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fix #9829 #11849

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merged 1 commit into from
Aug 4, 2019
Merged

fix #9829 #11849

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2 changes: 1 addition & 1 deletion compiler/vmgen.nim
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Original file line number Diff line number Diff line change
Expand Up @@ -2160,7 +2160,7 @@ proc optimizeJumps(c: PCtx; start: int) =
var d = i + c.code[i].jmpDiff
for iters in countdown(maxIterations, 0):
case c.code[d].opcode
of opcJmp, opcJmpBack:
of opcJmp:
d = d + c.code[d].jmpDiff
of opcTJmp, opcFJmp:
if c.code[d].regA != reg: break
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15 changes: 15 additions & 0 deletions tests/vm/tmaxloopiterations.nim
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Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
discard """
errormsg: "interpretation requires too many iterations; if you are sure this is not a bug in your code edit compiler/vmdef.MaxLoopIterations and rebuild the compiler"
"""

# issue #9829

macro foo(): untyped =
let lines = ["123", "5423"]
var idx = 0
while idx < lines.len():
if lines[idx].len() < 1:
inc(idx)
continue

foo()