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The Tor Browser
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disposal-errors-dont-get-caught-by-non-encl-try-catches.js (1220B)

      1 // |jit-test| skip-if: !getBuildConfiguration("explicit-resource-management"); --enable-explicit-resource-management
      2 
      3 load(libdir + "asserts.js");
      4 
      5 class CustomError extends Error {}
      6 
      7 {
      8  const disposed = [];
      9  let catchCalled = false;
     10  function testDisposalErrorIsNotCaughtByNonEnclosingTry() {
     11    using x = {
     12      [Symbol.dispose]() {
     13        disposed.push('a');
     14        throw new CustomError("dispose error");
     15      }
     16    }
     17 
     18    try {
     19      return;
     20    } catch {
     21      catchCalled = true;
     22    }
     23  }
     24  assertThrowsInstanceOf(testDisposalErrorIsNotCaughtByNonEnclosingTry, CustomError);
     25  assertArrayEq(disposed, ['a']);
     26  assertEq(catchCalled, false);
     27 }
     28 
     29 {
     30  const disposed = [];
     31  let catchCalled = false;
     32  function testDisposalErrorIsNotCaughtByNonEnclosingTryWhenLabelledBlocks() {
     33    outer: {
     34      using x = {
     35        [Symbol.dispose]() {
     36          disposed.push('a');
     37          throw new CustomError("dispose error");
     38        }
     39      }
     40  
     41      try {
     42        break outer;
     43      } catch {
     44        catchCalled = true;
     45      }
     46    }
     47  }
     48 
     49  assertThrowsInstanceOf(testDisposalErrorIsNotCaughtByNonEnclosingTryWhenLabelledBlocks, CustomError);
     50  assertArrayEq(disposed, ['a']);
     51  assertEq(catchCalled, false);
     52 }