ghc-iserv pattern match failure with no command line arguments
While trying to debug the issue in #11981 (closed)##12491 (closed) I found that that ghc-iserv executable run without any arguments fails with a pattern match failure:
$ inplace/lib/bin/ghc-iserv
ghc-iserv: user error (Pattern match failure in do expression at
iserv/src/Main.hs:28:3-18)Would be far nicer if it printed out an error message saying what arguments it expected, or how to run it to avoid this pattern match failure.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | GHCi |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | simonmar |
| Operating system | |
| Architecture |
