zulip/web/templates/blueslip_stacktrace.hbs

{{#each errors}}
    <div class="stacktrace-header">
        <div class="warning-symbol">
            <i class="fa fa-exclamation-triangle"></i>
        </div>
        <div class="message"><strong>Error:</strong> {{ message }}</div>
        {{#if @first}}
            <div class="exit"></div>
        {{/if}}
    </div>
    {{#if more_info}}
        <div class="stacktrace-more-info">{{more_info}}</div>
    {{/if}}
    <div class="stacktrace-content">
        {{#each stackframes}}
            <div data-full-path="{{ full_path }}" data-line-no="{{ line_number }}">
                <div class="stackframe">
                    <i class="fa fa-caret-right expand"></i>
                    <span class="subtle">at</span>
                    {{#if function_name}}
                    {{ function_name.scope }}<b>{{ function_name.name }}</b>
                    {{/if}}
                    <span class="subtle">{{ show_path }}:{{ line_number }}</span>
                </div>
                <div class="code-context" style="display: none">
                    <div class="code-context-content">
                        {{~#each context~}}
                            <div {{#if focus}}class="focus-line"{{/if}}><span class="line-number">{{ line_number }}</span> {{ line }}</div>
                        {{~/each~}}
                    </div>
                </div>
            </div>
        {{/each}}
    </div>
{{/each}}