Commits on May 20, 2016

1. Implement the panic profile option …

   This is the Cargo half of the implementation of [RFC 1513] which adds a new
   `profile.*.panic` option to customize the `-C panic` argument to the compiler.
   This is not passed by default and can otherwise be specified as `abort` or
   `unwind` on the nightly compiler.
   
   [RFC 1513]: rust-lang/rfcs#1513
   
   The `profile.*.panic` option is *only* used from the top-level crate, not each
   crate individually. This means that applications should customize this value as
   they see fit, and libraries will only use their own value when they're being
   tested.
   
   Cargo also has specific knowledge that when *testing* a crate it can't pass
   `-C panic=abort` for now as the default test harness requires `panic=unwind`.
   This essentially just means that `cargo test` will continue to work for crates
   that specify `panic=abort` in Cargo.toml.

   

   alexcrichton committed May 20, 2016
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