nimforum mirror - Unexpected error from the C compiler with Option

quokka70 (orginal) [2019-05-11T04:18:22+02:00] view original

Hi,

Consider the following code

# strange_option.nim
import options

let a: Option[int] = none(var int)

When I compile with nim c strange_option.nim I get the following error


Hint: used config file '/usr/local/Cellar/nim/0.19.4/nim/config/nim.cfg' [Conf]
Hint: system [Processing]
Hint: strange_option [Processing]
Hint: options [Processing]
Hint: typetraits [Processing]
CC: strange_option
Error: execution of an external compiler program 'clang -c  -w  -I/usr/local/Cellar/nim/0.19.4/nim/lib -o /Users/rory/.cache/nim/strange_option_d/strange_option.c.o /Users/rory/.cache/nim/strange_option_d/strange_option.c' failed with exit code: 1

/Users/rory/.cache/nim/strange_option_d/strange_option.c:127:29: error: assigning to 'tyObject_Option_Ryv9bNNePiiahF9b3Btk2KGA' (aka 'struct tyObject_Option_Ryv9bNNePiiahF9b3Btk2KGA') from incompatible type 'tyObject_Option_lceG9aukqGbMbPd5JxWfL2Q' (aka 'struct tyObject_Option_lceG9aukqGbMbPd5JxWfL2Q')
        a_9aGASzYrmK9cmn6qwbMxS3LQ = none_07zXLdOnVAgxb9ckd004ZrQ();
                                   ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

My nim code is clearly bad since the types don't match. But I would expect the nim compiler to complain, not the C compiler.

I am running on a Mac 10.14.4.


22:14:14 $ clang --version                                                                                                                                                                           (:|✔)
Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin18.5.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

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4834 :: Unexpected error from the C compiler with Option