Use @isdefined

Project.toml

@@ -1,7 +1,7 @@
 name = "TruncatedStacktraces"
 uuid = "781d530d-4396-4725-bb49-402e4bee1e77"
 authors = ["Chris Rackauckas <[email protected]> and contributors"]
-version = "1.2.0"
+version = "1.2.1"
 
 [deps]
 InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"

README.md

@@ -51,8 +51,8 @@ how to effect the type printing. This is done by adding `println(io, VERBOSE_MSG
 
 ## Default values
 
-    * `TruncatedStacktraces.VERBOSE[]` defaults to `false` for non-CI workflows and to `true` for CI jobs.
-    * `TruncatedStacktraces.DISABLE` defaults to `false`.
+* `TruncatedStacktraces.VERBOSE[]` defaults to `false` for non-CI workflows and to `true` for CI jobs.
+* `TruncatedStacktraces.DISABLE` defaults to `false`.
 
 ## Disabling TruncatedStacktraces.jl
 

src/TruncatedStacktraces.jl

@@ -68,12 +68,13 @@ macro truncate_stacktrace(l::Symbol, short_display...)
         kwargs = []
 
         body = quote
-            if TruncatedStacktraces.VERBOSE[]
+            wparams = [$(whereparams[[short_display...]]...)]
+            any_not_defined = any(!@isdefined(w) for w in wparams)
+            if TruncatedStacktraces.VERBOSE[] || any_not_defined
                 invoke(show, Tuple{IO, Type}, io, t)
             else
                 print(io,
-                      string($l) * "{" *
-                      join([$(whereparams[[short_display...]]...)], ", ") *
+                      string($l) * "{" * join(wparams, ",") *
                       $(length(short_display) == 0 ? "" : ",") * "…}")
             end
         end