Strange error from fontsan

[dns2utf8]

I had this strange error when building servo:

error: failed to run custom build command for `fontsan v0.3.2 (https://github.com/servo/fontsan#08bfa604)`
process didn't exit successfully: `/home/user/servo/target/release/build/fontsan-d1a72de1c2fe1b40/build-script-build` (exit code: 101)
--- stdout
running: "cmake" "/home/user/servo/.cargo/git/checkouts/fontsan-75864180be477bc9/master/src" "-DCMAKE_INSTALL_PREFIX=/home/user/servo/target/release/build/fontsan-d1a72de1c2fe1b40/out" "-DCMAKE_C_FLAGS= -O0 -ffunction-sections -fdata-sections -m64 -fPIC" "-DCMAKE_C_COMPILER=/usr/bin/cc" "-DCMAKE_CXX_FLAGS= -O0 -ffunction-sections -fdata-sections -m64 -fPIC" "-DCMAKE_CXX_COMPILER=/usr/bin/c++" "-DCMAKE_BUILD_TYPE=Release"
-- Configuring done
-- Generating done
-- Build files have been written to: /home/user/servo/target/release/build/fontsan-d1a72de1c2fe1b40/out/build

--- stderr
CMake Error at CMakeLists.txt:119 (add_library):
  Cannot find source file:

    ots/third_party/woff2/src/buffer.h

  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp
  .hxx .in .txx


CMake Error at CMakeLists.txt:118 (add_library):
  Cannot find source file:

    ots/third_party/brotli/dec/decode.h

  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp
  .hxx .in .txx


CMake Error: Cannot determine link language for target "woff2".
CMake Error: CMake can not determine linker language for target: woff2
CMake Error: Cannot determine link language for target "brotli".
CMake Error: CMake can not determine linker language for target: brotli
thread 'main' panicked at '
command did not execute successfully, got: exit code: 1

build script failed, must exit now', /home/user/servo/.cargo/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.17/src/lib.rs:463
note: Run with `RUST_BACKTRACE=1` for a backtrace.

Build FAILED in 0:00:07

It did not go away after

./mach clean

But it went after this:

find . -iname "*fontsan*" | xargs rm -rf 

Do you have any clues why this happend?

[stshine]

This happened because submodules in fontsan didn't get cloned.

[paulrouget]

Happens here as well.

[g2p]

It happens in existing servo checkouts, because fontsan didn't have these submodules in the past.

rm -rf .cargo/git/checkouts/fontsan-75864180be477bc9

fixes it.

[nox]

Seems like this can be closed now.