#2991: .tix file generation broken with -fhpc and --make flags with lhs modules -------------------------------------+------------------------------------- Reporter: ppavel | Owner: andy@… Type: bug | Status: new Priority: lowest | Milestone: 7.10.1 Component: Code | Version: 6.10.1 Coverage | Keywords: hpc make lhs Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * failure: => None/Unknown Old description:

assume the project consisting of two files: !Main.lhs and !MyModule.hs. Main.lhs imports !MyModule via standard import. Build the project with

ghc --make -fhpc -o main Main.lhs

The generated .mix file contains relevant information and hpc markup correctly shows the coverage for !MyModule.

Now rename !MyModule.hs to !MyModule.lhs and enclose the code there in \begin{code} / \end{code}. Build again. The compilation still succeeds and the executable works fine. But !MyModule.mix now seems wrong and no hpc coverage information is available for !MyModule

New description: Assume the project consisting of two files: Main.lhs and MyModule.hs. Main.lhs imports MyModule via standard import. Build the project with ghc --make -fhpc -o main Main.lhs The generated .tix file contains relevant information and hpc markup correctly shows the coverage for MyModule. Now rename MyModule.hs to MyModule.lhs and enclose the code there in \begin{code} / \end{code}. Build again. The compilation still succeeds and the executable works fine. But main.tix now seems wrong and no hpc coverage information is available for MyModule -- Comment: I can reproduce this with HEAD or 7.8.3. Make sure `MyModule.lhs` is not empty. {{{ $ cat Main.lhs \begin{code} import MyModule main = return () \end{code} $ cat MyModule.lhs \begin{code} module MyModule where foo = undefined \end{code} $ ghc --make -fhpc -o main Main.lhs [1 of 2] Compiling MyModule ( MyModule.lhs, MyModule.o ) [2 of 2] Compiling Main ( Main.lhs, Main.o ) Linking main ... $ ./main $ cat main.tix Tix [ TixModule "Main" 1204325935 3 [0,1,1], TixModule "MyModule" 1288191418 0 []] }}} Notice the `0 []` for "MyModule". That should be `2 [0,0]`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/2991#comment:13 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler