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[SR-4326] lldb prints strange numbers when interpreting optional unsigned values #4393

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phausler opened this issue Mar 23, 2017 · 4 comments
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[SR-4326] lldb prints strange numbers when interpreting optional unsigned values #4393

phausler opened this issue Mar 23, 2017 · 4 comments
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bug Something isn't working LLDB for Swift

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@phausler
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Previous ID SR-4326
Radar None
Original Reporter @phausler
Type Bug
Status Resolved
Resolution Duplicate
Additional Detail from JIRA
Votes 0
Component/s LLDB for Swift
Labels Bug
Assignee jingham@apple.com (JIRA)
Priority Medium

md5: 4bf1f93b21119718ade2f1efa9d50ac5

duplicates:

  • SR-4091 Incorrect result shown in REPL for 'UInt8?'

Issue Description:

given the code `let v: UInt8? = 128`
issuing `p v` results in the following

(lldb) p v
(UInt8?) $R0 = -128

issuing `p v!` results in the following

(lldb) p v!
(UInt8) $R1 = 128

it seems that the top bit of the optional is being reinterpreted as memory of a Int16 instead?
@belkadan
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I thought this was fixed with SR-1007, but apparently not. cc jingham@apple.com (JIRA User)

@phausler
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It is worth noting this only applies to optional values and I have reasonably proven to myself that it is a lldb issue and not actually a swift issue (which would be quite scary if it was).

@swift-ci
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Comment by Jim Ingham (JIRA)

I don't think this is related to SR-1007. That was the data formatter for UInt8 doing the wrong thing, this is the data formatter for optionals doing the wrong thing.

@swift-ci
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Comment by Jim Ingham (JIRA)

This is the same issue, printing an optional of an unsigned type.

@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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bug Something isn't working LLDB for Swift
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@phausler @belkadan @swift-ci