Panic in summarize

```
$ cargo new hello
$ cd hello
$ RUSTFLAGS=-Zself-profile cargo build
$ ~/measureme/target/release/summarize summarize hello-750698
thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `"codegen_and_optimize_crate"`,
 right: `"codegen_crate"`', summarize/src/analysis.rs:121:17
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
```