[SR-10786] Code that cause compiler crash

[swift-ci]

Previous ID	SR-10786
Radar	None
Original Reporter	chenyungui (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Attachment: Download

Environment

Swift 5.0

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug, CompilerCrash
Assignee	None
Priority	Medium

md5: a58d14a639a8226a48687083ce8cf06b

Issue Description:

Please run the CompilerCrash.playground, the code will cause compiler crash!

[belkadan]

Fixed in master!

<stdin>:16:58: error: cannot provide default value to inout parameter 'map'
    public func doSomething(b: B, map: inout [[Bool]]? = nil) {
                                                         ^

[belkadan]

You can test with a downloadable toolchain from https://swift.org/download