Index: generic/tclCompile.c
==================================================================
--- generic/tclCompile.c
+++ generic/tclCompile.c
@@ -2601,11 +2601,12 @@
 	    wordIdx++, tokenPtr += tokenPtr->numComponents + 1) {
         TclAdvanceLines         (&wordLine, last, tokenPtr->start);
 	TclAdvanceContinuations (&wordLine, &wordNext,
 				 tokenPtr->start - envPtr->source);
 	wwlines[wordIdx] =
-		(TclWordKnownAtCompileTime(tokenPtr, NULL) ? wordLine : -1);
+		((wordIdx == 0) || TclWordKnownAtCompileTime(tokenPtr, NULL))
+		? wordLine : -1;
 	ePtr->line[wordIdx] = wordLine;
 	ePtr->next[wordIdx] = wordNext;
 	last = tokenPtr->start;
     }
 

Index: tests/info.test
==================================================================
--- tests/info.test
+++ tests/info.test
@@ -1815,10 +1815,27 @@
 	}] 0 2] \n
     }
 } -result {* {type source line 1807 file info.test cmd {info frame $level} proc ::etrace level 0}
 * {type source line 1814 file info.test cmd etrace level 1}
 * {type source line 1812 file info.test cmd uplevel\\ \\\\ level 1}} -cleanup {interp delete sub}
+
+test info-39.0 {Bug 4b61afd660} -setup {
+    proc probe {} {
+	return [dict get [info frame -1] line]
+    }
+    set body {
+	set cmd probe
+	$cmd
+    }
+    proc demo {} $body
+} -body {
+    demo
+} -cleanup {
+    unset -nocomplain body
+    rename demo {}
+    rename probe {}
+} -result 3
 
 # cleanup
 catch {namespace delete test_ns_info1 test_ns_info2}
 ::tcltest::cleanupTests
 return