Skip to content

Modify debug assertion to avoid crashing on SyntaxList #47500

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Jan 19, 2022
Merged

Modify debug assertion to avoid crashing on SyntaxList #47500

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
43c3f45
Modify debug assertion to avoid crashing on SyntaxList
jakebailey Jan 19, 2022
9570a59
PR changes
jakebailey Jan 19, 2022
e9a2355
More PR feedback
jakebailey Jan 19, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 7 additions & 5 deletions src/services/utilities.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1297,7 +1297,7 @@ namespace ts {

if (lookInPreviousChild) {
// actual start of the node is past the position - previous token should be at the end of previous child
const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i, sourceFile);
const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i, sourceFile, n.kind);
return candidate && findRightmostToken(candidate, sourceFile);
}
else {
Expand All @@ -1313,7 +1313,7 @@ namespace ts {
// the only known case is when position is at the end of the file.
// Try to find the rightmost token in the file without filtering.
// Namely we are skipping the check: 'position < node.end'
const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length, sourceFile);
const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length, sourceFile, n.kind);
return candidate && findRightmostToken(candidate, sourceFile);
}
}
Expand All @@ -1332,19 +1332,21 @@ namespace ts {
return n;
}

const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length, sourceFile);
const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length, sourceFile, n.kind);
return candidate && findRightmostToken(candidate, sourceFile);
}

/**
* Finds the rightmost child to the left of `children[exclusiveStartPosition]` which is a non-all-whitespace token or has constituent tokens.
*/
function findRightmostChildNodeWithTokens(children: Node[], exclusiveStartPosition: number, sourceFile: SourceFile): Node | undefined {
function findRightmostChildNodeWithTokens(children: Node[], exclusiveStartPosition: number, sourceFile: SourceFile, parentKind: SyntaxKind): Node | undefined {
for (let i = exclusiveStartPosition - 1; i >= 0; i--) {
const child = children[i];

if (isWhiteSpaceOnlyJsxText(child)) {
Debug.assert(i > 0, "`JsxText` tokens should not be the first child of `JsxElement | JsxSelfClosingElement`");
if (i === 0 && (parentKind === SyntaxKind.JsxText || parentKind === SyntaxKind.JsxSelfClosingElement)) {
Debug.fail("`JsxText` tokens should not be the first child of `JsxElement | JsxSelfClosingElement`");
}
}
else if (nodeHasTokens(children[i], sourceFile)) {
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Out of scope, but should children[i] be child here and below?

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Yeah, this seems like an oops. I can fix this, if desired. Shouldn't change anything.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Maybe as a follow-up.

return children[i];
Expand Down
8 changes: 8 additions & 0 deletions tests/cases/fourslash/quickInfoOnClosingJsx.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
/// <reference path="fourslash.ts" />

// @Filename: foo.tsx
////let x = <div>
//// /*$*/</div >

goTo.marker("$");
verify.not.quickInfoExists();