Bug(s) in the compiler

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Posted by Robert G Laurin on May 01, 2012 at 11:45:49: Uploaded files: 4

I encountered this before, but this time I got to document it.

When compiling a program that INCLUDEs legacy USEFILES (aka CED source), if a ARRAY variable is RE-Declared using a SET number from the dot-IBS source, it generates an error.

In the demo program attached, the variable W$(TEN) is declared in the source and the usefile. This generates a compiler error "M04: Variable as been previously declared" (oops, there's a missing 'h' in 'has').

Something else, the source line of the error is showing TWICE (with option 'L').

One complaint I still have, in the compile listing it is difficult to locate actual errors. Between the warnings & errors it gets messy, worst so when the compile listing is in the many-many thousand lines range.

See attached for sources, below is compile listing of demo.

This was tested using Comet16 2011.459 and Rel 12.05


      1 TEST-IB IBS  0000 ! //IB// Src(TEST-IB.IBS,TMP) Obj(TEST-IB,TMP) Opt(L)
      2 TEST-IB IBS  0000
      3 TEST-IB IBS  0000 !
      4 TEST-IB IBS  0000 !  Test Demo program to Highlite Compiler Bug(s)
      5 TEST-IB IBS  0000 !
      6 TEST-IB IBS  0000
      7 TEST-IB IBS  0000 SET TEN = 10
      8 TEST-IB IBS  0000
      9 TEST-IB IBS  0000 LENGTH 20 & LOCAL B$(TEN)
     10 TEST-IB IBS  0000 LENGTH 20 & LOCAL W$(10)
     11 TEST-IB IBS  0000 LENGTH 20 & LOCAL X$
     12 TEST-IB IBS  0000
     13 TEST-IB IBS  0000 INCLUDE '#IBTEST'
  10000 #IBTEST      0000 !
  10010 #IBTEST      0000 !  Demo INCLUDE File for Compiler Bug(s)
  10020 #IBTEST      0000 !
  10030 #IBTEST      0000 !
  10040 #IBTEST      0000 SET NINE = 9
  10050 #IBTEST      0000 !
  10060 #IBTEST      0000 LENGTH 20 & LOCAL A$
  10070 #IBTEST      0000 !
  10080 #IBTEST      0000 LENGTH 20 & LOCAL B$(10)
* C:\DOCUME~1\RLAURIN\LOCALS~1\TEMP\CATEMP\#IBTEST (10080,24): warning ***** VARIABLE 'B$       ' HAS BEEN PREVIOUSLY DECLARED *****
  10090 #IBTEST      0000 !
  10100 #IBTEST      0000 LENGTH 20 & LOCAL W$(TEN)
  10100 #IBTEST      0000 LENGTH 20 & LOCAL W$(TEN)
* #IBTEST(10100,24): error M04: Variable as been previously defined
  10110 #IBTEST      0000 !
  10120 #IBTEST      0000 LENGTH 20 & LOCAL X$
* C:\DOCUME~1\RLAURIN\LOCALS~1\TEMP\CATEMP\#IBTEST (10120,20): warning ***** VARIABLE 'X$       ' HAS BEEN PREVIOUSLY DECLARED *****
  10130 #IBTEST      0000 !
  10140 #IBTEST      0000 LENGTH 20 & LOCAL Y$(TEN)
  10150 #IBTEST      0000 !
  10160 #IBTEST      0000 LENGTH 20 & LOCAL Z$(NINE)
  10170 #IBTEST      0000 !
     14 TEST-IB IBS  0000
     15 TEST-IB IBS  0000 !====================== Executables ==============
     16 TEST-IB IBS  0000
     17 TEST-IB IBS  0000 CLEAR
     18 TEST-IB IBS  000A
     19 TEST-IB IBS  000A
     20 TEST-IB IBS  000A PRINT (0) W$(1)    ! DO SOMETHING, ANYTHING
     21 TEST-IB IBS  0012
     22 TEST-IB IBS  0012
     23 TEST-IB IBS  0012 RUN 'QMONITOR'
ZZZZZZZ TEST-IB IBS  0016 END
WARNING: Unreferenced Variable A$
WARNING: Unreferenced Array    Y$
WARNING: Unreferenced Array    Z$
Compilation Memory Usage
     Available     00065057
     Symbol Table  00000181
TOTAL ERRORS 00001


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