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conan install nspr/4.29@ --build=nspr --profile=/home/conan/w/BuildSingleReference/49220/b2d7345e-30d3-48dc-8723-d2b5a9903ddd/profile.txt
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Configuration:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=8
os=Linux
[options]
nspr:shared=False
[build_requires]
[env]

nspr/4.29: Forced build from source
Installing package: nspr/4.29
Requirements
    nspr/4.29 from local cache - Cache
Packages
    nspr/4.29:544a728eecd5da8a133f3286f1def4032595b14e - Build

Installing (downloading, building) binaries...
nspr/4.29: Copying sources to build folder
nspr/4.29: Building your package in /home/conan/w/BuildSingleReference/.conan/data/nspr/4.29/_/_/build/544a728eecd5da8a133f3286f1def4032595b14e
nspr/4.29: Generator cmake created conanbuildinfo.cmake
nspr/4.29: Aggregating env generators
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK. 'fPIC' option found and apparently well managed
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
nspr/4.29: Calling build()
nspr/4.29: 
nspr/4.29: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/nspr/4.29/_/_/build/544a728eecd5da8a133f3286f1def4032595b14e
nspr/4.29: ERROR: Package '544a728eecd5da8a133f3286f1def4032595b14e' build failed
nspr/4.29: WARN: Build folder /home/conan/w/BuildSingleReference/.conan/data/nspr/4.29/_/_/build/544a728eecd5da8a133f3286f1def4032595b14e
ERROR: nspr/4.29: Error in build() method, line 112
	autotools = self._configure_autotools()
while calling '_configure_autotools', line 78
	"--enable-64bit" if self.settings.arch in self.settings.arch in ("armv8", "x86_64") else "--disable-64bit",
	TypeError: 'in <string>' requires string as left operand, not SettingsItem