<i>Based on my reading of the code, I think the problem may be in this line</i>

That generated a different error! (Ignore LJ's invalid markup freakout as well.)

S2 Compiler Output at Fri Jun 10 04:29:29 2016
Error compiling layer:

Compile error: line 1366, column 30: Can't reference member variable in non-class function
S2::NodeVarRef, S2/NodeVarRef.pm, 204
S2::NodeVarRef, S2/NodeVarRef.pm, 151
S2::NodeTerm, S2/NodeTerm.pm, 174
S2::NodeTerm, S2/NodeTerm.pm, 66
S2::NodeSum, S2/NodeSum.pm, 65
S2::NodeSum, S2/NodeSum.pm, 64
S2::NodeSum, S2/NodeSum.pm, 64
S2::NodeSum, S2/NodeSum.pm, 64
S2::NodeSum, S2/NodeSum.pm, 64
S2::NodeSum, S2/NodeSum.pm, 64
S2::NodeSum, S2/NodeSum.pm, 64
S2::NodeSum, S2/NodeSum.pm, 64
S2::NodeTerm, S2/NodeTerm.pm, 76
S2::NodeTerm, S2/NodeTerm.pm, 66
S2::NodeExpr, S2/NodeExpr.pm, 46
S2::NodePrintStmt, S2/NodePrintStmt.pm, 55
S2::NodeStmtBlock, S2/NodeStmtBlock.pm, 108
S2::NodeIfStmt, S2/NodeIfStmt.pm, 92
S2::NodeStmtBlock, S2/NodeStmtBlock.pm, 108
S2::NodeFunction, S2/NodeFunction.pm, 230
S2::Checker, S2/Checker.pm, 374
S2::Compiler, S2/Compiler.pm, 35

Context
1362: }
1363: if($subject != "") {
1364: """
1365: <tr>
1366: <td class="dateheader"$screenedfg><a href="$.permalink_url"$*text_subject</a></td>
1367: <td class="datecontent"$screenedfg>$subject</td>
1368: </tr>
1369: """;
1370: }