Parallel execution of tests causes flakiness when multiple inline_c tests use the same names for environment variables

[Vibha-Malhotra]

When multiple inline_c tests in a rust file use the same names of environment variables, flakiness is observed during parallel execution of tests.

For example, if all tests in a rust file need an input directory and an output directory, and environment variables INLINE_C_RS_INPUT_PATH and INLINE_C_RS_OUTPUT_PATH are used to pass these values to assert_c macro, cases fail randomly upon running cargo test. To get around this, one needs to use unique environment variable names in each test.

This should be documented.

[Hywan]

Hi,
You're right, that's indeed a dramatic limitation… I am not sure there is a way to workaround that.