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06b18db01b
Fix ICE caused by invalid spans for shrink_file Fixes rust-lang/rust#148732 There are two issues in this function: 1. the original issue is caused by a typo error, which is fixed in the first commit 2. another different ice(Patch span `7..7` is beyond the end of buffer `0`) will be reported after fixing the first one, is caused by spans cross file boundaries due to macro expansion. It is fixed in the second commit. r? `@nnethercote` edited: also fixes rust-lang/rust#148684, added a new testcase for it in the last commit.