error.cc: Only suggest show-trace when truncated trace items would be printed

Otherwise, a trace consisting of

frame
frame
frame
non-frame

... would reach the non-frame and print the suggestion, even though
it would have ignored the non-frame anyway.

This resulted in a peculariar situation where --show-trace would have
no apparent effect, as the trace was actually already complete.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libutil/error.cc b/src/libutil/error.cc
index e4f0d4677..c9d61942a 100644
--- a/src/libutil/error.cc
+++ b/src/libutil/error.cc
@@ -302,14 +302,14 @@ std::ostream & showErrorInfo(std::ostream & out, const ErrorInfo & einfo, bool s
     if (!einfo.traces.empty()) {
         size_t count = 0;
         for (const auto & trace : einfo.traces) {
+            if (trace.hint.str().empty()) continue;
+            if (frameOnly && !trace.frame) continue;
+
             if (!showTrace && count > 3) {
                 oss << "\n" << ANSI_WARNING "(stack trace truncated; use '--show-trace' to show the full trace)" ANSI_NORMAL << "\n";
                 break;
             }
 
-            if (trace.hint.str().empty()) continue;
-            if (frameOnly && !trace.frame) continue;
-
             count++;
             frameOnly = trace.frame;