Fix repeated REPT nodes in backtraces

test/link/rept-trace/a.asm

@@ -0,0 +1,23 @@
+section "test", rom0
+for v1, 4
+ if v1 == 3
+  for v2, 3
+   if v2 == 2
+    for v3, 2
+     if v3 == 1
+      rept 1
+       macro m
+        assert \1
+       endm
+      endr
+      rept 1
+       rept 2
+        m @
+       endr
+      endr
+     endc
+    endr
+   endc
+  endr
+ endc
+endr

test/link/rept-trace/out.err

@@ -0,0 +1,17 @@
+error: assert failure
+    at rept-trace/a.asm::REPT~4::REPT~3::REPT~2::REPT~1::m(10)
+    <- rept-trace/a.asm::REPT~4::REPT~3::REPT~2::REPT~1::REPT~1(15)
+    <- rept-trace/a.asm::REPT~4::REPT~3::REPT~2::REPT~1(14)
+    <- rept-trace/a.asm::REPT~4::REPT~3::REPT~2(13)
+    <- rept-trace/a.asm::REPT~4::REPT~3(6)
+    <- rept-trace/a.asm::REPT~4(4)
+    <- rept-trace/a.asm(2)
+error: assert failure
+    at rept-trace/a.asm::REPT~4::REPT~3::REPT~2::REPT~1::m(10)
+    <- rept-trace/a.asm::REPT~4::REPT~3::REPT~2::REPT~1::REPT~2(15)
+    <- rept-trace/a.asm::REPT~4::REPT~3::REPT~2::REPT~1(14)
+    <- rept-trace/a.asm::REPT~4::REPT~3::REPT~2(13)
+    <- rept-trace/a.asm::REPT~4::REPT~3(6)
+    <- rept-trace/a.asm::REPT~4(4)
+    <- rept-trace/a.asm(2)
+Linking failed with 2 errors

test/link/test.sh

@@ -266,13 +266,19 @@ evaluateTest
 test="pipeline"
 startTest
 continueTest
-("$RGBASM" -Weverything -Bcollapse -o - - | \
- "$RGBLINK" -Weverything -Bcollapse -o - - | \
- "$RGBFIX" -Weverything -v -p 0xff -) < "$test"/a.asm > "$gbtemp"
+("$RGBASM" -o - - | "$RGBLINK" -o - - | "$RGBFIX" -v -p 0xff -) < "$test"/a.asm > "$gbtemp"
 # This test does not trim its output with 'dd' because it needs to verify the correct output size
 tryCmp "$test"/out.gb "$gbtemp"
 evaluateTest
 
+test="rept-trace"
+startTest
+"$RGBASM" -o "$otemp" "$test"/a.asm
+continueTest
+rgblinkQuiet -Bno-collapse -o "$gbtemp" "$otemp" 2>"$outtemp"
+tryDiff "$test"/out.err "$outtemp"
+evaluateTest
+
 test="same-consts"
 startTest
 "$RGBASM" -o "$otemp" "$test"/a.asm