[SR-7310] Xcode 9.3 fails to compile complex expressions (too complex) #49858
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Labels
bug
A deviation from expected or documented behavior. Also: expected but undesirable behavior.
compiler
The Swift compiler in itself
regression
standard library
Area: Standard library umbrella
swift 4.1
type checker
Area → compiler: Semantic analysis
Comments
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Comment by Volker Thieme (JIRA) Compilation fails even in playground. |
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Thanks for the report, Thieme (JIRA User)! We are working on trying to fix performance issues related to operator chaining. |
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Attachment: Download
Environment
macOS 10.13.4
Xcode 9.3
Additional Detail from JIRA
md5: 77ad85e7a0279c1678bd39d5a39797cc
Issue Description:
While the attached code fragment compiles fine in Xcode 9.2, compilation using Xcode 9.3 fails with the message:
expression was too complex to be solved in reasonable time; consider breaking up the expression into distinct sub-expressions
Example:
if df2 > 8.0 {{{ result.kurtosis = 3.0 + (12 * (pow(df2 - 2,2.0) * (df2 - 4) + df1 * (df1 + df2 - 2.0) * (5.0 * df2 - 22))) / (df1 * (df2 - 6) * (df2 - 8) * (df1 + df2 - 2))}}
{{}}}
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