GHC 8.2.1 allows bang patterns in let-bindings without -XBangPatterns
Bang patterns occurring in let-bindings are allowed even if -XBangPatterns extension is not enabled.
-- Compile error in 8.0.2
-- Compiles in 8.2.1 and 8.2.2
main = print (let !x = 1 + 2 in x)
-- Compile error in all of 8.0.2, 8.2.1, and 8.2.2
main = print (let f !x !y = x + y in f 1 2)
Trac metadata
Trac field | Value |
---|---|
Version | 8.2.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |