From d2dc0f3b0f0267941b47bde7bd48d26b2c22ca6a Mon Sep 17 00:00:00 2001 From: David Wood Date: Fri, 15 Oct 2021 14:48:57 +0000 Subject: emitter: current substitution can be multi-line In `splice_lines`, there is some arithmetic to compute the required alignment such that future substitutions in a suggestion are aligned correctly. However, this assumed that the current substitution's span was only on a single line. In circumstances where this was not true, it could result in a arithmetic overflow when the substitution's end column was less than the substitution's start column. Signed-off-by: David Wood --- compiler/rustc_errors/src/lib.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'compiler/rustc_errors/src') diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs index 60a48b5a2d9..9b2094adb15 100644 --- a/compiler/rustc_errors/src/lib.rs +++ b/compiler/rustc_errors/src/lib.rs @@ -341,7 +341,7 @@ impl CodeSuggestion { }); buf.push_str(&part.snippet); let cur_hi = sm.lookup_char_pos(part.span.hi()); - if prev_hi.line == cur_lo.line { + if prev_hi.line == cur_lo.line && cur_hi.line == cur_lo.line { // Account for the difference between the width of the current code and the // snippet being suggested, so that the *later* suggestions are correctly // aligned on the screen. -- cgit 1.4.1-3-g733a5