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Do not ICE when synthesizing spans falling inside unicode chars

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This commit is contained in:
Esteban Küber 2019-08-12 23:31:13 -07:00
parent 60960a260f
commit d824edfc2c
3 changed files with 28 additions and 0 deletions
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6
src/libsyntax/source_map.rs
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@ -554,8 +554,14 @@ impl SourceMap {
}
if let Some(ref src) = local_begin.sf.src {
if !src.is_char_boundary(start_index) || !src.is_char_boundary(end_index) {
return Err(SpanSnippetError::IllFormedSpan(sp));
}
return Ok(extract_source(src, start_index, end_index));
} else if let Some(src) = local_begin.sf.external_src.borrow().get_source() {
if !src.is_char_boundary(start_index) || !src.is_char_boundary(end_index) {
return Err(SpanSnippetError::IllFormedSpan(sp));
}
return Ok(extract_source(src, start_index, end_index));
} else {
return Err(SpanSnippetError::SourceNotAvailable {