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<h1>error_handling_spec.sl</h1>
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<td class="line-num">1</td>
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<td class="code-content"><pre>// ============================================================================</pre></td>
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<td class="line-num">2</td>
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<td class="code-content"><pre>// Error Handling (Try/Catch/Finally) Test Suite</pre></td>
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<td class="line-num">3</td>
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<td class="code-content"><pre>// ============================================================================</pre></td>
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<td class="line-num">4</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">5</td>
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<td class="code-content"><pre>describe("Try/Catch/Finally", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">6</td>
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<td class="code-content"><pre> test("try without error executes normally", fn() {</pre></td>
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<td class="line-num">7</td>
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<td class="code-content"><pre> let result = 0;</pre></td>
</tr><tr class="code-line">
<td class="line-num">8</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
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<td class="line-num">9</td>
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<td class="code-content"><pre> result = 42;</pre></td>
</tr><tr class="code-line">
<td class="line-num">10</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">11</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> result = -1;</pre></td>
</tr><tr class="code-line">
<td class="line-num">12</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">13</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(result, 42);</pre></td>
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<td class="line-num">14</td>
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<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">15</td>
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<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">16</td>
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<td class="code-content"><pre> test("catch handles thrown error", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">17</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let result = "";</pre></td>
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<td class="line-num">18</td>
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<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">19</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> throw "error message";</pre></td>
</tr><tr class="code-line">
<td class="line-num">20</td>
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<td class="code-content"><pre> result = "not reached";</pre></td>
</tr><tr class="code-line">
<td class="line-num">21</td>
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<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">22</td>
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<td class="code-content"><pre> result = "caught";</pre></td>
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<td class="line-num">23</td>
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<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">24</td>
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<td class="code-content"><pre> assert_eq(result, "caught");</pre></td>
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<td class="line-num">25</td>
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<td class="code-content"><pre> });</pre></td>
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<td class="line-num">26</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">27</td>
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<td class="code-content"><pre> test("finally always executes after try", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">28</td>
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<td class="code-content"><pre> let finally_ran = false;</pre></td>
</tr><tr class="code-line">
<td class="line-num">29</td>
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<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">30</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let x = 1;</pre></td>
</tr><tr class="code-line">
<td class="line-num">31</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">32</td>
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<td class="code-content"><pre> let x = 2;</pre></td>
</tr><tr class="code-line">
<td class="line-num">33</td>
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<td class="code-content"><pre> } finally {</pre></td>
</tr><tr class="code-line">
<td class="line-num">34</td>
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<td class="code-content"><pre> finally_ran = true;</pre></td>
</tr><tr class="code-line">
<td class="line-num">35</td>
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<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">36</td>
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<td class="code-content"><pre> assert(finally_ran);</pre></td>
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<td class="line-num">37</td>
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<td class="code-content"><pre> });</pre></td>
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<td class="line-num">38</td>
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<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">39</td>
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<td class="code-content"><pre> test("finally runs after catch", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">40</td>
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<td class="code-content"><pre> let sequence = [];</pre></td>
</tr><tr class="code-line">
<td class="line-num">41</td>
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<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">42</td>
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<td class="code-content"><pre> throw "error";</pre></td>
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<td class="line-num">43</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">44</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> push(sequence, "catch");</pre></td>
</tr><tr class="code-line">
<td class="line-num">45</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } finally {</pre></td>
</tr><tr class="code-line">
<td class="line-num">46</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> push(sequence, "finally");</pre></td>
</tr><tr class="code-line">
<td class="line-num">47</td>
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<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">48</td>
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<td class="code-content"><pre> assert_eq(len(sequence), 2);</pre></td>
</tr><tr class="code-line">
<td class="line-num">49</td>
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<td class="code-content"><pre> assert_eq(sequence[0], "catch");</pre></td>
</tr><tr class="code-line">
<td class="line-num">50</td>
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<td class="code-content"><pre> assert_eq(sequence[1], "finally");</pre></td>
</tr><tr class="code-line">
<td class="line-num">51</td>
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<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">52</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">53</td>
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<td class="code-content"><pre> test("nested try/catch", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">54</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let result = "";</pre></td>
</tr><tr class="code-line">
<td class="line-num">55</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">56</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">57</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> throw "inner";</pre></td>
</tr><tr class="code-line">
<td class="line-num">58</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">59</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> result = "inner caught";</pre></td>
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<td class="line-num">60</td>
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<td class="code-content"><pre> throw "outer";</pre></td>
</tr><tr class="code-line">
<td class="line-num">61</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">62</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">63</td>
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<td class="code-content"><pre> result = result + " outer caught";</pre></td>
</tr><tr class="code-line">
<td class="line-num">64</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">65</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(result, "inner caught outer caught");</pre></td>
</tr><tr class="code-line">
<td class="line-num">66</td>
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<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">67</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">68</td>
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<td class="code-content"><pre> test("try with return in try block", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">69</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let finally_ran = false;</pre></td>
</tr><tr class="code-line">
<td class="line-num">70</td>
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<td class="code-content"><pre> fn test_fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">71</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">72</td>
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<td class="code-content"><pre> return 42;</pre></td>
</tr><tr class="code-line">
<td class="line-num">73</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } finally {</pre></td>
</tr><tr class="code-line">
<td class="line-num">74</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> finally_ran = true;</pre></td>
</tr><tr class="code-line">
<td class="line-num">75</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">76</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">77</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let result = test_fn();</pre></td>
</tr><tr class="code-line">
<td class="line-num">78</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(result, 42);</pre></td>
</tr><tr class="code-line">
<td class="line-num">79</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert(finally_ran);</pre></td>
</tr><tr class="code-line">
<td class="line-num">80</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">81</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">82</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("try with return in catch block", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">83</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let finally_ran = false;</pre></td>
</tr><tr class="code-line">
<td class="line-num">84</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn test_fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">85</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">86</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> throw "error";</pre></td>
</tr><tr class="code-line">
<td class="line-num">87</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">88</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return 100;</pre></td>
</tr><tr class="code-line">
<td class="line-num">89</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } finally {</pre></td>
</tr><tr class="code-line">
<td class="line-num">90</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> finally_ran = true;</pre></td>
</tr><tr class="code-line">
<td class="line-num">91</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">92</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">93</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let result = test_fn();</pre></td>
</tr><tr class="code-line">
<td class="line-num">94</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(result, 100);</pre></td>
</tr><tr class="code-line">
<td class="line-num">95</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert(finally_ran);</pre></td>
</tr><tr class="code-line">
<td class="line-num">96</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">97</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">98</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("catch with different error types", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">99</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let caught_type = "";</pre></td>
</tr><tr class="code-line">
<td class="line-num">100</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">101</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> throw 42;</pre></td>
</tr><tr class="code-line">
<td class="line-num">102</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">103</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> caught_type = type(e);</pre></td>
</tr><tr class="code-line">
<td class="line-num">104</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">105</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(caught_type, "int");</pre></td>
</tr><tr class="code-line">
<td class="line-num">106</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">107</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let caught_string = "";</pre></td>
</tr><tr class="code-line">
<td class="line-num">108</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">109</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> throw "error";</pre></td>
</tr><tr class="code-line">
<td class="line-num">110</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">111</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> caught_string = e;</pre></td>
</tr><tr class="code-line">
<td class="line-num">112</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">113</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(caught_string, "error");</pre></td>
</tr><tr class="code-line">
<td class="line-num">114</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">115</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">116</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("empty try block", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">117</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let ran = false;</pre></td>
</tr><tr class="code-line">
<td class="line-num">118</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">119</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } finally {</pre></td>
</tr><tr class="code-line">
<td class="line-num">120</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> ran = true;</pre></td>
</tr><tr class="code-line">
<td class="line-num">121</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">122</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert(ran);</pre></td>
</tr><tr class="code-line">
<td class="line-num">123</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">124</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">125</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("finally with nested try", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">126</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let order = [];</pre></td>
</tr><tr class="code-line">
<td class="line-num">127</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">128</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">129</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> throw "inner";</pre></td>
</tr><tr class="code-line">
<td class="line-num">130</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } finally {</pre></td>
</tr><tr class="code-line">
<td class="line-num">131</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> push(order, "inner finally");</pre></td>
</tr><tr class="code-line">
<td class="line-num">132</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">133</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">134</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> push(order, "outer catch");</pre></td>
</tr><tr class="code-line">
<td class="line-num">135</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } finally {</pre></td>
</tr><tr class="code-line">
<td class="line-num">136</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> push(order, "outer finally");</pre></td>
</tr><tr class="code-line">
<td class="line-num">137</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">138</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(len(order), 3);</pre></td>
</tr><tr class="code-line">
<td class="line-num">139</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(order[0], "inner finally");</pre></td>
</tr><tr class="code-line">
<td class="line-num">140</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(order[1], "outer catch");</pre></td>
</tr><tr class="code-line">
<td class="line-num">141</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(order[2], "outer finally");</pre></td>
</tr><tr class="code-line">
<td class="line-num">142</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">143</td>
<td class="line-indicator"></td>
<td class="code-content"><pre>});</pre></td>
</tr>
</tbody>
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