Unexpected translator yaml config validation error in version 1.11.0

[Vykstorm]

Bug description

Marian server (1.11.0) raises a yaml configuration error due to line 57 of src/config/config_validator.cpp no matter which command line arguments you specify. I know this because i debugged the source code by adding breaking points. The error raised by marian server is the next: YAML::InvalidNode: This may result from using a map iterator as a sequence iterator, or vice-versa Marian server can be deployed correctly by commenting that line.

How to reproduce

Run: ./build/marian-server -m <your model>.npz (version 1.11.0) where .npz is a valid model. You can also include any other command line argument.

Context

• Marian version: v1.11.0 8afcd53 2022-04-25 11:48:17 +0200
• Compiled with:

  cmake \
  -DUSE_STATIC_LIBS=on \
  -DUSE_DOXYGEN=off \
  -DCOMPILE_CPU=off \
  -DCOMPILE_CUDA=on \
  -DCOMPILE_SERVER=on \
  -DUSE_CUDNN=off \
  -DCMAKE_BUILD_TYPE=Release \
  -DUSE_MKL=off \
  -DUSE_SENTENCEPIECE=off \
  -DCUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda-10.1 \
  ...

• ./marian-server --build-info:

  AVX2_FOUND=true
  AVX_FOUND=true
  BUILD_ARCH=native
  CMAKE_BUILD_TYPE=Debug
  CMAKE_INSTALL_PREFIX=/usr/local
  COMPILE_AVX=ON
  COMPILE_AVX2=ON
  COMPILE_AVX512=ON
  COMPILE_CPU=off
  COMPILE_CUDA=on
  COMPILE_EXAMPLES=OFF
  COMPILE_KEPLER=OFF
  COMPILE_MAXWELL=OFF
  COMPILE_PASCAL=ON
  COMPILE_SERVER=on
  COMPILE_SSE2=ON
  COMPILE_SSE3=ON
  COMPILE_SSE4_1=ON
  COMPILE_SSE4_2=ON
  COMPILE_TESTS=OFF
  COMPILE_TURING=ON
  COMPILE_VOLTA=ON
  CUDA_HOST_COMPILER=/usr/bin/cc
  CUDA_SDK_ROOT_DIR=CUDA_SDK_ROOT_DIR-NOTFOUND
  CUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda-10.1
  CUDA_USE_STATIC_CUDA_RUNTIME=ON
  CUDA_cublasLt_LIBRARY=/usr/lib/x86_64-linux-gnu/libcublasLt_static.a
  CUDA_culibos_LIBRARY=/usr/local/cuda-10.1/lib64/libculibos.a
  CUDA_rt_LIBRARY=/usr/lib/x86_64-linux-gnu/librt.a
  DETERMINISTIC=OFF
  GENERATE_MARIAN_INSTALL_TARGETS=OFF
  SSE4_1_FOUND=true
  SSE4_2_FOUND=true
  USE_APPLE_ACCELERATE=OFF
  USE_CCACHE=OFF
  USE_CUDNN=off
  USE_DOXYGEN=off
  USE_FBGEMM=OFF
  USE_MKL=off
  USE_MPI=OFF
  USE_NCCL=ON
  USE_SENTENCEPIECE=off
  USE_STATIC_LIBS=on