Intermittent internal panic

So I use nilaway at work and recently our pipeline started failing due to nilaway throwing a INTERNAL PANIC error. We upgraded our local dev machines to latest as well but are only facing the error intermittently there. Since it is proprietary code I cannot share the snippet that seems to be causing this but I also think it has nothing to do with that file since all that it contains is one struct definition and 10 constant string variables' declarations. This is the error and stacktrace that it throws. The error only shows up occasionally but it is always this error and stacktrace that gets thrown. I am obviously hiding the path and name of the file that it seems to throw this for since this is from my work. I do not know how to write a snippet that would reproduct this issue because I have no idea what it is panicing about. If someone can help me understand the error then I maybe be able to write a snippet that captures the bit of code from the project that is causing this issue. ``` /Users/georgethomasshanti/project/***/***.go:1:1: error: INTERNAL ERROR(s): nilaway_assertion_analyzer: nilaway_function_analyzer: INTERNAL PANIC: the empty identifier is not an expression - don't pass it to ParseExprAsProducer goroutine 74273 [running]: runtime/debug.Stack() /opt/homebrew/opt/go/libexec/src/runtime/debug/stack.go:26 +0x64 go.uber.org/nilaway/assertion/function.analyzeFunc.func1() /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/analyzer.go:443 +0x50 panic({0x104de1ca0?, 0x104e83160?}) /opt/homebrew/opt/go/libexec/src/runtime/panic.go:792 +0x124 go.uber.org/nilaway/assertion/function/assertiontree.(*RootAssertionNode).ParseExprAsProducer.func1(0x14000067008?) /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/assertiontree/parse_expr_producer.go:63 +0x98c go.uber.org/nilaway/assertion/function/assertiontree.(*RootAssertionNode).ParseExprAsProducer(0x140716d1130, {0x104e885c8?, 0x14023434f00}, 0x0) /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/assertiontree/parse_expr_producer.go:189 +0x12bc go.uber.org/nilaway/assertion/function/assertiontree.(*RootAssertionNode).AddProduction(0x140716d1130, 0x1405bfd7f00, {0x0, 0x0, 0x0}) /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/assertiontree/root_assertion_node.go:333 +0x40 go.uber.org/nilaway/assertion/function/assertiontree.backpropAcrossAssignment(0x140716d1130, {0x14023434f40, 0x2, 0x2}, {0x1401d8c85f0, 0x1, 0x1}) /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/assertiontree/backprop.go:392 +0x6ac go.uber.org/nilaway/assertion/function/assertiontree.backpropAcrossNode(0x140716d1130, {0x104e86de8?, 0x14022b90b40}) /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/assertiontree/backprop.go:69 +0x264 go.uber.org/nilaway/assertion/function/assertiontree.backpropAcrossBlock(0x140716d1130, 0x14149c57d40) /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/assertiontree/backprop.go:44 +0x78 go.uber.org/nilaway/assertion/function/assertiontree.BackpropAcrossFunc({0x104e896a8, 0x1414547f900}, 0x14145431a30, 0x1403595e1e0, {0x1403595e1e0, 0x0, 0x14145431a30, 0x141458dc150, 0x141458dc120, 0x141458bfb30, ...}, ...) /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/assertiontree/backprop.go:1013 +0x8e8 go.uber.org/nilaway/assertion/function.analyzeFunc({0x104e896a8?, 0x1414547f900?}, 0x14145431a30, 0x1403595e1e0, {0x1403595e1e0, 0x0, 0x14145431a30, 0x141458dc150, 0x141458dc120, 0x141458bfb30, ...}, ...) /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/analyzer.go:449 +0xe4 created by go.uber.org/nilaway/assertion/function.run in goroutine 10106 /Users/georgethomasshanti/go/pkg/mod/go.uber.org/nilaway@v0.0.0-20250821055425-361559d802f0/assertion/function/analyzer.go:188 +0x1074 ```