New submission from Antoine Pitrou:

In PyCompile_OpcodeStackEffect() compile.c:

        case BUILD_MAP:
            return 1;

But starting from 3.5, BUILD_MAP pops 2*oparg objects from the stack.

----------
components: Interpreter Core
messages: 250391
nosy: benjamin.peterson, georg.brandl, pitrou
priority: normal
severity: normal
status: open
title: BUILD_MAP stack effect suboptimal
type: resource usage
versions: Python 3.5, Python 3.6

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue25060>
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