Swift: compiler hangs trying to derive a type from an arithmetic expression
| Originator: | t.nick.a | ||
| Number: | rdar://17569160 | Date Originated: | 06-Jul-2014 03:59 PM |
| Status: | Open | Resolved: | |
| Product: | Developer Tools | Product Version: | Xcode 6.0 (6A216f) |
| Classification: | Hang | Reproducible: | Always |
Summary:
There is an issue with compilation of fairly long arithmetic expressions. Code containing expressions up to 5 operands is compiled instantly, 6 or 7 takes like up to minute to compile, 8 takes few minutes, and 9 seems to take even more. Indexing also hangs in Xcode.
Important note: this only happens when a type should be derived from the expression.
Steps to Reproduce:
Create an empty project or a playground and enter this code:
let test = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9
Expected Results:
Code compiles fine, test is an Int constant with value of 45.
Actual Results:
Compilation hangs indefinitely.
Version:
Xcode 6.0 (6A216f), OS X 10.9.3 (13D65)
Notes:
The issue doesn't occur if the type is specified explicitly, i.e.:
let test: Int = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9
or:
func foobar(test: Int) { print(test) }
foobar(1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)
Configuration:
Tested in OSX 10.9.3 running on MacBook Pro, Late 2013.
Comments
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