bjoernager/rust
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diagnostics: fix crash on completely empty included file

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This commit is contained in:
Michael Howell 2024-03-29 17:13:46 -07:00
parent 1b73c7d1e5
commit 1c41dd6320
2 changed files with 12 additions and 4 deletions
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9
compiler/rustc_errors/src/emitter.rs
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@ -1513,7 +1513,9 @@ impl HumanEmitter {
for line_idx in 0..annotated_file.lines.len() {
let file = annotated_file.file.clone();
let line = &annotated_file.lines[line_idx];
if let Some(source_string) = file.get_line(line.line_index - 1) {
if let Some(source_string) =
line.line_index.checked_sub(1).and_then(|l| file.get_line(l))
{
let leading_whitespace = source_string
.chars()
.take_while(|c| c.is_whitespace())
@ -1553,7 +1555,10 @@ impl HumanEmitter {
for line in &annotated_file.lines {
max_line_len = max(
max_line_len,
annotated_file.file.get_line(line.line_index - 1).map_or(0, |s| s.len()),
line.line_index
.checked_sub(1)
.and_then(|l| annotated_file.file.get_line(l))
.map_or(0, |s| s.len()),
);
for ann in &line.annotations {
span_right_margin = max(span_right_margin, ann.start_col.display);