fix #22448 Remove structuredErrorHook temporary in tryConstExpr (#22450)

* fix #22448

* add test

compiler/sem.nim

@@ -353,6 +353,11 @@ proc tryConstExpr(c: PContext, n: PNode; expectedType: PType = nil): PNode =
   c.config.m.errorOutputs = {}
   c.config.errorMax = high(int) # `setErrorMaxHighMaybe` not appropriate here
 
+  when defined(nimsuggest):
+    # Remove the error hook so nimsuggest doesn't report errors there
+    let tempHook = c.graph.config.structuredErrorHook
+    c.graph.config.structuredErrorHook = nil
+
   try:
     result = evalConstExpr(c.module, c.idgen, c.graph, e)
     if result == nil or result.kind == nkEmpty:
@@ -363,6 +368,10 @@ proc tryConstExpr(c: PContext, n: PNode; expectedType: PType = nil): PNode =
   except ERecoverableError:
     result = nil
 
+  when defined(nimsuggest):
+    # Restore the error hook
+    c.graph.config.structuredErrorHook = tempHook
+
   c.config.errorCounter = oldErrorCount
   c.config.errorMax = oldErrorMax
   c.config.m.errorOutputs = oldErrorOutputs

nimsuggest/tests/t22448.nim

@@ -0,0 +1,11 @@
+proc fn(a: static float) = discard
+proc fn(a: int) = discard
+
+let x = 1
+fn(x)
+
+discard """
+$nimsuggest --tester --v3 $file
+>chk $file
+chk;;skUnknown;;;;Hint;;*
+"""