std: Fix env() assert when an environment variable's value contains a '=' char #1863
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`intrinsic-test`: combine rust files for faster compilation
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`intrinsic-test`: combine rust files for faster compilation
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This patch fixes a rust build error from env() assertion failures.
MingW on Windows seems to set some funky environment variables like "=C:=C:\MinGW\msys\1.0\bin" and "!::=::" that cause some assertion failures when trying to build rust. Some of the environment variables may contain '=' chars in their value or even their name!
This small patch avoids the assertion failure. I chose not to hide or sanitize these funky environment variables because they do exist in the system environment. I am also lazy.