Repository: eslint/eslint
File: lib/rules/preserve-caught-error.js (JavaScript)

Code before:

					// Check if there are throw statements and caught error is being ignored
					if (!caughtError) {
						if (requireCatchParameter) {
							context.report({
								node: throwStatement,
								messageId: "missingCatchErrorParam",
							});
							return;
						}
						return;
					}

					// Check if there is a cause attached to the new error
					const thrownErrorCause = getErrorCause(throwStatement);

					if (thrownErrorCause === UNKNOWN_CAUSE) {
						// Error options exist, but too complicated to be analyzed/fixed
						return;
					}

					if (thrownErrorCause === MULTIPLE_CAUSE) {
						// Multiple cause properties found, no reliable suggestion can be made

						context.report({
							messageId: "incorrectCause",
							node: throwStatement,
						});
						return;
					}

					if (thrownErrorCause === null) {
						// If there is no `cause` attached to the error being thrown.
						context.report({
							messageId: "missingCause",
							node: throwStatement,
							suggest: [
								{
									messageId: "includeCause",
									fix(fixer) {
										const throwExpression =
											throwStatement.argument;
										const args = throwExpression.arguments;
										const errorType =
											throwExpression.callee.name;

										// AggregateError: errors, message, options
										if (errorType === "AggregateError") {
											const errorsArg = args[0];
											const messageArg = args[1];
											const optionsArg = args[2];

Review comment (suggestion):
I'm not sure if there should be a different error message when `cause` is defined multiple times.

Code after:
							context.report({
								node: throwStatement,
								messageId: "missingCatchErrorParam",
							});
							return;
						}
						return;
					}

					// Check if there is a cause attached to the new error
					const errorCauseInfo = getErrorCause(throwStatement);

					if (errorCauseInfo === UNKNOWN_CAUSE) {
						// Error options exist, but too complicated to be analyzed/fixed
						return;
					}

					if (errorCauseInfo === null) {
						// If there is no `cause` attached to the error being thrown.
						context.report({
							messageId: "missingCause",
							node: throwStatement,
							suggest: [
								{
									messageId: "includeCause",
									fix(fixer) {
										const throwExpression =
											throwStatement.argument;
										const args = throwExpression.arguments;
										const errorType =
											throwExpression.callee.name;

										// AggregateError: errors, message, options
										if (errorType === "AggregateError") {
											const errorsArg = args[0];
											const messageArg = args[1];
											const optionsArg = args[2];

											if (!errorsArg) {
												// Case: `throw new AggregateError()` → insert all arguments
												const lastToken =
													sourceCode.getLastToken(
														throwExpression,
													);
												const lastCalleeToken =
													sourceCode.getLastToken(
														throwExpression.callee,
													);
												const parenToken =
													sourceCode.getFirstTokenBetween(
														lastCalleeToken,