compiletest: show usage/help when passed no args #29296
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instead of this panic: ``` thread '<main>' panicked at 'index out of bounds: the len is 1 but the index is 1', src/libcollections/vec.rs:1110 ``` It still panics, just like `-h` does, so it should be okay in this regard.
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…richton instead of this panic: ``` thread '<main>' panicked at 'index out of bounds: the len is 1 but the index is 1', src/libcollections/vec.rs:1110 ``` It still panics, just like `-h` does, so it should be okay in this regard.
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instead of this panic:
It still panics, just like
-hdoes, so it should be okay in thisregard.