conan+mingw 错误：ERROR: mingw_inst

项目中用到conan+mingw管理c++库，profile文件如下：

[build_requires]
mingw_installer/1.0@conan/stables
[settings]
    os=Windows
    os_build=Windows
    arch=x86
    arch_build=x86
    compiler=gcc
    compiler.version=7.2
    compiler.libcxx=libstdc++11
    build_type=Debug
[options]
[env]

执行conan install --profile=mingw 后，出现如下错误

conan install .. --build=missing --profile=mingw
Configuration:
[settings]
arch=x86
arch_build=x86
build_type=Debug
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=7.2
os=Windows
os_build=Windows
[options]
[build_requires]
*: mingw_installer/1.0@conan/stables
[env]

ERROR: mingw_installer/1.0@conan/stable: 'settings.compiler.exception' value not defined

解决办法如下：
在profile文件中，加入下面两行

    compiler.exception=seh
    compiler.threads=posix