fixes #4308, fixes #4905

compiler/cgen.nim

@@ -194,6 +194,8 @@ proc genLineDir(p: BProc, t: PNode) =
   var tt = t
   #while tt.kind in {nkStmtListExpr}+nkCallKinds:
   #  tt = tt.lastSon
+  if tt.kind in nkCallKinds and tt.len > 1:
+    tt = tt.sons[1]
   let line = tt.info.safeLineNm
 
   if optEmbedOrigSrc in gGlobalOptions:

compiler/evaltempl.nim

@@ -104,6 +104,25 @@ proc evalTemplateArgs(n: PNode, s: PSym; fromHlo: bool): PNode =
 var evalTemplateCounter* = 0
   # to prevent endless recursion in templates instantiation
 
+proc wrapInComesFrom*(info: TLineInfo; res: PNode): PNode =
+  when true:
+    result = res
+    result.info = info
+    if result.kind in {nkStmtList, nkStmtListExpr}:
+      result.lastSon.info = info
+    when false:
+      # this hack is required to
+      var x = result
+      while x.kind == nkStmtListExpr: x = x.lastSon
+      if x.kind in nkCallKinds:
+        for i in 1..<x.len:
+          if x[i].kind in nkCallKinds:
+            x.sons[i].info = info
+  else:
+    result = newNodeI(nkPar, info)
+    result.add res
+    result.flags.incl nfNone
+
 proc evalTemplate*(n: PNode, tmpl, genSymOwner: PSym; fromHlo=false): PNode =
   inc(evalTemplateCounter)
   if evalTemplateCounter > 100:
@@ -132,5 +151,5 @@ proc evalTemplate*(n: PNode, tmpl, genSymOwner: PSym; fromHlo=false): PNode =
     #if ctx.instLines: result.info = n.info
     for i in countup(0, safeLen(body) - 1):
       evalTemplateAux(body.sons[i], args, ctx, result)
-
+  result = wrapInComesFrom(n.info, result)
   dec(evalTemplateCounter)

compiler/sem.nim

@@ -369,6 +369,7 @@ proc semMacroExpr(c: PContext, n, nOrig: PNode, sym: PSym,
   result = evalMacroCall(c.module, c.cache, n, nOrig, sym)
   if efNoSemCheck notin flags:
     result = semAfterMacroCall(c, result, sym, flags)
+  result = wrapInComesFrom(nOrig.info, result)
   popInfoContext()
 
 proc forceBool(c: PContext, n: PNode): PNode =

tests/errmsgs/tdont_show_system.nim

@@ -0,0 +1,13 @@
+discard """
+  errormsg: "value of type 'bool' has to be discarded"
+  line: 13
+  file: "tdont_show_system.nim"
+"""
+
+# bug #4308
+
+#proc getGameTile: int =
+#  1 > 0
+
+# bug #4905  subsumes the problem of #4308:
+true notin {false}

tests/errmsgs/tproper_stacktrace.nim

@@ -0,0 +1,11 @@
+discard """
+  outputsub: '''tproper_stacktrace.nim(7) tproper_stacktrace'''
+  exitcode: 1
+"""
+
+template fuzzy(x) =
+  echo x[] != 9
+
+var p: ptr int
+fuzzy p
+