.0-DEVELOPMENT-SNAPSHOT-2017-05-15-a

Additional Detail from JIRA
Votes 0
Component/s Foundation
Labels Bug, Linux
Assignee None
Priority Medium

md5: 616cd578425c786df2207ddd8e7cd296

Issue Description:

Expected result:

import Foundation
String(UnicodeScalar(UInt8(NSNumber(value: Int(0)).objCType.pointee))) // "q"

Actual result:

$  docker run --privileged -it -v `pwd`:`pwd` -w `pwd` --rm norionomura/swift:4020170515a swift -I /usr/lib/swift/clang/include
Welcome to Swift version 4.0-dev (LLVM f175cad503, Clang 51f7aba0dc, Swift 79b6334dd8). Type :help for assistance.
  1> import Foundation 
  2. String(UnicodeScalar(UInt8(NSNumber(value: Int(0)).objCType.pointee))) // "q"
Execution interrupted. Enter code to recover and continue.
Enter LLDB commands to investigate (type :help for assistance.)
Process 10 stopped
* thread #​1, name = 'repl_swift', stop reason = signal SIGSEGV: invalid address (fault address: 0x69)
    frame #​0: 0x00007ffff7f7f0a4 $__lldb_expr2`main + 164
$__lldb_expr2`main:
->  0x7ffff7f7f0a4 <+164>: movb   (%r14), %al
    0x7ffff7f7f0a7 <+167>: movb   %al, -0x38(%rbp)
    0x7ffff7f7f0aa <+170>: movabsq $0x7ffff7d80288, %rdx     ; imm = 0x7FFFF7D80288 
    0x7ffff7f7f0b4 <+180>: movabsq $0x7ffff7d6dfa8, %rcx     ; imm = 0x7FFFF7D6DFA8 
Target 0: (repl_swift) stopped.
  3>
@norio-nomura
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Fixed by #1093

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
This issue was closed.
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@norio-nomura