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[SR-7397] Compiler crashes if we add Words.Index == Int to BinaryInteger with Words : Collection #49940

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stephentyrone opened this issue Apr 10, 2018 · 6 comments
Closed

[SR-7397] Compiler crashes if we add Words.Index == Int to BinaryInteger with Words : Collection #49940

stephentyrone opened this issue Apr 10, 2018 · 6 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself crash Bug: A crash, i.e., an abnormal termination of software

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@stephentyrone
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Previous ID SR-7397
Radar rdar://problem/39316039
Original Reporter @stephentyrone
Type Bug
Status Resolved
Resolution Done

Attachment: Download

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

md5: eb0d5b061f10867e4f54c60bc5e0aa78

Issue Description:

If we apply the following change to Integers.swift.gyb:

@@ -1537,7 +1537,7 @@ public protocol BinaryInteger :
///
/// The `Words` type must conform to the `Collection` protocol with an
/// `Element` type of `UInt`.
- associatedtype Words : Sequence where Words.Element == UInt
+ associatedtype Words : Collection where Words.Element == UInt, Words.Index == Int

/// A collection containing the words of this value's binary
/// representation, in order from the least significant to most significant.

then swiftc crashes:

Assertion failed: (Val && "isa<> used on a null pointer"), function doit, file /Users/styrone/Checkouts/swift-source/llvm/include/llvm/Support/Casting.h, line 106.
@stephentyrone
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crash dump attached; this was built with -R, I'll attach another log with a debug build once it finishes.

@belkadan
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@swift-ci create

@belkadan
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Crash in the generic signature builder,

2. While resolving type Unicode._ParsingIterator at [/Users/styrone/Checkouts/swift-source/swift/stdlib/public/core/UnicodeParser.swift:125:11 - line:125:19] RangeText="Unicode.=_"

3. While validating '_ParsingIterator' at /Users/styrone/Checkouts/swift-source/swift/stdlib/public/core/UnicodeParser.swift:110:3

4. While validating '_UnicodeEncoding' at /Users/styrone/Checkouts/swift-source/swift/stdlib/public/core/UnicodeEncoding.swift:13:8

…huh.

@huonw
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huonw mannequin commented Apr 12, 2018

#15893

@huonw
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Mannequin

huonw mannequin commented Apr 12, 2018

Merged as 32b2cfc

@AnnaZaks
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AnnaZaks mannequin commented Jul 26, 2018

@stephentyrone, Could you verify if the problem is fixed and if so move the JIRA to "Closed"?
Thanks!
Anna

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added the crash Bug: A crash, i.e., an abnormal termination of software label Dec 12, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself crash Bug: A crash, i.e., an abnormal termination of software
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@stephentyrone @belkadan @AnthonyLatsis